Pest control methods of pear aphid

This insect, referred to as pear aphid, is the main pest of pear tree, which is distributed in all pear areas. After the damage of pear trees, a large number of leaves curled, resulting in early defoliation, tree potential decline, fruit development was blocked, seriously affecting the yield and quality.

[occurrence regularity] it occurs for more than 10 generations a year. The overwintering eggs usually hatch in March and late March when the pear buds expand and burst. The young aphids continue to give birth to new young aphids after growing, and the winged aphids begin to produce in late April. In May, a large number of winged aphids form and migrate to weeds to breed. The winged aphid migrated back to the pear tree in October and produced female and male winged aphids in November, which spawned and overwintered.

[control methods] (1) the control of pear aphid should be carried out before the pear leaves are curled. Pear bud sprouting and whitening to the early stage of leaf expansion is the key period of spraying control. 40% dimethoate emulsion 2000 can be used to keep the liquid. If the pear aphid is resistant to dimethoate, it can be sprayed with 2000 times of 20% pyrethroid emulsion. In recent years, it has been reported that 2.5% Uranus EC 1000-2000 times and 10% an Lubao EC 1500 times have excellent effect on controlling aphids in fruit trees. If you want to combine with disease control, it can be mixed with 1000 times of 50% carbendazim wettable powder and 1000 times of 50% topiramine wettable powder. (2) there are many kinds of natural enemies of pear aphid, such as ladybug, grass ridge, aphid fly, aphid cocoon peak, etc., so it is necessary to fully protect and release the natural enemies to restrain the harm of pear aphid.