Impact of Abiotic Factors on Occurrence of  Capsule Borer and Sucking Pests in Sesamum

P. Divya; S. Dhurua; M. S. V. Chalam; S. Govinda Rao; Gummadidala Chaitanya

doi:10.23910/2/2024.5076b

Authors

P. Divya Dept. of Entomology, S. V. Agricultural College, Tirupati, Acharya N.G. Ranga Agricultural University, Guntur, Andhra Pradesh (517 502), India
S. Dhurua Dept. of Entomology, Agricultural College, Naira, Acharya N.G. Ranga Agricultural University, Guntur, Andhra Pradesh (532 185), India
M. S. V. Chalam Dept. of Entomology, S. V. Agricultural College, Tirupati, Acharya N.G. Ranga Agricultural University, Guntur, Andhra Pradesh (517 502), India
S. Govinda Rao Dept. of Statistics and Computer Applications, Agricultural college, Naira, Acharya N.G. Ranga Agricultural University, Guntur, Andhra Pradesh (532 185), India
Gummadidala Chaitanya Dept. of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh (221 005), India

DOI:

https://doi.org/10.23910/2/2024.5076b

Keywords:

Antigastra, correlation, leaf hopper, standard week, regression, white fly

Abstract

A field experiment was conducted at Agricultural college, Naira, Srikakulam, Andhra Pradesh, India during early summer (January–April) of 2021 to know about the incidence of leaf webber and sucking pests viz., leafhopper (Hishimonus phycitis Distant) and whitefly (Bemisia tabaci Gennadius) its relation with main weather factors. Results revealed that a peak incidence of mean capsule borer population per plant were recorded in 9^th and 11^th standard weeks, respectively. The correlation study revealed that the Antigastra larvae had significantly positive correlation with maximum temperature (r=0.48) and significantly negative correlation with relative humidity (r=- 0.71). The regression analysis revealed that these factors accounted for approximately 59.8% of the variation in the capsule borer population (R²=0.598). The incidence of leafhopper (Hishimonus phycitis Distant) and whitefly (Bemisia tabaci Gennadius) were started during 5^th and 4^th SMW attained their peaks during 11^th an 12^th SMW respectively. The correlation study revealed that the leafhopper showed significant positive correlation with maximum temperature (r=0.623) and minimum temperature (r=0.283) and significantly negatively correlated with morning and evening relative humidity (r=-0.165, r=-0.122) respectively. While the correlation study between whitefly population and weather parameters revealed that the it showed positive correlation with maximum (r=0.821) and minimum (r=0.120) temperature and negatively correlated with morning and evening relative humidity (r=-0.097, r=-0.182) respectively whereas, rainfall showed non-significant correlation (r=0.00) with the both sucking pests.