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Plant Science Today (PST)

Research Articles

Vol. 13 No. sp5 (2026): Recent Advances in Agriculture

Crop weather-pest relationships on cowpea under varied climatic factor regimes in Tamil Nadu

DOI
https://doi.org/10.14719/pst.11570
Submitted
1 September 2025
Published
01-07-2026

Abstract

Experiments results revealed that in inland ecosystem, maximum number of leafhoppers, thrips, spotted pod borer larva and coccinellids were recorded in 14th standard mean week and higher population of aphid was peak in 15th standard mean week, pod bug in 13th standard mean week and spider 12th standard mean week. In coastal ecosystem during 2019, higher population of leafhopper, aphid, thrips and spotted pod borer larva in 15th standard mean week. The peak population of pod bug was recorded in 16th standard mean week. Inland ecosystems during 2020, maximum peak activity of sucking pest and natural enemies were recorded in 42nd standard mean week. The peak activities of pod bug and spotted pod borer larvae were also recorded in 41st and 43rd standard mean week. In Coastal ecosystem during 2020, the leaf hopper and aphid was peak attained in 43rd standard mean week. Thirps and pod bug /pant was peak was observed on 42nd standard mean week and spotted pod borer and spider per plant was peak on 44th standard mean week and coccinellid beetle was peak on 41st standard mean week. In inland and coastal ecosystem, the percentage contributions for the multiple regression equations were 46.00–98.30 % and 60.60–97.20 %, respectively,  during rabi, 2019 and 0.40–99.20 % and 76.30–99.40 %, respectively,  showing the influence of weather parameters on pest populations.

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