scholarly journals Effect of Fipronil + Isoprothiolane against Onion Thrips and Purple Blotch Disease and Its Effect on Parasites and Predators

2020 ◽  
pp. 229-241
Author(s):  
M. R. Ravikumar ◽  
T. Ganapathi ◽  
G. R. Rajakumar
Keyword(s):  
Allium Cepa ◽  
Insect Pests ◽  
Cost Effective ◽  
Onion Thrips ◽  
Trifoliate Leaf ◽  
Pests And Diseases ◽  
Allium Cepa L ◽  
The World ◽  
Harvesting Stage ◽  
Bulb Yield

Onion (Allium cepa L.) is one of the important vegetable cum condiment crop grown throughout the world. Onion crop is infested by various insect pests and diseases right from seedling to harvesting stage. The experiment was conducted in farmer’s fields of Ranebennur (Haveri–District) to evaluate the bio-efficacy and Phytotoxicity of Fipronil + Isoprothiolane against Thrips and Purple Blotch disease in onion and its effect on parasites and predators during kharif-2018 and rabi-2019 seasons. Amongst the treatments, the formulation Fipronil 5% + Isoprothiolane 28% EC @ 1500 ml/ha was excellent in controlling thrips (2.47/trifoliate leaf) and showed the least severity of purple blotch  (3.02% PDI) followed by Fipronil 5% + Isoprothiolane 28% EC@ 1250 ml/ha (2.85 and 3.25)1000 ml/ha (2.99 and 3.67 % PDI) respectively. The results revealed that amongst the treatments, Fipronil 5% + Isoprothiolane 28% EC @ 1500 ml recorded the highest bulb yield                (21.52 t/ha) which was on par with the 1250 and 1000 ml/ha. The formulation Fipronil 5% + Isoprothiolane 28% EC @ 1000 ml/ha was found to be  cost effective followed by treatment of Fipronil 5% + Isoprothiolane 28% EC @ 1250ml /ha for control of thrips and  prevention of Purple Blotch disease hence which is recommended for  control of thrips and Purple Blotch  disease in onion.

Correlation Studies for Bulb Yield and Yield Contributing Traits among Onion (Allium cepa L.) Genotypes

2018 ◽  
Vol 9 (4) ◽  
pp. 1-6
Author(s):  
A. A. Gulumbe ◽  
L. Abubakar ◽  
B. M. Sokoto ◽  
A. A. Aliero
Keyword(s):  
Allium Cepa ◽  
Correlation Studies ◽  
Allium Cepa L ◽  
Bulb Yield

scholarly journals Farmer's Stance on Decreasing Production of Local Red Onion (Allium cepa L.) Farming in Buttu Pamboang Village, Majene

2020 ◽  
Vol 1 (1) ◽  
pp. 25-29
Author(s):  
Ikawati Karim
Keyword(s):  
Allium Cepa ◽  
Likert Scale ◽  
Production Data ◽  
Onion Plant ◽  
Foreign Markets ◽  
Commercial Farming ◽  
Allium Cepa L ◽  
The World ◽  
Strategic Role ◽  
Commodity Trading

In general, farmers in Buttu Pamboang Village in Majene District in carrying out the cultivation of onion plants have not applied the rules of cultivation correctly and precisely, resulting in a decline in crop. Agricultural commodities have a strategic role in realizing government policy to increase foreign exchange acquisition. The toughness of the role in the world trade globalization era is faced with the competition of commodity quality, both in domestic and foreign markets. This Era is characterized by the increasingly free commodity trading between countries in the world including vegetable commodities. In Indonesia, the local red onion plant (Allium cepa L.) has been cultivated by farmers as a commercial farming. However, the presence and demand of red onion that continue to increase every year cannot be followed by the increase in production. Data of the Agricultural office of Pamboang Village, October 2015 that the amount of local red onion productivity ranged from 5-6 tons and the production amount ranged from 10-12 tons with 2 ha of farmland area in 2014. It can be concluded that the production of local red onion in 2015 in the Pamboang Village decreased compared to the previous year, the red onion productivity of 2015 average ranged from 2-3 tons. This research aims to identify the attitude of farmers in Buttu Pamboang Village to decline in production in the onion farming business and know the factors that cause a decline in the production of local red onion in Buttu Pamboang Village in Pamboang District of Majene Regency. To identify the assessment of the farmer's stance, analyzed using Likert scale. The Likert scale is the identification of assessments to measure the attitudes and opinions and perceptions of the person/group on social symptoms. The results of the study proved that the attitude of farmers in Buttu Pamboang Village to the decline of production is good or well received.

scholarly journals Research and development of genetically engineered soybean using insect-resistance genes derived from Bacillus thuringiensis

2020 ◽  
Vol 18 (1) ◽  
pp. 1-21
Author(s):  
Le Thi Thu Hien ◽  
Pham Le Bich Hang ◽  
Nguyen Tuong Van ◽  
Le Thi Minh Thanh ◽  
Dao Thi Hang ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Insect Resistance ◽  
Resistance Genes ◽  
Insect Pests ◽  
Economic Value ◽  
Herbicide Tolerance ◽  
Genetically Engineered ◽  
Pests And Diseases ◽  
Good Ability ◽  
The World

Soybean (Glycine max) is one of the crops which have high economic value and serve for food, feed and process of many countries around the world. However, there are many factors affecting the productivity of soybean, of which insect pests and diseases are the most harmful agents. Therefore, an application of biotechnology to transfer insect resistance genes derived from a species of bacteria Bacillus thuringiensis can contribute to increase soybean yield and significantly reducing pesticide use. Currently, there are many insecticidal proteins detected from B. thuringiensis such as Cry, Cyt and Vip with a broad and specific spectrum belonged to several orders Lepidoptera, Diptera, Coleoptera, Homopera, and Nematoda. Numerous studies have been implemented over the world to transfer genes encoding these proteins in combination or modified forms to increase their toxicity. Several events of genetically engineered soybean with stacked traits of insect resistance and herbicide tolerance are commercialized and approved to be cultured in many countries such as MON 87701 × MON 89788 or DAS-81419-2. In Vietnam, studies on genetically engineered soybean with insect resistance trait has been carried out. Moreover, the exploitation, screening and selection of high biodiversity and indigenous B. thuringiensis strains which habors specific genes capable of killing targeted insects and serve as materials for plant transformation are great scientific meaning and potential practical application. This will be an important source of materials to create many soybean cultivars with good ability of insect resistance in order to meet specific needs.

scholarly journals Effects of plant density and cultivar on yield responses in onions (Allium cepa L.) grown from seeds

2013 ◽  
Vol 50 (1-2) ◽  
pp. 221-229
Author(s):  
Jan Rumpel ◽  
Kazimierz Felczyński
Keyword(s):  
Allium Cepa ◽  
Field Experiments ◽  
Plant Density ◽  
Leaf Fall ◽  
Marketable Yield ◽  
Onion Bulbs ◽  
Allium Cepa L ◽  
Yield Responses ◽  
Bulb Yield ◽  
Size Grading

Two field experiments were conducted to study the effect of plant density on yield, size grading and maturity of onion bulbs grown from seeds. In the first experiment carried out during 1991-1993, three onion cultivars (Hysam F<sub>1</sub> , Mercato F<sub>1</sub> and Sochaczewska) were sown for intended densities of 20, 40, 60, 80,100 and 140 plants m<sup>-2</sup>, whereas in the second one, in 1996, six onion cultivars (Spirit F<sub>1</sub>, Summit F<sub>1</sub>, Hyduro F<sub>1</sub>, Armstrong F<sub>1</sub>, Renate F<sub>1</sub> and Robusta) were sown for intended densities of 40, 60 and 80 plants m<sup>-2</sup>. The onions were grown on beds, 1,35 m wide, in 4 rows per bed (27+27+27+54 cm). Marketable yield increased with plant density, and depending on year was highest at 80 or 100 plants m<sup>-2</sup>. The average marketable yield of the 1991-1993 experiment increased from 20.5 t·ha<sup>-1</sup> at 20 plants m<sup>-2</sup> to 32.8 t·ha<sup>-1</sup> at 80 plants m<sup>-2</sup>, whereas that of the 1996 experiment increased from 48,9 t-ha<sup>-1</sup> at 40 plants m-2 to 59.0 t·ha<sup>-1</sup> at 80 plants m<sup>-2</sup>, respectively. Yield of large bulbs decreased with density and was highest at 20-40 plants m<sup>-2</sup>, oposite to the yield of small bulbs, which was highest at the highest density of 140 plants·m<sup>-2</sup>. The medium bulb yield increased with density, at the some way as compared the total marketable yield. No greater effect of cultivar on bulb size grades was found and the existing differences were proportional to the total marketable yield . Plant density hastened maturity of onions, and at density of 140 plants m<sup>-2</sup> the leaf fall-over occurred 9-10 days earlier as compared at density of 20 plants m<sup>-2</sup>. The cultiwars used. can be placed in the following order of decreasing productivity: 1 . Mercato F<sub>1</sub>, 2. Hysam F<sub>1</sub> and 3. Sochaczewska, - in the first expeiiment (1991-93) and 1. Annstrong F<sub>1</sub>, 2. Spirit F<sub>1</sub>, 3. Robusta, 4. Renate F<sub>1</sub>, 5. Hyduro F<sub>1</sub> and 6. Summit F<sub>1</sub> - in the second experiment (1996), respectively.

Date of Sowing and Genotype Interaction Effect on the Bulb Yield of Transplanted Onion (Allium cepa L.)

2002 ◽  
Vol 1 (6) ◽  
pp. 675-677 ◽  
Author(s):  
Derawadan . ◽  
Shoukat Ali . ◽  
Mohammad Tahir . ◽  
Abdul Majeed . ◽  
Ayub Khan .
Keyword(s):  
Allium Cepa ◽  
Interaction Effect ◽  
Allium Cepa L ◽  
Genotype Interaction ◽  
Bulb Yield
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