Peach meal

Peach whitefly Hyalopterus amygdale Blanchard, also known as peach big pheasant, peach pink green pheasant, belongs to the family Homoptera. Domestic distribution in North China, East China, Northeast China; foreign Europe, Japan distribution. Damaged peaches, apricots, plums, loquat leaves, reeds, etc.

Injurious? Into the nymphs, new shoots and backstab suck juice, the victim leaves chlorosis and vertical back leaf volume, leaf volume white wax powder, when severe leaves fall, young shoots dry. Excretion of honeydew often causes coal disease.

Morphological characteristics adults: winged females, female body length 2 to 2.1 mm, wings have been about 6 mm, head and chest is dark yellow to black, belly yellow-green, body was white wax powder. The wingless females have a body length of 2.3 to 2.5 mm, green body, white wax powder, compound eye red-brown, short belly tube, black, tail piece grow up, black, conical, 5 to 6 root hairs.

Egg: oval, 0.6 mm long, yellowish green and black.
If the corpus callosum is small and green is small, it is similar to that of a female without wings. Was white powder. If wings are well developed, there are winged buds.
Life history and habits occur 10 to 20 generations a year. There are more than 20 generations of Nanchang in Jiangxi Province and more than 10 generations in Beijing. The type of life cycle is in the form of migrating, with winter eggs, buds, cracks, and short branches in winter hosts, such as peaches. Hosts incubate when budding in winter, clustering on young shoots, and damaging their leaves. During the period from May to June, the most serious breeding threatened the breeding of a large number of females with winged females, moved to the summer host (Aceraceae, etc.) for breeding and breeding, and from October to November, they developed winged acarids and returned to the winter host for breeding. Produce sexual mating wintering.

Control methods

1, early spring spraying prevention and control: About after the germination of peach, when the hatching rate of eggs reaches 80% when spraying control, when the insects are neat, and the least resistant to drugs, but also to avoid the occurrence of phytotoxicity. The locust is about one week from the beginning of its incubation to the end of its life. Can be used 3% imidacloprid (acetamiprid, Mobilang) EC 1500 times, 10% imidacloprid (WP) wettable powder 4000 times liquid spray control.

2, spring pharmacy dry: In the 20 days before flowering, can be used to prevent smear method. Engraving, the length of 15cm, between the bars 2cm. Can be used imidacloprid or omethoate 2 to 3 times liquid dry, the first time after the dry, then painted the second time, and then wrapped with plastic film. After 5 days of treatment, most of the aphids can be killed and the efficacy can be maintained for up to 50 days, which is a growing season. Note that the mulch should be removed in late May, otherwise it will cause the bark to rot during the rainy season.

3. Control after flowering: 7 to 10 days after flowering, when aphids are spotted in the garden, they are controlled. In addition to the above agents, it can also be used, 25% Aktai water dispersant 8000 ~ 10000 times, 50% anti-inflamy (avoid fog) WP 4000 times, 20% speed kill Ding (Fenvalerium Ester) 1000 times of EC, 10% of cypermethrin EC 1500 times, 5% of cypermethrin EC 1500 times, 2.5% of KOF Chrysanthemum EC 2000 times, and 5% of larvae EC 2000 times.

4. Biological control: Protect and use natural enemies for biological control. Common natural enemy insects include ladybugs, grasshoppers, florets, and bees.

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