Chemical control of the beech aphid Phyllaphis fagi
1996
Pronk, A.A. | Rotteveel, K. (Research Station for Nursery Stock, Boskoop (Netherlands))
Foliar applications of two systemic insecticides, imidacloprid and acetamiprid, were tested on one-year-old beech (Fagus sylvatica). Their efficacy was compared with the control achieved with triazofos and propoxur. Imidacloprid was also tested as a foliar application in seedlings and as a seed treatment at different rates. The results show that in 1994 and in 1995 imidacloprid at field applications of 0.07 g a.i. per litre controlled Phyllaphis fagi much better than triazofos or propoxur. Acetamiprid applied at 0.1 g a.i. per litre achieved even better control. The seed treatment with imidacloprid was 12.6 g a.i. per kg seed in 1994 and was reduced to 0.35 g a.i. per kg seed in 1995. The latter application controlled Phyllaphis fagi sufficiently throughout the entire growing season and represents a significant reduction in the active ingredient used per hectare. This study demonstrates that chloronicotinyls will be very important for controlling Phyllaphis fagi when authorized for use on nursery stock
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил University of Liège