Co-Authors:
Mendel, Z., Dept. of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Blumberg, D., Dept. of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Ishaaya, I., Dept. of Entomology, ARO, Volcani Center, Bet Dagan, 50250, Israel
Abstract:
The effectiveness of buprofezin (aqueous suspensions from 25% wettable powder) on cumulative nymph mortality and reproduction of two homopterous pests, Icerya purchasi Maskell (Margarodidae) and Planococcus citri (Risso) (Pseudococcidae), was investigated under laboratory conditions. Buprofezin was very effective against crawlers of both species. Dipping in concentrations of 0.002%, 0.01% and 0.05% (a. i.) resulted in 91–99% nymph mortality of P. citri, whereas 100% mortality was recorded when I. purchasi was treated at 0.05% (a. i.); the 3rd-instar nymphs of I. purchasi were less susceptible to the chemical. Death of the larval stages occurred mainly during the molting process to the 2nd-instar nymphs. At 0.05%, buprofezin sprayed on adults slightly reduced fecundity and decreased egg hatch to 31% for I. purchasi and, depending on the exposure period of the females, to 49-7% for P. citri. Buprofezin at 0.05% exhibited strong ovicidal activity on P. citri, resulting in inhibition of over 80% egg hatch. © 1991, Springer Science + Business Media B.V.. All rights reserved.
תפריט נגישות
ניגודיות עדינה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם
