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Incidence of white fly (Bemisia tabaci Genn.) and their sustainable management by using biopesticides

GHOSH, SUNIL (2014) Incidence of white fly (Bemisia tabaci Genn.) and their sustainable management by using biopesticides. In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 2, Thuenen Report, no. 20, pp. 623-626.

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Ladysfinger (Abelmoschus esculentus L.) (Moench) is susceptible to various pests of which white fly (Bemisia tabaci Genn.) causes heavy damage. The pest was active throughout the growing period with a peak population (3.98 white fly /leaf) and (4.33 /leaf) during 20rd SMW (middle of May) in the pre-kharif crop and during 42nd -43rd SMW (middle of October) in the post kharif crop respectively. Sudden fall of population was found during July because of heavy rains. White fly showed non-significant positive correlation (p=0.05) with maximum temperature, minimum relative humidity whereas non-significant negative correlation with maximum relative humidity and significant negative correlation with weekly total rainfall. This study evaluated the efficacy of extracts from plants such as Polygonum hydropiper L. and Pongamia pinnata (L.), microbial insecticides like spinosad 45 SC (Saccharopolyspora spinosa Mertz & Yao) and Beauveria bassiana Vuillemin against B. tabaci infesting ladysfinger during the post-kharif season. Imidacloprid was the most effective treatment followed by the microbial insecticide spinosad. Satisfactory white fly control (> 50% population suppression) was achieved with extract of Polygonum plants (5% concentration ) and spinosad. The Polygonum extract was very effective against the white fly, achieving more than 60 % mortality at 3 and 7 days after spraying. Plant extracts and microbial insecticides of biological origin (biopesticides) have less or no hazardous effects on human health and the environment, therefore they can be incorporated in IPM programmes and organic farming in vegetable cultivation.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Ladysfinger, microbial pesticides, plant extracts, vegetable IPM, organic farming
Agrovoc keywords:
Subjects:"Organics" in general
Food systems > Food security, food quality and human health
Research affiliation: India
International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
Deposited By: GHOSH, DR. SUNIL
ID Code:23235
Deposited On:16 Oct 2014 08:34
Last Modified:16 Oct 2014 08:34
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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