Incidence of Henosepilachna Vigintioctopunctata Fab. on Brinjal in Eastern Uttar Pradesh.

ABSTRACT

Field trial was conducted to study the seasonal incidence and influence of abiotic and biotic factors on Henosepilachna vigintioctopunctata of brinjal during 2011-12.The incidence of H.vigintioctopunctata started during first week after transplanting with a mean population of 0.81 per planton brinjal crop. The peak incidence was observed during the third week of October with a mean population of 6.98 per plant and the incidence decreased gradually up to crop maturity. Data recorded on effect of abiotic and biotic factors on H.vigintioctopunctata population revealed that the incidence had non-significant relation with a biotic factors like minimum temperature, evening relative humidity and significant relationship with maximum temperature, morning relative humidity and rainfall. The pest population also shows positive and significant correlation with biotic factors like coccinellid beetles as well as spiders.