What medicine does peach tree aphid use to control well? Master the medication time and finish it in 3 times!

The quality of orchard management has a significant impact on the yield of a year, in which peach aphids are one of the main pests of peach trees, if the early control measures are not in place, it will lead to serious fruit loss of peach trees, then what medicine should be used to control peach aphids?

I. species of peach aphids

There are three kinds of aphids that harm peach trees: peach aphid, peach powder aphid and peach tumor aphid.

1. Peach aphids, also known as peach aphids, tobacco aphids and vegetable aphids, overwinter with eggs in the branches, axils, twigs and cracks of peach trees. in the early spring of the next year, peach buds germinate to the flowering stage, the eggs begin to hatch, and newly hatched nymphs cause damage on peach buds and flowers. with the rapid growth of new shoots, the damage is the most serious in May, and begins to produce winged aphids and continue to breed on tobacco and vegetables.

2. Peach powder aphid: also known as peach big tail aphid and peach pink green aphid, the eggs overwintered at the branches and buds of peach trees, and began to hatch from March to April the next year. After the leaves were killed, they rolled longitudinally to the back, the leaves thickened, the color turned yellow, and were covered with a lot of self-powder. it causes deciduous leaves and propagates most quickly and harms most seriously from May to June.

3. Peach tumor aphid, also known as peach tumor aphid, overwinters with eggs on peach trees, and begins to hatch after germination in mid-late March of the following year. If newly hatched aphids feed on the back of leaves, the damage is the most serious in May and June.

When the above three kinds of aphids are sprouting and spreading leaves of peach trees, adult and nymph aphids suck sap on the back of peach leaves and tender shoots, harming the leaves. April to May is the peak period of peach aphids. The leaves of peach trees are pale and curled after being killed, affecting photosynthesis, and when the leaves fall off seriously, affect the yield and flower bud formation of peach trees, so we must pay attention to timely control.

II. The best period for aphid control

The best period for aphid control is when peach leaves are green and flower buds appear, that is, when peach blossoms are red, peach blossoms should not be used, peach aphids should be prevented and early control should be advocated before peach leaves and buds are not harmed.

Third, what medicine should be used to control peach aphids?

The commonly used drugs to control peach aphids are acetamiprid, imidacloprid, imidacloprid and so on. from the application of production in recent years, aphids are easy to produce resistance to many kinds of commonly used drugs. according to the relevant research data, at present, there are aphid populations resistant to imidacloprid, imidacloprid and other drugs in different areas. in areas where aphids appear drug resistance, drugs such as fipronil and fipronil can be used according to local conditions. Or use these drugs in combination with imidacloprid and imidacloprid.

1. When sprouting in early spring, the stone-sulfur mixture should be used normally.

2. Peach blossom red stage: fipronil (22.4% Mel 4000 times or 50% 10 000 times-12000 times)

3, the last flowering stage (80% falling flowers): snail ethyl ester (22% music 4000-5000 times).

Be sure to grasp the medication period, the water consumption should be sufficient, the spray should be uniform and thorough, and the interval is 7-10 days. Pay attention to alternate use when using, so as to avoid drug resistance of aphids. Peach powder aphids can add detergent solution to increase adhesion and remove wax powder from worms. Note that fipronil can be used twice at most in one growing season.

4. Other control methods of peach aphids

1. Strengthen the management of orchards

Combined with spring pruning, cut off the damaged branches and burn them centrally.

2. Biological control

Protect the natural enemies of pests, mainly tortoise ladybug, discolored ladybug, seven-star ladybug, lacewings, aphid flies, mite, spiders, parasitic wasps and so on. When natural enemies can inhibit aphids, spraying times can be reduced as much as possible.

3. Physical prevention and control

Aphids are sensitive to yellow, and fruit farmers can control aphids by hanging yellow armyworm boards in the orchard.

The above is about the peach aphid control methods, in fact, the key to prevention and control is to prevent and control in advance, before the peach leaves and new buds have not been damaged.