INFLUENCE OF WEATHER FACTORS ON THE INCIDENCE OF PESTS AND DISEASES ON CABBAGE

V. JAWAHARA RAJU; K. SIVAPRAKASAM and T. MARIMUTHU

doi:https://doi.org/10.29321/MAJ.10.A01668

Madras Agricultural Journal

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INFLUENCE OF WEATHER FACTORS ON THE INCIDENCE OF PESTS AND DISEASES ON CABBAGE

Author: V. JAWAHARA RAJU, K. SIVAPRAKASAM and T. MARIMUTHU,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 80, Issue: jun-jun,

DOI:https://doi.org/10.29321/MAJ.10.A01668

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Abstract

Studies on the influence of weather factors on the incidence of pests and diseases on cabbage revealed that for every unit increase in rainy days there was an increase of 2.67 larval population of diamond back moth. The morning relative humidity showed significant positive association with the parasitoid, Apanteles plutellae. The relative morning humidity had significant negative relationship with cutworm population. The maximum and minimum temperatures had significant positive association with the incidence of black rot whereas minimum temperature had significant positive association with ring spot.

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