Neem oil as a potential seed dresser for managing Homopterous sucking pests of Okra (Abelmoschus esculentus (L.) Moench) |
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Authors: | P Indira Gandhi K Gunasekaran Tongmin Sa |
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Institution: | (1) Department of Agricultural Chemistry, Chungbuk National University, 361763 Cheongju, Republic of Korea;(2) Department of Agricultural Entomology, Tamil Nadu Agricultural University, 641003 Coimbatore, Tamil Nadu, India |
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Abstract: | Insecticidal seed treatment is an alternative method to spray and granular applications. It can protect the crop right from
germination to reproductive stage. Recurrent use of chemical insecticides destabilizes the ecosystem and enhances the development
of resistance in pest population. Use of biopesticides like neem oil (NO) is a promising one in this situation. Two field
experiments were conducted to test the efficacy of NO as a seed dresser (20 ml kg−1) and the effect was compared with systemic chemical insecticides imidacloprid (7 g kg−1) and carbosulfan (7 g kg−1) and Pseudomonas fluorescens (10 g kg−1). Field studies revealed that the neem oil 60EC (C) (NO 60EC (C)) recorded minimum population of sucking pests Leafhopper—Amrasca biguttula biguttula Ishida and Aphids—Aphis gossypii Glover (Homoptera: Cicadellidae and Aphididae), i.e., below the ETL (2 number per leaf) up to 45 days after sowing and provided
better yield compared to control. Although the systemic chemical insecticide imidacloprid performed better by recording 11,280
and 11,580 kg ha−1 of marketable fruit yield, NO 60EC (C) also recorded about twofold increase in marketable fruit yield 11,000 and 10,620 kg ha−1, respectively, in 2001 and 2002 experiments. Results of this study suggest that NO could be used as a potential seed dresser
for managing sucking pests in okra. |
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Keywords: | Biopesticides Seed treatment Systemic chemical insecticides Sucking pests Fruit yield |
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