سبزینه - سایت تخصصی کشاورزی و گیاه پزشکی

The fruit tree red spider mite, Panonychus ulmi, is a major pest in almost all fruit
growing regions of the world. Spread of P. ulmi to most apple-growing areas has
probably been caused by the distribution of nursery stock carrying winter eggs. This
mite is stated to be an important secondary pest