Control of peach borer on jujube tree

Also known as peach bark borer, peach spot borer, omnivorous pests, distributed all over the country. The larvae harm the fruits or seeds of many kinds of plants such as winter jujube, peach, plum, persimmon, chestnut, apple, pear, pomegranate, Hawthorn and so on. When the fruit is damaged, it is full of insect dung, which causes rot, and when it is serious, it has a great impact on the yield and quality.

The eating habits of peach are miscellaneous, the occurrence period is long, and the damage is often transferred in areas with a variety of hosts. There are 2 generations a year in the north, 3-4 generations in Huang-Huai region and 4-5 generations in the Yangtze River Basin. In Shandong Province, the second and third generation larvae are the most harmful to pomegranate, jujube, winter jujube, peach, and the second generation is harmful to sunflower, corn and all kinds of fruits. Overwintering with mature larvae. The adults of the overwintering generation in North China emerged in May of the following year, lying still in the dark during the day, and mating and spawning at 8: 10 pm at night. The eggs are mainly laid in the calyx, and 1 to 6 eggs are scattered. Most of the newly hatched larvae feed into the fruit from the calyx or hidden places such as compound fruit and sticking leaves. According to the survey, 0% of the fruit was eaten from the calyx mouth. The larvae have the characteristics of turning to the main harm. After maturing, the larvae often form long oval white silk cocoons in the damaged fruits or between the fruits and in the cracks in the bark, and pupate in the cocoons.

Kill the overwintering larvae. Scrape the bark and plug the hole in the tree in early spring. Timely treatment of sunflower disk, corn, sorghum and other residual plants to eliminate overwintering larvae and reduce insect sources. Pick up the fallen fruit and pick up the damaged fruit, concentrate on retting fertilizer, and use black light to trap and kill adults.

Spray 1000 times of 50% phoxim or 1200 times of 50% dichlorvos emulsion during adult occurrence and peak spawning periods, or use pyrethroid pesticides. The first generation larvae were sprayed with 1200 times of 50% prednisone 40% dimethoate emulsion at the initial stage of hatching and sprayed once more after 1 week, and the effect was good.

Using 50% phoxim or 20% pyrethroid or 90% trichlorfon 0.5 kg soil and 10 g water, and medicine mud to block the calyx tube, not only for the control of the first generation larvae, but also for the second and third generation larvae, valid for 70-80 days. Taking advantage of the strong tendency of peach borer oviposition to sunflower disk, some sunflowers were planted in orchard to induce adults to lay eggs and kill tea wing bug and white star turtle at the same time.