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Evaluation of time of insecticidal application on the control of leafhopper, Amrasca biguttula biguttula Ishida (Cicadellidae: Homoptera) and aphid, Aphis gossipii Glover (Aphididae: Homoptera) on okra*

Published online by Cambridge University Press:  19 September 2011

N. K. Krishna Kumar ,
K. Srinivasan  and
H. R. Sardana
N. K. Krishna Kumar
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
K. Srinivasan
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
H. R. Sardana
Affiliation:
Indian Institute of Horticultural Research, Hessaraghatta Lake Post, Bangalore-560 089, India
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Abstract

Studies on critical time of insecticidal protection in relation to damage by aphid, Aphis gossipii Glover and leafhopper, Amrasca biguttula biguttula Ishida on plant growth and yield of okra revealed that 21–42 days after germination, was the most critical time prior to fruiting. Application of carbofuran at the time of sowing was redundant. Effective plant protection 21–42 days after germination resulted in lowest leafhopper and aphid infestation and subsequently the highest benefit to cost ratio.

Résumé

Des études sur le temps critique de la protection d'insecticide en relation avec le ravage par des pous et des sauteurs de feuilles sur la croissance et le rendement de la plante en okra a révelé que 21–42 jours après la germination, d'être le plus critique avant la phase fruitière. L'application de carbofuran au temps des semilles était redondant. Dés methodes effectives de la protection de plante 21–42 joure après la germination avait pour résultat la moindre infestation des sauteure de feuilles et des pour et par la suite le phis haut avantage économique.

Keywords

Critical crop growth stageAmrasca biguttula biguttulaAphis gossipiicarbofuranmonocrotophosokraLa phase de la croissance criticaleAmrasca biguttula biguttulaAphis gossipiicarbofuranmonocrotophosokra
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 10 , Issue 3 , June 1989 , pp. 333 - 339
Copyright
Copyright © ICIPE 1989

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References

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