Journal of Pest Science

, Volume 79, Issue 2, pp 103–111 | Cite as

Neem oil as a potential seed dresser for managing Homopterous sucking pests of Okra (Abelmoschus esculentus (L.) Moench)

  • P. Indira Gandhi
  • K. Gunasekaran
  • Tongmin Sa
Original Paper


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.


Biopesticides Seed treatment Systemic chemical insecticides Sucking pests Fruit yield 



We express our gratitude to Dr. M. Madhaiyan, S. Poonguzhali, R. Anandham and S. Senthil Nathan for their valuable suggestions and constructive comments on an earlier version of this manuscript. The facilities provided to carry out this research work by Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India and Financial assistance from Ministry of Agriculture and Forestry through the R&D promotion centre for Agriculture and Forestry for the first author is gratefully acknowledged.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Agricultural ChemistryChungbuk National UniversityCheongjuRepublic of Korea
  2. 2.Department of Agricultural EntomologyTamil Nadu Agricultural UniversityCoimbatoreIndia

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