Effect of buprofezin on developmental stages of Diaphorina Citri Kuwayama (Hemiptera: Liviidae)

Abstract

Effect of buprofezin (7.5, 15, 30, 75, 150 and 300 ppm each) on development of Asian citrus psyllid (ACP), Diaphorina citri Kuwayama was studied on Citrus reticulata Blanco (budlings) with different stages of citrus psylla viz., 1-2-and 3-4-days old eggs, and first, third and fifth instar nymphs. The effect of IGR was dose-dependent and varied according to the age of the life stage. Mean egg hatching/plant for both 1-2-and 3-4-day old eggs were significantly low at 150 and 300 ppm. First and third instars were highly susceptible than fifth instars with zero survival at 150 and 300 ppm while adult emergence ranged between 40.33–44.67% from fifth instar at 150 and 300 ppm during season I and II. Similarly, fecundity of adults emerged from such treatments (first and third instar nymphs) were zero at higher concentrations of buprofezin (150 & 300ppm) while fecundity of adult females emerged from treated fifth instar nymphs released on healthy budling were nil. Hence, buprofezin may be incorporated as a management tactic in rotation with insecticides especially during flush emergence after further field evaluation as it has significant effect on growth, reproduction and survival of citrus psylla.