scholarly journals Evaluation of Susceptibility of Some Sorghum (Sorghum bicolor L. Moench) to Stem Borers in Far North Region of Cameroon: A Case of Off Season Local Varieties

Author(s):  
Jacques Djodda ◽  
Elias Nukenine Nchiwan ◽  
Pierre Ngassam ◽  
Bouba Djilé

Introduction: Among cereals, Sorghum is the most consumed as food in the Far North of Cameroon. Muskuwari, which is an off season sorghum, plays a key role in the regulation of its availability. On the other hand, stem borers (Sesamia cretica Lederer) constitute a major constraint, compromise its yield and reduce cereal supply. Despite this fact, ecological control measures to reduce losses are still little known. Objective: The present research aimed at evaluating the susceptibility of ten local varieties of Muskuwari against Lepidoptera stem borers in natural conditions. Place and Duration of Study: The study was conducted during the 2012 and 2013 agricultural campaign at Ngassa, a locality of Maroua. Methodology: Experimentation was carried out in a Completely Randomized Block design with tree replications. Ten local varieties were then under natural infestations. Degrees of infestation were estimated by visual observation and destructive methods. Each year, Seed losses in term of percentage of total harvest loosed, were estimated from 30 ears per variety randomly selected from infested and uninfected plants. Results: The results showed a large variation in agronomic performance depending on the parameters considered. Mandouéri, Bourgouri, Tchangalari and Soukatari with infestation rates ranging from 4% to 11% and seed losses ranging from 0.96% to 23.42% are more tolerant or less susceptible than other varieties while Safra’s varieties are always the most susceptible to stem borers with over to 40% seed loss. Conclusion: The study showed there are resistant or tolerant varieties of Muskuwari able to cope with the attacks of stem borers not exploited to mitigate damages. Degree of infestation, seed loss, number of caterpillars and gallery length per plant are suitable parameters for varietal screening of stem borer resistance. Since varietal resistance is an ecological and easily adoptable option, investigations that could lead to Muskuwari varietal improvement could boost cereal supplly in the Far North Region of Cameroon.

Author(s):  
Susilawati Astrodjojo ◽  
Suratman Sudjud ◽  
Sri Soenarsih DAS

Rice is an essential food crop besides corn and soybeans. The need for rice each year increases along with population growth. One of the pests affecting rice is the white rice stem borer. The present research aimed to test the effectiveness and to examine the interaction between plant age and the number of Tricogramma japonicum parasitoid. The research was carried out at the Agrotechnology Laboratory of the Faculty of Agriculture, Khairun University, Ternate, and the rice fields of Bumi Restu village SP I, East Wasile district. The research design operative was a randomized block design where factor A (A1 = 21 DAS, A2 = 42 DAS, A3 = 56 DAS) was the age of the plant, and factor B (B0 = 0, B1 = 50, B2 = 100, B3 = 150) was the number of eggs of Corcyra cephalonica. Biological control using different amounts of Trichogramma japonicum parasitoid led to different interactions and results for each tested parameter. For the number of egg groups, there was no interaction with plant age, but the treatments which were found effective in suppressing stem borer populations were B2 and B3 (100 and 150). The most effective pias as indicated by damage intensity parameter was B3 (150), which was applied to plants aged 21 DAP. Furthermore, for plant height, different number of parasitoids poses significantly effective results. Percentage unhulled grain of pias B3 (150) causes insignificant damage. For production there is no interaction with plant age, but pias B2 (100) shows high yield. The conclusion is that pias B3 (150) applied to 21 days of plants is very effective in controlling white rice stem borer.


2019 ◽  
Vol 23 (2) ◽  
pp. 219
Author(s):  
Yhone Arialistya ◽  
Suputa Suputa ◽  
Y. Andi Trisyono ◽  
Eka Firmansyah

The yellow rice stem borer (Scirpophaga incertulas Walker) is a major pests on rice. Light traps have been used for monitoring and controlling S. incertulas with white and ultraviolet color light sources. The purpose of this research was to invent trap which uses an effective color that attracts S. incertulas. This research begins by sampling female S. incertulas pre-oviposition from the field then tested in the laboratory. The experiment was designed with factorial randomized block design with light colors and light intencity as factors. Light-emitting diodes used in this research, consisted of normal red, normal yellow, normal green, superbright red, superbright yellow, superbright green, superbright blue, UV, and white. LED white, UV, and superbright blue were attractive colors to S. incertulas  when exposure time was 15 minutes. Effective light intencity to attract S. incertulas was 1000 lux.


HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 547C-547
Author(s):  
A Talaie ◽  
M.R. Nejatie

This work was conducted for the purpose of propagation of hazelnut cuttings, using hard-, semi-hard-, and softwood cuttings produced from 1-year-old suckers of local varieties of hazelnuts from the Alamout-Qazvin area of Iran. The research was carried out in a greenhouse with a mist system at the Faculty of Agriculture of Tarbiat Modarres University. This experiment was based on the complete randomized-block design with a factorial framework and resulted in two levels of 5% + 1% according to the Duncan test. The effect of rooting media (sand and pumice), cutting type (hard-, semi-hard-, and softwood), and use of a hormone with five concentrations (control, 1500, 3000, 4500, and 6000 ppm IBA) were investigated. The cuttings, being wounded and treated with hormones on certain beds, were kept in a greenhouse with a mist system. After 4 months, the number of rooted cuttings, mean number of roots per rooted cuttings, total length of roots, mean length of one root, average of dry weights, and average of young shoots were evaluated. The results indicate that the rooting medium and hormone are considerably effective for rooting of the cuttings and is considered as a significant facture. The general conclusion is that the most favorable result is reached with pumice and 4500 ppp IBA. The interaction between rooting medium and hormone on the rooting process was significant, and finally, it was found that there is not a significant relation between callusing and rooting in hazelnut. Also, the wounding is an effective factor for rooting of hazelnut cuttings.


2019 ◽  
Vol 4 (02) ◽  
pp. 195-198
Author(s):  
Rajendra Singh ◽  
Amit Rana ◽  
S. K. Sachan ◽  
D. V. Singh ◽  
Vivek . ◽  
...  

The present investigation was carried out to study the “Eco friendly management of yellow stem borer, Scirpophaga incertulas (Walker) on paddy in western plain zone of Uttar Pradesh” in randomized block design with three replications and seven treatments at Crop Research Center, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut. The yellow stem borer, S. incertulas (Walker) was recorded as major pest. The incidence of S. incertulas (Walker) was recorded on the incidence of yellow stem borer Scirpophaga incertulas (Walker) showed that it was recorded on 26th standard week for the first time and continued till second week of November i.e. 46th standard week. The infestation of stem borer recorded as dead heart/ white ear head ranged from 0.85 to 15.25 per cent during the crop season i.e. Kharif 2017 and positive correlated with all the other weather parameters.


2019 ◽  
Vol 45 (2) ◽  
pp. 146-156
Author(s):  
Leila Luci Dinardo-Miranda ◽  
Juliano Vilela Fracasso ◽  
Isabella Dinardo Miranda

ABSTRACT Nematodes are important parasites of sugarcane, significantly reducing the yield and the longevity of the crop. Damage caused by them varies with the susceptibility of sugarcane cultivars; thus, it is important for growers to learn the reaction of new genotypes in order to better direct control measures. The objective of this study was to evaluate the damage caused by nematodes to cultivars newly released for commercial planting. Two experiments were conducted in fields infested by Meloidogyne javanica and Pratylenchus zeae. Both experiments were arranged in split-plot randomized block design. The cultivars were planted in the plots, and two carbofuran 350SC levels, 0 and 7 L ha-1, were applied on two subplots (treated and non-treated subplots). On average, the subplots treated with the nematicide had their yield increased by 10%, compared to non-treated subplots, suggesting that nematodes reduced the yield of cultivars by at least 10%, but such a reduction reached 22% for cultivar IACSP97-7569 in experiment 1 and 17% for CTC20 in experiment 2. Damage was insignificant for cultivars CTC9001, CTC9002, IACSP93-3046, IACSP95-5094, IACSP96-3060, IACSP97-4039 and RB975952 in experiment 1 and for cultivars IACSP97-4039, RB867515 and RB966928 in experiment 2. These cultivars can be considered tolerant to hpsMhpshps. javanicahps andhps P. zeae.hps


2016 ◽  
Vol 21 (2) ◽  
pp. 152
Author(s):  
Hanudin ◽  
Waqiah Nuryani ◽  
Evi Silvia Yusuf ◽  
Budi Marwoto

Anyelir (Dianthus caryophillus  L.) merupakan salah satu jenis tanaman hias yang mempunyai nilai ekonomi tinggi. Penyakit utama yang menyerang tanaman ini ialah layu Fusarium yang disebabkan oleh Fusarium oxysporum f. sp. dianthi dapat menurunkan kualitas dan kuantitas produksi tanaman sekitar 20-60%.  Pengendalian yang selama ini dilakukan oleh petani bertumpu pada penggunaan  pestisida kimia sintetik. Namun penggunaan bahan kimia tersebut tidak mampu mengeradikasi patogen secara sempurna, terutama pada lapisan tanah yang agak dalam. Salah satu cara pengendalian berwawasan lingkungan ialah menggunakan musuh alami.  Penelitian ini dilaksanakan di Laboratorium dan Rumah Kaca Balai Penelitian Tanaman Hias (1.100 m dpl.), sejak Mei sampai Desember 2009. Penelitian bertujuan mengetahui pengaruh Bacillus subtilis dan Pseudomonas  fluorescens yang diformulasi dalam bentuk biopestisida organik cair dalam pengendalian layu Fusarium pada tanaman anyelir. Rancangan yang digunakan ialah acak  kelompok dengan 10 perlakuan, yaitu 10% ekstrak kascing + 10% molase + B. subtilils + P. fluarescens (BP) dan 10% ekstrak pupuk kandang kuda + 10% molase + BP masing-masing konsentrasi 0,1, 0,3, 0,5, dan 0,7%, dazomet 0,2%, serta kontrol (air ledeng), dengan empat ulangan. Hasil penelitian menunjukkan bahwa populasi bakteri antagonis setelah dilakukan proses fermentasi selama 3 minggu,  meningkat dibandingkan sebelum fermentasi.  Rerata populasi awal sebelum fermentasi bakteri antagonis  107-109 cfu/ml meningkat menjadi 1010-1012 cfu/ml pada 3 minggu setelah fermentasi. Populasi kedua agens biokontrol tersebut setelah penyimpanan selama 2 bulan cenderung stabil berkisar antara 1010-1011 cfu/ml.  Perlakuan B. subtilis dan P. fluorescens  yang disuspensikan ke dalam ekstrak kascing + molase pada taraf konsentrasi 0,5% kemudian difermentasikan dalam biofermentor selama 3 minggu secara konsisten dapat menekan serangan F. oxysporum f. sp. dianthi pada anyelir. Implikasi hasil penelitian ini dapat meningkatkan daya saing komoditas tanaman hias melalui pemanfaatan sumber daya alam nasional secara optimal berkelanjutan untuk mendukung industri tanaman hias yang berdaya saing tinggi.<br /><br />Carnation (Dianthus caryophillus  L.) is one of the most economically important cut flowers in Indonesia. The crops is commonly cultivated in the highland areas of the country. Cultivations of the crops in the production center areas have faced various problems, especially wilt disease caused by Fusarium oxysporum  f. sp. dianthi as the most important one. Based on the field observation it is known that the disease could reduce plant production and its yield quality up to 20-60%. To control the disease, farmers usually use a synthetic chemical pesticides.  However the control measures are not sufficiently effective to overcome the diseases problems.  Therefore, an alternative control measures which are more environmentally friendly is necessary. The use of biocontrol agents is nowdays bring popular to be recommended to  control the disease.  A study on the control of fusarial wilt disease on carnation was carried out  in the Laboratory and Glasshouse of Indonesian Ornamental Crops Research Institute (1,100 m asl.) from May to December 2009, using Bacillus subtilis and Pseudomonas  fluorescens  formulated in the liquid organic pesticide.  The study was arranged in a randomized block design, with 10 treatments i.e. 10% vermi compost + 10% molase + BP and 10% horse manure + 10% molase + BP consentration 0.1, 0.3, 0.5, 0.7% resfectively, dazomet 0,2% and control with four replications. The results showed that population of antagonistic bacterial was increased from  107-109  to 1010-1012 cfu/ml  after 3 weeks fermentation in the organic carrier.  The population of two antagonistic bacteria  was likely stable on 1010-1011 cfu/ml after storing 2 months. The treatments of B. subtilis and P.  fluorescens suspended in the vermi compost extract and molases on the concentration level of  0.5% and formulated in the biofermentor for 3 weeks  were consistenly effective in reducing Fusarium wilt on carnation. The implication of research results could be increase commodity competitive ability of ornamental plants by using national nature resource on a continuity for support the ornamental plants industry with high competitiveness.<br /><br />


2021 ◽  
Vol 36 (2) ◽  
pp. 379
Author(s):  
Tri Mulya Hartati ◽  
Chumidach Roini ◽  
Indah Rodianawati

Cassava is one of the local food sources that are widely available in almost every region. Cuttings are used to plant cassava, and these cuttings will produce a number of roots and buds. The main purpose of this study was to evaluate the effect of cuttings slices model and the number of buds on the growth of Tobelo local varieties of cassava. This study employed a factorial Randomized Block Design (RBD), with the cuttings slices model as the first factor, consisting of three levels, namely: flat slice, one-sided slice and two-sided slice. The second factor is the number of buds, which is divided into three levels, 1 bud, 2 buds and 3 buds. The observation parameters in this study include plant height, number of leaves, stem diameter and leaf area. The results have revealed that the model of two-sided sliced cuttings combined with the number of one bud is the most effective treatment in improving the growth of cassava plants of Tobelo local varieties. The models of one-sided and two-sided oblique cuttings slices yield the highest average value for the parameters of plant height, stem diameter and leaf area, while the treatment with one bud tends to give the best results for the growth parameters.


2011 ◽  
Vol 21 (4) ◽  
pp. 338
Author(s):  
Wakiah Nuryani ◽  
Evi Silfia Yusuf ◽  
Hanudin ◽  
Ika Djatnika ◽  
Budi Marwoto

Lili merupakan tanaman hias penting dan bernilai ekonomi tinggi. Budidaya lili di Indonesia menghadapi kendala utama yaitu penyakit layu Fusarium. Aplikasi bahan kimia sintetik untuk mengendalikan penyakit ini berdampak negatif terhadap kerusakan lingkungan. Aplikasi organisme antagonis dan kultivar resisten merupakan alternatif pengendalian penyakit ramah lingkungan, berdampak positif terhadap kelestariannya, dan meningkatkan produktivitas lili. Penelitian bertujuan untuk mendapatkan informasi mikrobe antagonis, mikrobe nonpatogenik, dan klon lili yang dapat menekan penyakit  layu Fusarium. Penelitian dilakukan di Laboratorium Biokontrol dan Rumah Sere, Balai Penelitian Tanaman Hias pada bulan Januari sampai dengan Desember 2007. Tata letak percobaan disusun berdasarkan rancangan acak kelompok pola faktorial denga tiga ulangan. Faktor pertama ialah klon lili yang terdiri dari klon No.1, No 2, No.3 (tahan), dan No.4 (rentan). Faktor kedua ialah perlakuan mikrobe antagonis (1) Gliocladium sp. 107 spora/ml, (2). Trichoderma sp. 107 sel/ml, (3) Fusarium a virulen 107 spora/ml dan, (4) kontrol (tanpa mikrobe antagonis). Hasil percobaan menunjukkan bahwa penggunaan mikrobe antagonis Gliocladium sp. dan klon resisten paling efektif mengendalikan penyakit busuk umbi Fusarium pada lili. Hal ini dibuktikan dari persentase tanaman layu pada perlakuan aplikasi mikrobe dan penggunaan tanaman resistant dibandingkan dengan tanpa perlakuan. Penanaman tanaman resisten diikuti dengan aplikasi Gliocladium paling efektif menekan layu Fusarium dibanding perlakuan lainnya.<br /><br /><br /><br />Lilium is one of  the most important and the heigest economic value of cut flower in Indonesia. Cultivation of Lilium faces major constrain, that is wilt disease caused by Fusarium. Application of synthetic chemicals to control the diseases is not recommended, because its impact is dangerous for environment and human life. Therefore other control measures that are move environmentally friendly and more effective/efficient have to applied. The use of antagonistic microbes and resistance varieties are the most promising control measures to be recommended in the field. The study was aimed to find out of antagonist and nonpathogenic microbes and plant resistant that were effective to control Fusarium bulb rot on lili.  The experiment was conducted at Laboratory and Glasshouse of Indonesian Ornamental Crops Research Institute (1,100 m asl.) on January to December 2007. Factorial experiment was arranged in a randomized block design with three replications. The first factor was Lilium clones i.e. No.1, No. 2, No. 3 (resistant), and No. 4 (susceptible clone as control). The second factor was antagonism microbes i.e. (1) Gliocladium sp. 107 spora/ml, (2). 107 Trichoderma sp. cel/ml, (3) Fusarium nonpathogenic 107 spora/ml, and (4) control (tap water without antagonist microbe). The results indicated that the use of Gliocladium sp. and resistant clone of Lilium i.e. clone No.3 was effective to control Fusarium bulb rot of Lilium. This proven from lower percentage of disease occurance on the treatment of antagonistics microbes and resistance varieties compared both to those of without treatment (control). The use of resistance plant followed by application of Gliocladium was known to be most effective to control fusarial wilt disease compared to the other treatment combinations.   <br /><br />


2020 ◽  
Vol 3 (3a) ◽  
pp. 85-92
Author(s):  
HM Ati

The success of Sorghum varieties introduced to a location is tightly linked to the uses, environmental condition and farmers’ preferences. Also, grain and stover quality needs special attention to enhance the market value. The farmers in Turare village are predominantly sorghum and millet farmers. They cultivate the same varieties of sorghum which are low yielding land races. Experiments were conducted in 2017 and 2018, nine varieties of sorghum were planted in the Agroforestry farm layout of Federal University Dutsin-Ma with the aim of determining the varieties that are high yielding, early and farmers’ preference varieties so that the varieties that are high yielding and preferred by farmers can be multiplied and distributed to the farmers. Four landraces from the local community and five hybrids from Institute for Agricultural Research, Ahmadu Bello University Zaria were used for the study. Complete Randomized Block Design was used for experimental design and the Sorghum varieties were allocated to plots using Random Table Number. In both years, the farmers (male and female) preferred Samsurg 45 and 46 because of their earliness and high yield. Also, the local varieties, Maibakincona and Yargidanwudu have high performance in both years. CSR01 and CSR02, Zago and Jandawa performed poorly in yield and are late varieties. Though Samsorg 40 had high yield but not as high as Samsorg 45, 46, Maibakincona and Yargidanwudu. The study concludes that Samsorg 45 and 46 have a better attribute of early maturity and yield. Also, the local varieties, Maibakincona and Yargidanwudu have high performance in both years and can be improved upon in terms of yield and earliness. This research was conducted in order to compare the performance of the hybrids varieties with the local varieties that the farmers are used to in the area so as to advise the local farmers to use the varieties with the highest performance. This will relatively translate to higher income for the farmers.


2016 ◽  
Vol 35 (2) ◽  
pp. 141
Author(s):  
Sheny Sandra Kaihatu ◽  
Marietje Pesireron

Maize has an important role in the national economy, but at some area, including in Maluku, the productivity is still low, below its potential productivity. The productivity of maize could be improved by planting high yielding and adaptive variety to the local environment. Study was conducted in the Haruru village, District Amahai, Central Maluku, from March to August 2012 aimed to identify maize varieties adaptive on dry land agro ecosystem. The study used randomized block design, replicated three times, where farmers’ fields were used as replications. The varieties tested were Srikandi Kuning, Gumarang, and Sukmaraga composites varieties. Bima-2 and Bima-2 (hybrid varieties) and Mutiara, Ungu Hati Putih, Merah, Orange Hati Putih, and Orange Hati Merah (local variety, obtained from farmers’ fields in the district of MTB). Fertilizers were drilled, 5-7 cm on the side of plant at a rate of 135 kg N, 90 kg P2O5, 60 kg K2O and 1-2 t manure/ha. Variables to be measured were percentage of surviving plants, age at 50% of male flowering, age at 50% of female flowering, plant height, ear height, cob length, cob weight, cob diameter, number of rows/ear, seed number per ear row, 100-seed weight, weight of dry grains, moisture content, and grain yield. Results showed that local varieties indicated a better growth, but grain yield were superior for the hybrid and the composite varieties. Bima-4 hybrid variety produced 10.31 t/ha dry grain, followed by Bima-2 hybrid and the composite varieties of Sukmaraga, Srikandi Kuning, and Gumarang, each was 8.70 t/ha, 7.97 t/ha, 7.60 t/ha and 7.26 t/ha, respectively. Local varieties Mutiara, Orange Hati Putih, Merah, Orange Hati Merah, and Ungu Hati Putih each yielded only 3.74 t/ha, 3.32 t/ha, 3.07 t/ha, 3.02 t/ha and 2.45 t/ha respectively.


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