What are the species of peach aphids in early spring? How to prevent and cure?

The leaf buds of peach trees began to sprout in March, and most varieties entered the flowering stage after late March, and the root growth accelerated. At this time, it is easy to attack peach aphids, once there is no active treatment, it will directly affect the yield. What are the species of peach aphids in early spring? How to prevent and cure?

What are the species of peach aphids?

1. Peach aphid

There are 10-30 generations a year, overwintering with eggs in the branches, axils, twigs and cracks of peach trees. In the following year, the peach tree sprouts to the flowering stage, the eggs begin to hatch, cluster on the buds and suck the juice. It began to propagate in late March, and the leaf back of the colony was harmful. The number of aphids increased sharply in May, and the damage was the most serious, and they began to produce winged aphids and continue to breed on vegetables.

2. Peach powder aphid

It occurs for more than 20 generations a year, overwinters with eggs at the branches and buds of peach trees, and begins to hatch from March to April the following year. From May to June, the reproduction is the fastest and the harm is the most serious.

3. Peach tumor aphid

There are more than 10 generations a year, overwintering with eggs on peach trees. Peach trees began to hatch after germination in the middle and late March of the following year, and the damage was the most serious in May and June.

Second, how to control peach aphids in early spring?

1. Strengthen the management of orchards

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

2. Reasonable cultivation.

Tobacco, cabbage and other crops should not be planted between or near the peach orchard to reduce the summer breeding places of aphids.

3. Medicament smear

Apply a 6 cm wide insecticide ring around the trunk with a brush, and then wrap it in paper or plastic sheet. the efficacy period is about 15 days.

4. Protect natural enemies

Ladybugs, aphid flies, lacewings and parasitoids are the natural enemies of aphids, so they should spray broad-spectrum pesticides as little as possible, and avoid spraying when there are many natural enemies.

5. Yellow entrapment

Peach aphids have a yellowing tendency and can be caught and killed by hanging yellow boards or painting branches with butter or engine oil.

6. Spraying pesticides

After the eggs hatched in spring, when the peach trees were red and after falling flowers, cypermethrin, imidacloprid, acetamiprid and spirochete ethyl ester were sprayed alternately. For peach powder aphid, detergent solution can be added to the medicine solution to increase adhesion and remove wax powder from the insect body.

Third, how to prevent the peach elephant weevil?

1. Catch adults

Making use of the false death of the adult, the cloth under the tree shook the branch when the dew was not dry in the early morning, and the adult fell after being frightened, and then concentrated on the treatment. After rain, adults appear the most, and the effect is good.

2. Spray prevention and cure

During the peak period of adults in April, spraying 1000 times of trichlorfon was effective, or 1000 times of 40% dimethoate emulsion, or 1000 times of dichlorvos.

3. Remove insects and fruits

The larvae that have not yet fallen fruit can be eliminated by picking up the fallen fruit and picking the decayed fruit on the tree and retting it with fertilizer or soaking it in water.

4. Sprinkle medicine on the ground

Before the adults are unearthed in spring, sprinkle 50% carbaryl powder under the orchard trees, or spray 25% phoxim capsule 100 times under the canopy during the peak period of adult emergence.