Control of peach moth

Peach borer, also known as peach borer, peach borer, peach borer and so on. It belongs to Lepidoptera, Pyralidae.

1. Morphological features: the adult is about 12mm long, with a wingspan of 22mm and 25mm, orange-yellow, with more than 20 black spots on the front wing and more than 10 hind wings. The egg is oval, milky white at the initial stage, and turns reddish brown before hatching. The larva is 22 mm long, dark brown on the head and neck, light red on the back, and several light brown spots on each segment of the body. The pupa is about 13 mm long, brown, and there are 6 curly buttocks at the end of the abdomen.

two。 Symptoms of damage: the larvae eat the fruit, and the eggs are laid between the two fruits or at the junction of the leaves. After hatching, the eggs enter the fruit from the shoulder of the fruit or the junction of the two fruits. One fruit can be eaten into 2 larvae, and the serious ones can reach as many as 8 to 9. The larvae have the habit of turning to fruit and eating. The damaged fruit secretes tawny transparent glue juice from the wormhole and excretes feces around the wormhole. When the damage is serious, it is commonly known as "ten peaches and nine borer", resulting in fruit drop and yield reduction.

3. The occurrence regularity can occur 4-5 generations a year in the south of China and 2-3 generations in the north. Overwintering with mature larvae in sunflower disk, stalk or corn, sorghum and other plant remains. It pupated in April of the following year, the pupal period was about 8 days, and it emerged into an adult in May. Since then, it occurred once in late June, early August, early September to early and middle October (south). Then the larvae began to overwintering one after another. If there are corn, sorghum, sunflower and other crops near the peach orchard, the damage can be transferred from the second generation. The larval stage is 15-20 days, and cocoons are formed between fruits and fruit branches after ripening, and the pupa stage is about 8 days before emergence into adults. Adults lay eggs between fruits and leaves, and can also be transferred to sunflower disk or sorghum ear to lay eggs. The egg period is about 6-8 days, and the larvae continue to do harm after hatching.

4. Prevention and control methods.

Winter treatment of sunflower, corn, sorghum and other crop straw to eliminate overwintering adults. Before the emergence of the overwintering generation (the first generation) adults, bagging the fruit in time. The adults were sprayed once or twice during the Eclosion and spawning period. Good control effect can be obtained by using 3000 times of 20% butyl EC or 1000 times of 50% fenitrothion emulsion and 5000 times of 2.5% deltamethrin.