Residual effects of fungicidal spray programmes on apple trees.

Autor: Byrde, Robert J. W., Harper, Christopher W., Holgate, Margaret E., Hunter, Thomas
Zdroj: Pesticide Science; 1973, Vol. 4 Issue 3, p327-333, 7p
Abstrakt: Spraying programmes for apple scab and mildew control sometimes had residual effects for one or even two years. Thus, benomyl (0.025% a.i.) and pyridinitril (0.035% a.i.) drastically reduced the subsequent incidence of cankers caused by Nectria galligena on young wood. Apple scab fruit infection, caused by Venturia inaequalis, was also less on trees on which benomyl had been used in the previous season. In the bark of such trees, toxic residues equivalent to 1 to 4 μg benomyl/g fresh wt. were detected by bioassay 7 months after spraying. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index