ORIGINAL ARTICLE
Seasonal incidence of natural enemies of key insect pests of cotton and their relationship with weather parameters
1
Agricultural Research Sub Station, Diggi, Tonk, Rajasthan Agricultural University, Rajasthan, India
Corresponding author
Shish Ram Dhaka
Agricultural Research Sub Station, Diggi, Tonk, Rajasthan Agricultural University, Rajasthan, India
Agricultural Research Sub Station, Diggi, Tonk, Rajasthan Agricultural University, Rajasthan, India
Journal of Plant Protection Research 2007;47(4):417-423
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ABSTRACT
The population of spider feeding on insect pests of cotton was observed throughout the growth period of the crop, being maximum in the month of July. Chrysoperla was observed from second fortnight of June to harvesting of the crop being maximum in November. The incidence of coccinellids was recorded from the middle of August to middle of September and remained till harvesting of the crop being maximum in the first fortnight of November. A positive significant effect of maximum and minimum temperature on spider and negative significant effect on population of chrysoperla and coccinellids was recorded. Evening RH exerted positive significant effect on spider and negative significant effect on coccinellids.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
REFERENCES (2)
1.
Kapadia M. N., Puri S.N. 1989. Seasonal incidence of natural enemies of Bemisia tabaci (Gennadius) on cotton. Indian J. Ecol. 16 (2): 164–168.
2.
Sharma P.D., Jat K.L., Takar B.L. 2004. Population dynamics of insect pests of American cotton ( Gossypium hirsutum L.) in Haryana. J. Cotton Res. Dev.18(1): 104–106.
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| eISSN: | 1899-007X |
| ISSN: | 1427-4345 |
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