Peach borer is a lepidoptera borer insect, commonly known as borer heartworm, adult body surface scattered many black spots, similar to leopard print, also known as leopard stripe borer, is an important borer pest of peach trees, but also for pear, plum, apricot, persimmon, pomegranate, loquat, hawthorn and other fruits, as well as millet, walnut, corn, sunflower and other crops. The larvae moth into the fruit for feeding, the affected fruit is full of insect feces, which is very easy to cause cracking and rotting, which seriously affects the quality and yield. The insect overwinters as an old mature larvae in a thick cocoon in dry fruit, trunk branches, tree holes, under the skin, under the soil blocks, and corn stalks, corn cobs, etc.
3 generations in Hebei, Shandong and Shaanxi, 4 generations in Henan, and 4-5 generations in the Yangtze River Basin all overwintered in cocoons in the remnants of corn, sunflowers and castor. In Henan, a generation of larvae is first pest on peach trees in late April and late June, and 2-3 generations of larvae can be pests on peach trees and sorghum. The fourth generation is infested on summer sown sorghum and sunflowers, with 4 generations of larvae overwintering, the following year the overwintering larvae pupate in early April, late April into the pupal peak, late April to late May feathering, overwintering adults lay eggs on peach trees.
From mid-June to late June, a generation of larvae pupates, a generation of adults began to appear in late June, entered the peak of feathering in early July, followed by the second generation of eggs, when spring sowing sorghum ears and flowers, mid-July is the peak of the 2nd generation of larvae. The second generation of feathering is in early and mid-August, when the spring sorghum is nearly mature, the late sown spring sorghum and early sown summer sorghum are pumping flowers, the adults are concentrated on these sorghum to lay eggs, the third generation of eggs hatched at the end of July and the beginning of August, and the third generation of larvae entered the peak period of 3 generations of larvae in mid and late August. At the end of August, 3 generations of adult insects appear, and in early to mid-September, the sorghum and peach fruits have been harvested, and the adults lay their eggs on the late summer sorghum and late-ripening sunflowers, and from mid-September to early October, they enter the 4th generation of larval occurrence as a pest period, and the temperature drop in mid- and late October is overwintered by 4 generations of larvae.
Physical control
1. Remove overwintering larvae: In the middle of April every year, before the overwintering larvae pupate, remove the remnants of host plants such as corn and sunflowers, and scrape the bark of apples, pears, peaches and other fruit trees, burn them centrally, and reduce the source of insects.
2. Fruit bagging: Spray once before bagging in combination with the control of other pests and diseases to eliminate the eggs laid by the early peach borer borer.
3. Booby trap adult insects: using the phototropism and chemotaxis of adult insects, sweet and sour liquid and black light can be used to trap adult insects, with 5 pots of sweet and sour liquid per acre and 20w black light lamp 50 acres of a lamp is appropriate.
Sweet and sour liquid configuration method: use 1 part of brown sugar, 5 parts of vinegar, 0.5 parts of wine, 10 parts of water to make sweet and sour liquid, bottle and hang on the tree at a height of about 1.5m, trap peach borer borer, leaf curl moth, red-necked celestial bull, dish and other pests.
4. Tie old sack pieces or grass flies to the trunk, lure larvae and pupae, and collect and destroy them at any time.
5. Pick up and destroy the fallen fruit and remove the insect fruit to eliminate the larvae in the fruit.
chemical control
1.8% avermectin emulsion 5000 times liquid, 2.5% cypermethrin emulsion 2000 times liquid, 10% cypermethrin or 5% high efficiency cypermethrin emulsion or 20% methionate emulsion 1500 times liquid, 50% octathion emulsion 1000 times liquid, 25% urea 1500-2500 times liquid spray.
Biocontrol
Spray Bacillus thuringiensis 75-150x liquid or Cypercus 100-200x liquid.