Vol. 11, Special Issue 8 (2022)

Author(s):
Sarta M, Singh M, Sharma PL, Monika, Rani P, Sawraj Jit S, Diksha Devi and Kaushal B

Abstract:
The present investigation, “Seasonal incidence of natural enemies in brinjal crop under mid-hill conditions of Himachal Pradesh” was carried out in the experimental fields of Department of Entomology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during the year 2018. Among all the natural enemies, coccinellids and spiders were found as major natural enemies in brinjal crop. The maximum population of coccinellids 2.25 beetles / plant) was noticed during last week of August (34th SW) with corresponding weather parameters; maximum temperature - 28.2 °C, minimum temperature - 20.5 °C, relative humidity - 79% and rainfall - 4.2 mm while the maximum population of spiders (3.0 per plant) was noticed during last first week of September (36^th SW) with maximum temperature (27.6 °C), minimum temperature (19.6 °C), relative humidity (76%) and rainfall (28.9 mm). The correlation of coccinellids with maximum temperature (0.594) was positive and significant while it was positive and non-significant with minimum temperature (0.430) and relative humidity (0.291) but correlation with rainfall (-2.022) was found to be negative and non- significant. In case of spiders, all the weather parameters i.e. maximum temperature (0.424), minimum temperature (0.204), relative humidity (0.031) were non-significantly and positively correlated except rainfall (-0.145) which was negatively correlated with spider population.