scholarly journals Comparative effect of different insecticides on the growth and yield of soybeans

2020 ◽  
Vol 56 (No. 3) ◽  
pp. 206-213
Author(s):  
Sanjeev Kumar Dhungana ◽  
Bishnu Adhikari ◽  
Arjun Adhikari ◽  
Il-Doo Kim ◽  
Jeong-Ho Kim ◽  
...  

The yield of soybeans, an economically important crop worldwide, is substantially reduced by different abiotic and biotic factors, including insect pests. Different insecticides are applied to control soybean insect pests. The application of insecticides may also affect the plants along with the pests. The effects of four insecticides (fenitrothion, etofenprox, thiamethoxam, and lambda-cyhalothrin-cum-thiamethoxam; LT) on the growth and yield of two soybean cultivars over two years were investigated. The plant height (PH), pod number, shoot dry matter without seed (SDWS), total shoot dry matter, seed yield per plant (SYP), harvest index (HI), and hundred-seed weight significantly varied with the insecticides. However, the primary branch number was not significantly affected by the insecticides. Significant interactions between the year and insecticide, except for the SDWS and HI, indicated that the growing environment also affected the influence of the insecticides. The PH was significantly tall in the thiamethoxam (50.07 cm) and short for the LT (46.66 cm) application. The SYP was significantly high for the LT (20.51 g) and low for the fenitrothion (11.51 g). This study showed that the type of insecticide could significantly affect the plant growth and yield of the soybean.

2020 ◽  
Vol 5 (2) ◽  
pp. 111-120
Author(s):  
Toto Rafiko Samra ◽  
Syamsuddin Syamsuddin ◽  
Syafruddin Syafruddin

Abstrak Untuk menganalisa dosis mikoriza dan beberapa varietas perlu dilakukan penelitian terhadap pertumbuhan dan hasil kedelai yang ditanam. Adapun penelitian ini diadakan di kebun percobaan, Fakultas Pertanian dan Laboratorium Biologi Tanah, Universitas Syiah Kuala, Banda Aceh. Penelitian dilaksanakan dari April - November 2019. Dipenelitian ini menggunakan Rancang yang diacak berkelompok pola faktorial memilik factor sebanyak 2 dan ulangan yang dibutuhkan sebanyak 3. Pertama yaitu faktor dosis pupuk mikoriza (D) terdiri dari 4 taraf yaitu D0 = 0 g dengan carier zeolit, D1 = 5 g dengan carier zeolit, D2 = 10 g dengan carier zeolit D3 = 15 g dengan carier zeolit. Faktor kedua yaitu beberapa varietas yang terdiri dari 3 taraf  yaitu V1 = Kipas Merah, V2 = Anjasmoro, V3 = Dering.  Sehingga didapatkan 12 kombinasi perlakuan dan percobaan terbagi dalam dua unit, sehingga terdapat 72 satuan unit percobaan. Adapun diamati meliputi umur berbunga (hari), tinggi tanaman (cm), jumlah cabang (cabang), jumlah cabang produktif (cabang), jumlah polong per tanaman (polong), jumlah polong bernas per tanaman (polong), jumlah bji per tanaman (biji), bobot biji per tanaman (g), bobot 100 biji per tanaman  (g) dan persentase akar terkolonisasi mikoriza (%). Hasil penelitian menunjukkan bahwa perlakuan dosis mikoriza berpengaruh sangat nyata pada paremeter persentase akar terkolonisasi mikoriza serta berpengaruh nyata pada parameter tinggi tanaman umur  21 , 28 dan 42 HST. Dosis mikoriza 10 g dengan carier zeolit menunjukkan nilai terbaik pada parameter tinggi tanaman 42 HST (51,67 cm), persentase akar terkolonisasi mikoriza (47,02 %). Dosis mikoriza 15 g dengan carier zeolit menunjukkan nilai terbaik pada parameter tinggi tanaman umur 21 HST (23,44 cm), 28 HST (28,78 cm). Perlakuan beberapa varietas berpengaruh sangat nyata pada parameter tinggi tanaman umur 21 HST, jumlah cabang umur 21, 28, 35, dan 42 HST, jumlah cabang produktif, bobot biji pertanaman, bobot 100 biji, serta berpengaruh nyata pada parameter tinggi tanaman umur  28 dan 35 HST. Varietas Anjasmoro menunjukkan nilai terbaik pada parameter tinggi tanaman umur 21 HST ( 23,75 cm), 28 HST (29,42 cm), 35 HST (36,42 cm), berat biji per tanaman (9,63 g) dan bobot 100 biji (14,73 g). Varietas Kipas Merah menunjukkan nilai terbaik pada parameter jumlah cabang umur 21 HST (4,58 cabang), 28 HST (5,25 cabang), 35 HST (5,58 cabang), 42 HST (5,92 cabang),  dan jumlah cabang  produktif (5,67 cabang). Terdapat interaksi yang nyata antara dosis mikoriza dan varietas terhadap parameter tinggi tanaman umur 21, 28, 35 HST dan jumlah polong bernas per tanaman. Perlakuan dosis mikoriza 15 g dengan carier zeolit dengan varietas Anjasmoro merupakan kombinasi perlakuan terbaik berdasarkan parameter tinggi tanaman umur 21 HST (28,33 cm), 28 HST (34,33 cm), dan 35 HST (42,00 cm).Effect of Mychorrhizal Doses and Type Glomus mossaea on the Growth and Yield of Several Soybean Varieties (Glycine max (L.) Merill)Abstract. The study aims to determine the effect of mychorrizal doses and several varieties on the growth and yield of soybean plants. The study was conducted at Experimental garden, Faculty of Agriculture and Soil Biology Laboratory, Syiah Kuala University, Banda Aceh. The research was conducted from April to November 2019. This study used a factorial randomized block design with 2 factors and 3 replications.the first factor is mychorryzal doses (D) consisting of four levels, namely D0 = 0 g with zeolit zeolit, D1 = 5 g with zeolit carier, D2 = 10 g with zeolite carier D3 = 15 g with zeolit carier. The second factor is several of variety (V) soybean with three levels, namely V1 = Kipas Merah, V2 = Anjasmoro, V3 = Dering. Thus there are 12 treatment combinations and the experiment is divided into 2 units, so that there are 72 of experimental units. The parameters observed were flowering age (day), plant height (cm) and number of branches (branch), number of productive branches (branch), number of plant pods (pod), number of pods contain (pod), number of plant beans (bean), plant beans weight (g), weight of 100 beans (g), and percentage of mychorrhizal colonized roots (%).The results of this study indicate that of mychorizzal doses has a very significant effect on the percentage of mychorrhizal colonized roots as well as a significant effect on plant height benchmarks aged 21, 28 and 42 DAP. Mychorizzal doses 10 g(zeolit)/plant shows the best value on plant height benchmarks aged 42 DAP (51.67 cm),  percentage of mychorrhizal colonized roots (47.02 %). Mychorizzal doses 15 g(zeolit)/plant shows the best value on plant height benchmarks aged 21 DAP (23.44 cm), 28 DAP (28.78 cm). The treatment of several varieties had very significant effects on plant height benchmarks aged 21 DAP, number of branches (branch) aged 21 DAP, 28 DAP, 35 DAP, and 42 DAP, number of productive branches (branch), plant beans weight (g), weight of 100 beans (g), as well as a significant effect on plant height benchmarks aged 28 and 35 DAP. Anjasmoro variety shows the best value on plant height benchmarks aged 21 DAP (23.75 cm), 28 DAP (29.42 cm), 35 DAP (36.42 cm), plant beans weight (9.63 g), weight of 100 beans (14.73 g). Kipas Merah variety shows the best value on number of branches benchmarks aged 21 DAP (4.58 branch), 28 HST (5,25 branch), 35 HST (5,58 branch), 42 HST (5,92 branch), and number of productive branches (5,67 branch). There is a real interaction between the mychorizzal doses and varieties of plant height bencmarks aged 21, 28, 35 HST and number of pods contain (pod). Treatment of mychorizzal doses 15 g(zeolit)/plant with Anjasmoro variety is the best combination of treatments based on palnt height benchmarks aged 21 HST (28,33 cm), 28 HST (34,33 cm), and 35 HST (42,00 cm). 


Toxins ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 303 ◽  
Author(s):  
Letizia Mondani ◽  
Roberta Palumbo ◽  
Dimitrios Tsitsigiannis ◽  
Dionysios Perdikis ◽  
Emanuele Mazzoni ◽  
...  

Ochratoxin A (OTA) is the most toxic member of ochratoxins, a group of toxic secondary metabolites produced by fungi. The most relevant species involved in OTA production in grapes is Aspergillus carbonarius. Berry infection by A. carbonarius is enhanced by damage to the skin caused by abiotic and biotic factors. Insect pests play a major role in European vineyards, and Lepidopteran species such as the European grapevine moth Lobesia botrana are undoubtedly crucial. New scenarios are also emerging due to the introduction and spread of allochthonous pests as well as climate change. Such pests may be involved in the dissemination of OTA producing fungi even if confirmation is still lacking and further studies are needed. An OTA predicting model is available, but it should be integrated with models aimed at forecasting L. botrana phenology and demography in order to improve model reliability.


2016 ◽  
Vol 9 (2) ◽  
pp. 200
Author(s):  
Rohit Bhati ◽  
Shailendra Singh Gaurav ◽  
Rajendra Singh ◽  
B. Singh ◽  
Aakansha Goswami ◽  
...  

2019 ◽  
Vol 83 (2) ◽  
pp. 109-118 ◽  
Author(s):  
M Orruño ◽  
C Parada ◽  
E Ogayar ◽  
VR Kaberdin ◽  
I Arana

2021 ◽  
Vol 9 (1) ◽  
pp. 148
Author(s):  
Marius Bredon ◽  
Elisabeth Depuydt ◽  
Lucas Brisson ◽  
Laurent Moulin ◽  
Ciriac Charles ◽  
...  

The crucial role of microbes in the evolution, development, health, and ecological interactions of multicellular organisms is now widely recognized in the holobiont concept. However, the structure and stability of microbiota are highly dependent on abiotic and biotic factors, especially in the gut, which can be colonized by transient bacteria depending on the host’s diet. We studied these impacts by manipulating the digestive microbiota of the detritivore Armadillidium vulgare and analyzing the consequences on its structure and function. Hosts were exposed to initial starvation and then were fed diets that varied the different components of lignocellulose. A total of 72 digestive microbiota were analyzed according to the type of the diet (standard or enriched in cellulose, lignin, or hemicellulose) and the period following dysbiosis. The results showed that microbiota from the hepatopancreas were very stable and resilient, while the most diverse and labile over time were found in the hindgut. Dysbiosis and selective diets may have affected the host fitness by altering the structure of the microbiota and its predicted functions. Overall, these modifications can therefore have effects not only on the holobiont, but also on the “eco-holobiont” conceptualization of macroorganisms.


Agriculture ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 69
Author(s):  
Cailong Xu ◽  
Ruidong Li ◽  
Wenwen Song ◽  
Tingting Wu ◽  
Shi Sun ◽  
...  

Increasing planting density is one of the key management practices to enhance soybean yield. A 2-yr field experiment was conducted in 2018 and 2019 including six planting densities and two soybean cultivars to determine the effects of planting density on branch number and yield, and analyze the contribution of branches to yield. The yield of ZZXA12938 was 4389 kg ha−1, which was significantly higher than that of ZH13 (+22.4%). In combination with planting year and cultivar, the soybean yield increased significantly by 16.2%, 31.4%, 41.4%, and 46.7% for every increase in density of 45,000 plants ha−1. Yield will not increase when planting density exceeds 315,000 plants ha−1. A correlation analysis showed that pod number per plant increased with the increased branch number, while pod number per unit area decreased; thus, soybean yield decreased. With the increase of branch number, the branch contribution to yield increased first, and then plateaued. ZH13 could produce a high yield under a lower planting density due to more branches, while ZZXA12938 had a higher yield potential under a higher planting density due to the smaller branch number and higher tolerance to close planting. Therefore, seed yield can be increased by selecting cultivars with a little branching capacity under moderately close planting.


2017 ◽  
Vol 38 (4Supl1) ◽  
pp. 2387
Author(s):  
Santiel Alves Vieira Neto ◽  
Fábio Ribeiro Pires ◽  
João Carlos Madalão ◽  
Douglas Gomes Viana ◽  
Carlos César Evangelista de Menezes ◽  
...  

Given the high costs of agricultural production, especially due to the price of fertilisers, particularly nitrogen, the use of inoculants to supply nitrogen to soybean crops is a widely recommended practice. The objective of this study was to evaluate the feasibility of applying inoculants through seed and planting furrow in soil previously cultivated with soybean and Brazilian native “cerrado” biome soil under greenhouse conditions. Seven treatments were tested: 1) inoculation via seed (inoculant + fungicide + micronutrient), 2) treatment via seed (fungicide + micronutrient), 3) control (only seed), 4) inoculation via furrow-dose 1 (recommended dose), 5) inoculation via furrow-dose 2 (twice the recommended dose), 6) inoculation via furrow-dose 3 (three times the recommended dose) and 7) inoculation via furrow-dose 1 + seed inoculation. We evaluated plant height, fresh and dry matter weight of the aerial part and nodules, number of total, viable and non-viable nodules, number of pods per plant and grain yield. Inoculation was more effective when used in cerrado soil, but soybean performance in treatments without inoculation was higher in previously cultivated soil. Application through furrow proved to be a viable practice due to the similarity of the results obtained with the traditional application by seed.


1977 ◽  
Vol 13 (4) ◽  
pp. 325-335 ◽  
Author(s):  
Aguilar M. Immer ◽  
R. A. Fischer ◽  
Joshue Kohashi S.

SUMMARYThe influence of leaf area and inter-plant competition on the growth and yield of a crop of high-yielding dry beans (Phaseolus vulgaris L.) in central Mexico was studied, using density and thinning treatments. The highest seed yield (4210 kg/ha at 14% moisture) was obtained with the highest density (28·8 plants/m2). Thinning showed that pods/plant was sensitive to inter-plant competition between 36 and 78 days after seeding (first flower at 50 days), but seeds/pod, and especially seed weight, were not sensitive. It is suggested that the close positive relation between yield and leaf area duration derives from the influence of photosynthate supply upon pod number.


1978 ◽  
Vol 91 (1) ◽  
pp. 47-60 ◽  
Author(s):  
J. N. Gallagher ◽  
P. V. Biscoe

SummaryAnalysis of measurements of absorbed radiation and leaf area indices of wheat and barley crops showed that throughout most of growth the fraction of absorbed solar radiation could be described by a simple exponential equation.For several of these crops grown under a wide range of weather and husbandry at Sutton Bonington and Rothamsted, 2-weekly values of crop growth rate (C) were closely related to radiation absorbed until ear emergence and about 3·0 g of dry matter (D.M.) were produced by each MJ of photosynthetically active radiation (PAR) absorbed. Final crop weight was closelyrelated to total PAR absorbed during growth (SA); on average about 2·2 g D.M. were produced per MJ absorbed, equivalent to a growth efficiency (Eg) of approximately 3·9%. Unfertilized and drought-stressed crops had a smaller Eg.The fraction of total crop D.M. harvested as grain (harvest index) varied more for wheat than for barley. Calculations of a maximum realizable grain yield made using the largest values of Eg and SA for the crops measured and assuming a harvestindex of 0.53 (achieved in an experimental crop) showed a grain D.M. yield of 10·3 t D.M./ha to be possible. To achieve such a yield would require full crop cover from the beginning of April until the end of July in a typical English growing season.


Euphytica ◽  
2021 ◽  
Vol 217 (4) ◽  
Author(s):  
N. A. Adetoro ◽  
O. O. Oworu ◽  
A. L. Nassir ◽  
A. Bello ◽  
E. Parkes ◽  
...  

AbstractThis study aimed at determining shoot and root characteristics of cassava as affected by root yield and the influence of soil moisture on vegetative growth and yield. Thirty cassava genotypes were evaluated for morphological and physiological characterization in three locations in Nigeria: Ibadan, Mokwa and Zaria. Randomized complete block design was used with four replicates. Studies on the pasting properties of the genotypes were also carried out. Data were collected on plant height, stem girth, stay-green ability, garri and fresh root weight. Genotypes differed significantly (P < 0.05) across and within locations for shoot and root characteristics. Across locations, genotype 011663 had the highest plant height (132.4 cm); 30572 had the largest stem girth (8.6 cm); and 010040 was the best stay-green (2.2). Genotype 011086 had the highest number of roots per plot (95.7), 950289 had the highest fresh root yield (24.3 t/ha), and 990554 had the highest percentage of dry matter (35.2). Trends in root yields across locations were Ibadan (28.9 t/ha), Mokwa (20.3 t/ha), and Zaria (8 t/ha). Five genotypes IITA-TMS-IBA950289, 010034, 990554, 011807, and 980581 had negligible interactions with the environment and so have broad adaptation and are considered stable; and two clones 011807 and 950166 were found to be the best for pasting properties. Breeding strategies that consider root size, total root number, harvest index, dry matter, with applications for household foods and industrial uses, will be an effective and efficient way to select genotypes for high yield.


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