Seasonal incidence of major insect pests of jasmine Jasminum sambac L

Abstract

Jasmine Jasminum sambac L. is an important ornamental crop that fetches recurrent income to farmers. The present study was carried out in three locations Sevandhanagar, Navalurkuttappattu and Horticulture farm, TNAU, Tiruchirappalli, Tamil Nadu, India from August 2019 to September 2020. The seasonal incidence of major insect pests such as Hendecasis duplifascialis Hampson, Nausinoe geometralis Guenee, Contarinia maculipennis Felt, Frankliniella scultzei Trybom and Tetranychus urticae Koch were studied. Hendecasis duplifascialis incidence was observed to be maximum (31.63% damaged buds) in second fortnight of October in Sevandhanagar; in Navalurkuttappattu, it was the incidence of N. geometralis (2.2 webs/ plant) that was maximum, and noticed in the second fortnight of December. In horticulture farm, maximum damage was of C. maculipennis (48.66% damaged buds) noticed in the second fortnight of September. Thrips population was significant and was observed positively correlated with maximum temperature in Sevandhanagar (r = 0.55).