Preliminary Studies on incidence of insect pests on okra (Abelmoschus esculentus (L.) Moench) in Thailand

Sorapong Benchasri

Abstract: Among the insect pests that cause economic damage on okra, Aphis gossypii Glover, Thrips palmi Karny, Amrasca biguttula Ischida, Bemisia tabaci Genn. and Xanthodes transversa Guenee, have been observed on the cultivated plot of okra during the June to October 2009 and 2010 season. The most average occurrence at 8.99±1.14, 64.42±4.64, 52.44±3.99, 14.07±1.64 and 1.43±0.64 insects/plant of A. gossypii Glover, T. palmi Karny, A. biguttula Ischida, B. tabaci Genn. and X. transversa Guenee were observed respectively during the 2009 season, (June to October), while the most average occurrence at 9.81±1.12, 66.55±5.03, 54.44±4.51, 17.10±1.24 and 1.74±0.75 of A. gossypii Glover, T. palmi Karny, A. biguttula Ischida, B. tabaci Genn. and X. transversa Guenee were observed respectively during the 2010 season, (June to October). Effects of agroclimatic factors on the growth of insect pests were also observed during the duration of the study. Temperature, relative humidity and rainfall showed direct effect on the population trend of all insect pests.

Keywords: Abelmoschus esculentus; insect pest; okra; population; season

Date published: 2019-03-25