Influence of weather factors on the incidence of pest complex of cashew

Abstract

The field experiment was conducted in cashew plantation of village Sonarpal, Turenar and Dimrapal, District Bastar, Shaheed Gundadhur College of Agriculture and Research Station, Jagadalpur, Bastar (C.G.) during 2017-18. The results revealed that maximum incidence of pest were observed during new growth of flush and flower. The highly significant positive correlation (r = 0.622) was observed between TMB (shoot damage) and maximum temperature while, significant negative correlation (r = - 0.750) was recorded between relative humidity morning and TMB (shoot damage). The leaf eating caterpillar (damage %) showed significant negative correlation with minimum temperature (r = - 0.710) and evening relative humidity (r = - 0.577). The leaf folder (Damage %) showed negative correlation with maximum temperature (r = - 0.132), morning relative humidity (r = - 0.187) and evening relative humidity (r = - 0.099), similarly positive correlation with wind velocity (r = 0.103).