Respons kedelai akibat  jarak tanam dan konsentrasi giberelin pada tanah inceptisol  Jatinangor

Sari. Teknik budidaya untuk meningkatkan produktivitas kedelai antara lain penggunaan jarak tanam yang tepat dan penambahan input berupa giberelin. Penelitian ini bertujuan untuk memperoleh jarak tanam dan konsentrasi yang tepat agar pertumbuhan dan hasil meningkat. Percobaan dilakukan pada bulan Juli sampai Oktober 2017 di Kebun Percobaan Ciparanje, Fakultas Pertanian Universitas Padjadjaran, dengan ketinggian tempat yaitu ± 780 meter di atas permukaan laut. Percobaan dilakukan dengan menggunakan Rancangan Acak Kelompok pola faktorial, dengan tiga ulangan. Faktor I adalah jarak tanam, terdiri dari 3 taraf, yaitu: jarak tanam 25 cm X 25 cm, jarak tanam 15 cm X 15 cm X 40 cm dan jarak tanam 20 cm X 20 cm X 40 cm. Faktor II adalah konsentrasi Giberelin, terdiri dari 3 taraf, yaitu : konsentrasi 150 ppm, 250 ppm dan 350 ppm. Hasil percobaan menunjukkan bahwa terdapat interaksi antara jarak tanam dan konsentrasi giberelin terhadap indeks luas daun dan jumlah polong per tanaman. Jarak tanam 20 cm X 20 cm X 40 cm memberikan pengaruh yang terbaik terhadap jumlah biji per tanaman, bobot biji per tanaman, dan indeks panen. Konsentrasi giberelin 350 ppm memberikan pengaruh terbaik terhadap jumlah biji per tanaman.Kata Kunci: kedelai, jarak tanam, giberelin, inceptisols. Abstract. Agronomy innovation to increase soybean productivity were spacing management and giberelin application. This study aims to obtain the right plant spacing and the right concentration so increase growth and yield. The experiment was conducted from July to October 2017 at the Ciparanje Experimental Station, Faculty of Agriculture, Padjadjaran University, with altitude of ± 780 m above sea level. It used randomized block design with factorial treatment and three replications. The first factor was plant spacing that consisted of 3 levels: spacing 25 cm X 25 cm, spacing 15 cm X 15 cm X 40 cm and spacing 20 cm X 20 cm X 40 cm. The second factor was giberelin concentration that consisted of 3 levels: concentration of 150 ppm, 250 ppm, and 350 ppm. The experimental results showed that there were interaction between the spacing and the concentration of gibberellins on leaf area index and number of pods per plant. The spacing 20 cm X 20 cm X 40 cm gave best effect on number of grain, weight of grain, and harvest index. The giberelin concentration of 350 ppm has the best influence on the number of seeds per plant.Keywords: soybean, plant-spacing, gibberelin, inceptisols.

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Pengaruh pupuk hayati dan pengapuran terhadap produktivitas kedelai di tanah Inceptisol Jatinangor

Kultivasi ◽

10.24198/kultivasi.v17i2.18117 ◽

2018 ◽

Vol 17 (2) ◽

Author(s):

Aep Wawan Irwan ◽

Tati Nurmala

Keyword(s):

Harvest Index ◽

Root Nodule ◽

Block Design ◽

Dry Weight ◽

Area Index ◽

Randomized Block Design ◽

Agricultural Faculty ◽

Lime Application ◽

Biological Fertilizer ◽

Number Of Seeds

ABSTRAK Kedelai merupakan tanaman pangan dengan kandungan protein tinggi sebagai bahan baku utama berbagai makanan, sehingga kebutuhan kedelai di Indonesia selalu tinggi. Hasil kedelai dapat ditingkatkan melalui aplikasi pupuk hayati dan pengapuran. Penelitian ini dilaksanakan di Kebun Percobaan Fakultas Pertanian Universitas Padjadjaran, Jatinangor, Sumedang pada ordo tanah Inseptisol. Penelitian dilakukan dari Maret 2017 sampai Juni 2017. Rancangan percobaannya adalah Rancangan Acak Kelompok, terdiri dari sembilan perlakuan, yaitu tanpa pupuk hayati dan tanpa pengapuran (kontrol); pupuk hayati 5 liter/ha + tanpa pengapuran; pupuk hayati 8 liter/ha + tanpa pengapuran; tanpa pupuk hayati + pengapuran 140 kg/ha; pupuk hayati 5 liter/ha + pengapuran 140 kg/ha; pupuk hayati 8 liter/ha + pengapuran 140 kg/ha; tanpa pupuk hayati + pengapuran 200 kg/ha; pupuk hayati 5 liter/ha + pengapuran 200 kg/ha; dan pupuk hayati 8 liter/ha + pengapuran 200 kg/ha. Semua perlakuan diulang 3 kali. Hasil percobaannya yaitu aplikasi pupuk hayati dan pengapuran tidak menunjukkan berpengaruh nyata terhadap jumlah polong, jumlah biji, jumlah bunga, bobot kering tanaman, bintil akar efektif, Indeks Luas Daun (ILD), bobot biji, Indeks Panen dan bobot 100 butir, namun berpengaruh nyata pada pengamatan tinggi tanaman serta jumlah cabang produktif. Hasil panen tertinggi mencapai 36,86 g/tanaman atau sekitar 1,1 ton/ha.Kata kunci : kedelai, pengapuran, pupuk hayati, inceptisols. ABSTRACT Soybean is a food plant with high vegetable protein content, is always lack of demand. Its yield can be improved by biofertilizer and lime application. This research was conducted at Experimental Field of Agricultural Faculty of Padjadjaran University, Jatinangor, Sumedang, on Inceptisols, from March 2017 to June 2017. It used Randomized Block Design, nine treatments and three replications, as follows: without biological fertilizer and without liming (control); biological fertilizer 5 liters / ha + without liming; biological fertilizer 8 liters / ha + without liming; without biological fertilizer + liming 140 kg / ha; biological fertilizer 5 liters / ha + liming 140 kg / ha; biological fertilizer 8 liters / ha + liming 140 kg / ha; without biological fertilizer + liming 200 kg / ha; biological fertilizer 5 liters / ha + liming 200 kg / ha; and biological fertilizer 8 liters / ha + liming 200 kg / ha. The results showed that there were no significant effect on the number of pods, the number of seeds, the number of flowers, the dry weight of the plant, the effective root nodule, leaf area index (ILD), yield, harvest index, and 100 grain weight, but there were significant effect on plant height and number of productive branches. The best yield reached 36.86 g / plant or about 1.1 tons / ha.Key words : soybean, liming, biological fertilizer, inceptisols.

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PENGARUH PEMBERIAN PUPUK CAIR BIO URINE SAPI TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KEDELAI (Glycine max L.)

AGRICA ◽

10.37478/agr.v5i2.450 ◽

2020 ◽

Vol 5 (2) ◽

pp. 96-105

Author(s):

Murdaningsih Murdaningsih ◽

Marsianus Nate Ugha

Keyword(s):

Glycine Max ◽

Leaf Area ◽

Harvest Index ◽

Block Design ◽

Dry Weight ◽

Growth And Yield ◽

Soybean Plant ◽

Optimum Dosage ◽

Randomized Block Design ◽

Glycine Max L

This research aims to know the effect as well as the optimum rates of manure of urine cow bio to the growth and yield of the soybean plant. The design used in this study was Randomized Block Design and the treatment used is U0 (without bio urine manure), U1 (1375 litres of bio urine manure ha-1 or 550 ml plots-1), U2 (bio urine manure of 2750 litre ha-1 or 1100ml plots -1), U3 (bio urine manure 4125 litre ha-1 or 1650 ml plot-1), and U4 (bio urine manure of 5500 litre ha-1 or 2200 ml plot-1). Variable observation in this study is the height of the plant 33.8 cm, leaf number 2.90 strands, leaf area 1.17cm2, the weight of fresh residues tan-114,74 gr, dry oven weight of residue tan-1 15.50 gr, dry oven weight of residue ha-1 15.50kg, the number of pods 9.44 soybean, weight of 100 grain of soybean 1 0.91 gr, the weight of the seed tan-110.30 gr, seed dry weight ha-110, 30 kg, harvest index of 4.88 and optimum dosage of the manure of urine cow bio is 5500 litres ha-1 can increase the growth and yield of soybeans.

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Respons Tanaman Jagung (Zea mays L.) Hibrida Akibat Jarak Tanam Berbeda Pada Sistem Tatam Legowo (2:1) Dan Jenis Pupuk Organik Di Inceptisols Jatinangor.

Paspalum: Jurnal Ilmiah Pertanian ◽

10.35138/paspalum.v6i1.74 ◽

2018 ◽

Vol 6 (1) ◽

pp. 20

Author(s):

Agus Wahyudin ◽

Y. Yuwariah ◽

Fiky Yulianto W ◽

A. F. Kevin A

Keyword(s):

Zea Mays ◽

Leaf Area Index ◽

Zea Mays L ◽

Block Design ◽

Organic Fertilizer ◽

Growth And Yield ◽

Cow Manure ◽

Plant Spacing ◽

Area Index ◽

Randomized Block Design

The objective of this research was to find the best combination of plant spacing and organic fertilizer on the growth and yield of maize (Zea mays L.) Pertiwi-3 in Jatinangor. The experiment was carried outin Ciparanje experimental field on November 2016 to March 2017. The experiment used was Randomized Block Design (RBD) which consisted of six treatments and four replications, which were the plant spacing 20cmx20xmx75cm + 5t/ha compost, 25cmx25cmx75cm + 5t/ha compost, 30cmx30cmx75cm + 5t/ha compost, 20cmx20cmx75cm + 5t/ha cow manure, 25cmx25cmx75cm + 5t/ha cow manure and 30cmx30cmx75cm + 5t/ha cow manure. The result of the experiment showed that the best result of 100 dry seeds weight was in the treatment of plant spacing 20cmx20cmx75cm + 5t/ha cow manure with a weight of 45,19g. The highest score of Leaf Area Index (LAI) was in the treatment of plant spacing 20cmx20cmx75cm + 5t/ha cow manure score of 2,92 was not significantly different from the treatment of plant spacing 20cmx20cmx75cm + 5t/ha compost with score of 2,82.

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Pengaruh Jarak Tanam dan Aplikasi Pupuk NPK terhadap Pertumbuhan dan Hasil Tanaman Kedelai (Glycine max L. Merril) Varietas Kaba

Agrikultura ◽

10.24198/agrikultura.v26i2.8466 ◽

2015 ◽

Vol 26 (2) ◽

Author(s):

Deden Deden

Keyword(s):

Glycine Max ◽

Experimental Method ◽

Block Design ◽

Fertilizer Application ◽

Growth And Yield ◽

Soybean Plant ◽

Plant Spacing ◽

Area Index ◽

Glycine Max L ◽

Npk Fertilizer

ABSTRACTEffect of Plant Spacing and NPK Fertilizer Application on Plant Growth and Yield of Soybean(Glycine max L. Merril) of Kaba VarietyThis study aim was to determine the effect of plant spacing and NPK fertilizer application on thegrowth and yield of soybean of Kaba variety. The experiment was conducted in the field of theUPTD Balai Pengembangan Benih Palawija (BPBP), Plumbon Sub district, Cirebon District, WestJava from April to July 2014. The experimental method used was an experimental method withRandomized Block Design (RAK) with factorial arrangement of two treatment factors that wasrepeated three times. The first factor was the plant spacing consisted of three levels of 40x10, 40x15and 40x20 cm of plant spacing, while the second factor was the dose of NPK fertilizer whichconsisted of four levels of 200, 250, 300 and 350 kg/ha. Result showed that there was interactionbetween plant spacing and dose of NPK fertilizer to the average of leaf area index of soybean Kabavariety at the age of 21 days after planting. The treatment of Phonska NPK fertilizer in the dose of350 kg/ha gave the best soybean production of 1.44 kg/plot or the equivalent of 1.91 tons/ha(assuming of effective land conversion of 80%/ha), while the plant spacing did not show anysignificant effects the soybean production.Keywords: soybean, plant spacing, NPK fertilizerABSTRAKPenelitian ini bertujuan untuk mengetahui pengaruh jarak tanam dan aplikasi pupuk NPK terhadappertumbuhan dan hasil tanaman kedelai (Glycine max) varietas Kaba. Penelitian dilaksanakan dilahan di UPTD Balai Pengembangan Benih Palawija (BPBP), Plumbon, Cirebon, Jawa Barat daribulan April sampai dengan Juli 2014. Metode percobaan yang digunakan yaitu metode eksperimendengan Rancangan Acak Kelompok (RAK) pola faktorial dengan perlakuan terdiri dari dua faktoryang diulang tiga kali. Faktor yang pertama adalah jarak tanam yang terdiri dari tiga taraf yaitu40x10, 40x15 dan 40x20 cm, sedangkan faktor yang kedua adalah dosis pupuk NPK yang terdiri dariempat taraf yaitu 200, 250, 300 dan 350 kg/ha. Hasil penelitian menunjukkan adanya interaksiantara jarak tanam dan dosis pupuk NPK terhadap rata-rata indeks luas daun tanaman kedelaivarietas Kaba pada umur 21 hari setelah tanam. Dosis pupuk NPK Phonska 350 kg/hamenghasilkan produksi terbaik sebanyak 1,44 kg/petak atau setara dengan 1,91 ton/ha (asumsikonfersi lahan efektif 80%/ha), sedangkan jarak tanam pada perlakuan tidak menunjukkan adanyapengaruh nyata terhadap produksi kedelai.Kata kunci: kedelai, jarak tanam, pupuk NPK

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Response of Nitrogen and Phosphorus Fertilizer and Plant Spacing on Growth and Yield Contributing Character of Sunflower

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v41i1.258 ◽

1970 ◽

Vol 41 (1) ◽

pp. 33-40 ◽

Cited By ~ 1

Author(s):

AA Jahangir ◽

RK Mondal ◽

Katrun Nada ◽

Sadia Afoze ◽

MA Hakim

Keyword(s):

Seed Yield ◽

Block Design ◽

Growth And Yield ◽

Plant Spacing ◽

Phosphorus Fertilizer ◽

Nitrogen And Phosphorus ◽

Head Diameter ◽

Randomized Block Design ◽

Plot Yield ◽

Number Of Seeds

The plant spacing of 20, 25 and 30 cm were used for the study. The doses of nitrogen and phosphorus were 80, 100, 120 and 45, 60, 75 kg/hectare respectively. The experiment was carried out in a randomized block design with three replications. 20 cm plant spacing produced the highest plot yield. Maximum number of seeds per head and yield were produced by the application of 120 kg N + 75 kg P2O5 per hectare. In case of plant spacing x fertilizer interaction effect, 20 cm plant spacing with 120 kg N + 75 kg P2O5 per hectare treatment produced the highest head diameter and seed yield. Bangladesh J. Sci. Ind. Res. 41(1-2), 33-40, 2006

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Pertumbuhan dan Hasil Kedelai (Glycine Max L. Merril) pada Beberapa Jarak Tanam Jagung dalam Sistem Tumpang Sari

Agrotek ◽

10.30862/agt.v2i6.536 ◽

2018 ◽

Vol 2 (6) ◽

Author(s):

Liz Yanti Andriyani ◽

Mukhsin Mukshin ◽

Wika Anriya Darma

Keyword(s):

Block Design ◽

Dry Weight ◽

Growth And Yield ◽

Soybean Plant ◽

Plant Spacing ◽

Land Equivalent Ratio ◽

Soybean Yield ◽

Experimental Station ◽

Randomized Complete Block Design ◽

Glycine Max L

The objective of the experiment was to observe the best plant spacing of corn to increase the growth and yield of soybean under intercropping system. The experiment was conducted from December 2008 to March 2009 at Jambi University� experimental station. The experimental design was randomized complete block design� with four replications. These treatments were intercropping corn and soybean� with plant spacing of corn : 75 cm x 25 cm, 75 cm x 50 cm, 100 cm x 25 cm, 100 cm x 50 cm, 150 cm x 25 cm and 150 cm x 50 cm. The results showed that the plant spacing of corn under intercropping system affected the height of� soybean, yield of soybean, yield of corn and Land Equivalent Ratio (LER), but did not� affect the� dry weight of the upper part of soybean plant,� number of� pods per soybean plant, number of filled pods per soybean plant, 100� grains weight of soybean and 1000 grains weight of corn. The plant spacing of corn 75 cm x 25 cm under intercropping system produced better growth and yield of soybean than the other treatments with LER at 1,454.

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GROWTH AND YIELD EVALUATION OF MUSTARD VARIETIES GROWN IN A MEDIUM HIGHLAND OF KHULNA REGION

Khulna University Studies ◽

10.53808/kus.2021.18.1.1811-l ◽

2021 ◽

Vol 18 (1) ◽

pp. 1-8

Keyword(s):

Seed Weight ◽

Harvest Index ◽

Block Design ◽

Growth Yield ◽

Growth And Yield ◽

Rabi Season ◽

Yield Attributes ◽

Randomized Complete Block Design ◽

Stover Yield ◽

Number Of Seeds

The present research was conducted at the experimental field of Agrotechnology Discipline, Khulna University, Khulna during Rabi season 2016-17 to investigate the growth and yield performance of mustard varieties. The experiment was arranged in a randomized complete block design consisting of eight mustard varieties (viz. BARI Sarisha-8, BARI Sarisha-11, BARI Sarisha-13, BARI Sarisha-14, BARI Sarisha-15, BARI Sarisha-16, Rai and Tori-7) as treatment and replicated thrice. All the growth, yield attributes and yield were substantially influence among the mustard varieties except the phenological parameters. Results of the experiment showed that the highest plant height (131.33 cm), seed yield (1813.33 kg ha-1) and stover yield (3876.67 kg ha-1) were found in BARI Sarisha-16. BARI Sarisha-11 was found better in respect of maximum siliqua plant-1, weight of seeds plant-1, 1000-seed weight and harvest index. Besides this, BARI Sarisha-14 showed the maximum number of seeds siliqua-1. Therefore, findings of this study suggested that BARI Sarisha-16 would be suitable for better productivity and recommended for cultivation in the medium highland of Khulna region of Bangladesh.

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Effect of different application forms of efficient microorganisms on the agricultural productive of two bean cultivars

Revista Facultad Nacional de Agronomía Medellín ◽

10.15446/rfnam.v72n3.76272 ◽

2019 ◽

Vol 72 (3) ◽

pp. 8927-8935 ◽

Cited By ~ 3

Author(s):

Alexander Calero Hurtado ◽

Yanery Pérez Díaz ◽

Dilier Olivera Viciedo ◽

Elieni Quintero Rodríguez ◽

Kolima Peña Calzada ◽

...

Keyword(s):

Plant Growth ◽

Block Design ◽

Growth And Yield ◽

Control Soil ◽

Soil Inoculation ◽

Randomized Block Design ◽

Two Factors ◽

Number Of Leaves ◽

The Common ◽

Number Of Seeds

The use of Efficient Microorganisms (EM) can be an effective alternative to improve plant growth and yield in the bean cultivation. Therefore, different forms of application of efficient microorganisms were evaluated in the production of two cultivars of the common bean from November of 2013 to March of 2014. Two factors were studied; the first one was comprised of the two cultivars, Velazco Largo (VL) and Cuba Cueto (CC-25-9-N). The second factor consisted of four treatments with EM; without EM (control), soil inoculation (100 mL L-1), foliage applications (100 mL L-1), and the combined soil inoculation (100 mL L-1) plus foliar applications (100 mL L-1). The experiment was carried out in a randomized block design, in factorial outline 2×4, with three repetitions. The agronomic indicators were evaluated as the number of leaves per plant, the height of plants, number of pods per plant, number of seeds per pod, the mass of 100 seeds (g) and the yield (t ha-1). The results showed that the different forms of application of efficient microorganisms stimulated the agronomic indicators evaluated in both crops. The associated applications between the inoculation of the soil and foliage applications of efficient microorganisms provided better results, producing increments in the yield of 1.13 t ha-1 in VL and 2.15 t ha-1 in CC-25-9-N.

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RESPON HASIL TANAMAN SORGUM (Sorghum bicolor L. Moench) TERHADAP PUPUK ORGANIK CAIR DAN JARAK TANAM DI JATINANGOR JAWA BARAT

Agrin ◽

10.20884/1.agrin.2018.22.2.464 ◽

2019 ◽

Vol 22 (2) ◽

pp. 160

Author(s):

Ruminta Ruminta ◽

Agus Wahyudin ◽

Aditya Ramdani

Keyword(s):

Sorghum Bicolor ◽

Harvest Index ◽

Block Design ◽

Organic Fertilizer ◽

Growth And Yield ◽

Plant Spacing ◽

Climate Type ◽

Field Station ◽

Single Effect ◽

Sorghum Bicolor L

Tujuan penelitian adalah mempelajari pengaruh interaksi antara dosis pupuk organik cair dan jarak tanamterhadap pertumbuhan dan hasil tanaman sorgum (Sorghum bicolor L. Moench). Penelitian dilakukan di StasiunLapangan Fakultas Pertanian, Universitas Padjadjaran, Jatinangor Jawa Barat. Lokasi ini memiliki ketinggiansekitar 760 meter di atas permukaan laut, tipe tanah inseptisol dan tipe iklim Oldeman C3 pada tahun 2012.Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan pola faktorial, dua faktor perlakuan dantiga ulangan. Faktor pertama adalah dosis pupuk organik cair yang terdiri dari tiga taraf: 1,5 l / ha; 3 l / ha; dan 6l / ha. Faktor kedua adalah jarak tanam yang terdiri dari tiga taraf: 25 cm x 25 cm; 50 cm x 25 cm; dan 75 cm x 25cm. Pengamatan terdiri dari komponen hasil dan hasil tanaman sorgum. Hasil penelitian ini menunjukkan bahwaantara jarak tanam dan dosis pupuk cair memberikan efek interaksi terhadap berat malai sorgum. Perlakuan pupukorganik cair dengan dosis 6 l / ha dan jarak tanam pada level 50 cm x 25 cm memberikan efek terbaik terhadapberat malai sorgum (94,90 g). Pengaruh mandiri jarak tanam pada level 50 cm x 25 cm memberikan hasil terbaikterhadap bobot biji per tanaman (71,31 g). Perlakuan pupuk organik cair dan jarak tanam memberikan efek yangsama terhadap panjang malai, berat 1000 butir, persentase bobot biji per tanaman, indeks panen, dan hasil perlahan.Kata kunci: pupuk organik cair, jarak tanam, hasil, sorgumABSTRACTThe objective of research was to study the effect of interaction between dosage of liquid organic fertilizerand plant spacing on growth and yield of Sorghum (Sorghum bicolor L. Moench). Research was carried out atAgriculture Faculty Field Station, Padjadjaran University, Jatinangor West Java. The site has an altitude about760 meter above sea level, inceptisols soil type and C3 climate type of Oldeman in 2012. The experiment used aRandomized Block Design (RBD) with factorial pattern, two factor of treatment and three replications. The Firstfactor was dosage of liquid organic fertilizer which consist of three levels: 1,5 l/ha; 3 l/ha; dan 6 l/ha. The Secondfactor was plant spacing consist of three levels: 25 cm x 25 cm; 50 cm x 25 cm; and 75 cm x 25 cm. Observationsconsist of components of yield and yield of sorghum plants. The results of this experiment showed that betweenplant spacing and dosage of liquid fertilizer give an interaction effect to panicle weight of sorghum. Treatment ofliquid organic fertilizer at dosage 6 l/ha and plant spacing at level 50 cm x 25 cm gave the best effects on panicleweight sorgum (94,90 g). Single effect treatment of plant spacing at level 50 cm x 25 cm gave the best result tograin weight per plant (71,31 g). Treatment of liquid organic fertilizer and plant spacing give the same effect topanicle length, weight of 1000 grain, percentage of kernels weight per plant, harvest index, and yield per field.Key words: liquid organic fertilizer, plant space, yield, sorgum

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KETAHANAN BEBERAPA AKSESI KAPAS TERHADAP HAMA PENGISAP DAUN Amrasca biguttula (ISHIDA)

Jurnal Penelitian Tanaman Industri ◽

10.21082/jlittri.v13n3.2007.81-87 ◽

2020 ◽

Vol 13 (3) ◽

pp. 81

Author(s):

I G.A.A. INDRAYANI ◽

SIWI SUMARTINI ◽

B. HELIYANTO B. HELIYANTO

Keyword(s):

Gossypium Hirsutum ◽

Chemical Control ◽

Block Design ◽

Insect Pest ◽

Resistant Variety ◽

Plant Spacing ◽

Experimental Station ◽

Randomized Block Design ◽

Mental Problems ◽

Moderately Resistant

ABSTRAK Amrasca biguttula (Ishida) adalah serangga hama pengisap daun yang sangat potensial menurunkan produktivitas kapas. Pengendaliannya secara kimiawi menimbulkan banyak masalah lingkungan, seperti pencemaran dan peningkatan resistensi hama terhadap insektisida kimia sintetis. Salah satu solusi dalam masalah tersebut adalah penggunaan varietas tahan (resisten) yang juga merupakan bagian dari pengendalian hama terpadu (PHT) pada kapas. Penelitian ketahanan beberapa aksesi kapas terhadap A. biguttula (Ishida) dilakukan di Kebun Percobaan Balai Penelitian Tanaman Tembakau dan Serat di Asembagus, Situbondo, mulai Januari hingga Desember 2006. Tujuannya adalah untuk mengetahui ketahanan beberapa aksesi kapas terhadap serangan hama pengisap daun, A. biguttula. Sebagai perlakuan adalah 30 aksesi kapas yang ditanam dalam plot berukuran 10 m x 3 m, dengan jarak tanam 100 cm x 25 cm, satu tanaman per lobang. Setiap aksesi disusun dalam rancangan acak kelompok dengan tiga kali ulangan. Parameter yang diamati adalah jumlah nimfa A. biguttula per daun, jumlah bulu daun per cm 2 luas daun, dan posisi bulu terhadap lamina (tegak/rebah), serta skor kerusakan tanaman. Hasil penelitian menunjukkan bahwa setiap aksesi kapas berpotensi terserang A. biguttula, meskipun tingkat populasi hama ini tidak menunjukkan perbedaan nyata antar aksesi. Terjadi korelasi negatif (R 2 = 0,2425) antara jumlah bulu daun dan populasi nimfa A. biguttula dan antara jumlah bulu daun dan skor kerusakan tanaman (R 2 = 0,2027). Berdasarkan jumlah bulu daun, aksesi kapas yang termasuk kategori sedikit berbulu dengan kriteria ketahanan sedikit tahan adalah: AC 134, Stoneville 7, Fai Nai, SHR, CRDI-1, Kanesia 5, Kanesia 8, dan Kanesia 9. Sedangkan aksesi lainnya termasuk kategori tidak berbulu dan peka terhadap serangan A. biguttula. Kata kunci : Kapas, Gossypium hirsutum, aksesi, hama, Amrasca biguttula (Ishida), toleran, peka, kerusakan, Jawa Timur ABSTRACT Resistance of several cotton accessions to sucking insect pest, Amrasca biguttula (Ishida) Amrasca biguttula (Ishida) is a sucking insect pest which potentially reduces cotton productivity. Its chemical control often cause environ- mental problems mainly air pollution and increase of pest resistance to certain chemical insecticides. One solution can be used to solve these problems is by using resistant variety that is also an integral part of the integrated pest management (IPM). Study on the resistance of several cotton accessions to sucking insect pest, Amrasca biguttula (Ishida) was conducted at the Experimental Station of the Indonesian Tobacco and Fiber Crops Research Institute (IToFCRI) in Asembagus, Situbondo, East Java, from January to December 2006. The objective of the study was to find out the resistance of cotton accessions to sucking insect pest. Thirty accessions of cotton were used as treatment and were planted in plots 10 m x 3 m with plant spacing 100 cm x 25 cm, one plant per hole. Each accession was arranged in a randomized block design with three replications. Parameters observed were number of nymph of A. biguttula, number of leaf hair, leaf hairs position (erect or lie down), and score of damage. The result showed that every accession of cotton can be attacked by A. biguttula although the insect population was not significantly different among accessions. There is negative correlation (R 2 = 0.2425) between number of leaf hair and population of A. biguttula and between number of leaf hair and score of plant damage (R 2 = 0.2027). Accessions that categorized as lightly hairy and moderately resistant to A. biguttula were AC 134, Stoneville 7, Fai Nai, SHR, CRDI-1, Kanesia 5, Kanesia 8, and Kanesia 9, while the others were categorized as glabrous and susceptible to the sucking pest. Key words: Cotton, Gossypium hirsutum, accession, insect pest, Amrasca biguttula (Ishida), tolerant, sensitive, damage, East Jav

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