Department of Entomology, Assam Agricultural University, Jorhat-785 013, Assam, India
*Present Address: Plant Protection Department, Tocklai Experimental Station, Jorhat 785 008, Assam. To whom correspondence may be made.
Online published on 3 November, 2011.
Topical application of aqueous suspensions of methoprene and diflubenzuron on eggs and adults of rice hispa, Dicladispa armigera rerealed that with increased doncentration the eeg hatching decreased, the LC50 values being 0.92 and 746.13 ppm for methoprene and diflubenzuron, respectively. These compounds were not lethal to adults but enhanced their fecundity at low doses. Hatchability of such eggs was drastically reduced.
Rice hispa, methoprene, diflubenzuron, ovicide
