Vol. 11, Special Issue 5 (2022)

Author(s):
Umesh, Rajesh Kumar, SS Yadav and Dalip Kumar

Abstract:
The present study on monitoring of guava fruit fly, Bactrocera spp. through methyl eugenol traps were carried out during rainy season at farmer’s field at village Sunderpur, District Rohtak, Haryana during 2016-17. The population of fruit fly started appearing in methyl eugenol traps from 23rd SMW (7.2fruit flies/trap/week) reaching its maximum in 33rd SMW (264.2 fruit flies/trap/week) and then population suddenly declined in 37th SMW which coincided with termination of harvesting of guava crop. The average maximum temperature 32.9 ^oC, average minimum temperature 26.6 ^oC, average morning relative humidity 81.8 per cent, average evening relative humidity 71.7 per cent and rainfall 0.86 mm were congenial for peak population build up of fruit fly on guava fruits crop during rainy season. The population of guava fruit fly, Bactrocera spp. had significantly negative correlation with maximum temperature and significantly positive correlation with morning and evening relative humidity.