Vol. 12, Issue 3 (2023)

During that period, the average range of maximum (34.00 to 38.40 ℃) and minimum temperature (13.9 to 21.0 ℃) was slightly increased and maximum and minimum relative humidity was observed to be decreased (89-71%) and (18 to 26%), respectively. According to the data of correlation between mango hoppers population and weather factors, it was recorded that the morning relative humidity ((0.1718**) and bright sunshine (BSS) both positively correlated with the mean hoppers population (0.6227***). This findings confirmed that the mean population of mango hoppers had a significantly favourable relationship with morning relative humidity and bright sunshine hours. The mean population of hoppers, on the other hand, had a negative correlation with minimum and maximum temperatures, precipitation and evening relative humidity.

Field experiment to study the bio-intensive management of mango hoppers (I. clypealis) through sequential spraying among the BIPM packages evaluated against hoppers on mango, the BIPM package of T₆ (Imida-NSE-Thia-Ll-Ma) consisting spray of imidacloprid 17.8% SL @ 0.30 ml/l ml per litre, later NSE 5% @ 1.00 ml per litre, followed by thiamethoxam 25% WG at 0.20 g/l ml per litre, L. leccanii (1×10⁸ CFU/ml) @ 5.0 g per litre, followed by M. anisopliae (1×10⁸ CFU/ml) @ 5.00 g per litre at 15 days interval found significantly superior with 4.51 mean of surviving hoppers per panicle and in reduction of hoppers population with 60.40 percent over untreated control.