Dichocrocis punctiferalis Guenee (also known as Dichocrocis punctiferalis Guenee), also known as peach aphid, peach aphid, commonly known as heartworm, carnivora, is a lepidoptera Moth family. The worms are widely distributed and distributed in the Yangtze River basin and various areas south of China. In addition to harming the fruits of fruit trees such as peach, apple, pear, plum, plum, plate millet, walnut, apricot, persimmon, fig, litchi, longan, mango, pineapple, pomegranate, alfalfa, hawthorn and other fruit trees, it can also harm sunflowers, Corn, sorghum and so on.
Hazardous? The larvae invade from the fruit pedicle or fruit and leaves, fruit and fruit, and enter the fruit heart after introgression. There is a large amount of insect feces and yellow-brown glue inside and outside the victim fruit. After the larvae are mature, they are often plucked at the stalk or at the junction of the two fruits.
Morphological characteristics: The adult body is about 12 mm in length. The whole body is bright yellow. There are many small black spots scattered around the wings. There is a cluster of black hairs on the tail of the male moth.
Oval oval-shaped, about 0.6 mm long, milky white at the time of first birth and later reddish-brown. The larvae are 15–20 mm in length when they are cooked, and have a pale reddish body, with thick gray-brown spots on all body sections.
The cocoon is about 12--15 mm long, brown, and has 6 spurs at the end.
Life history and habits: Mature larvae winterize in sunflower seeds and corn, sorghum culms and stubbles; adult nighttime activities, strong phototaxis; trees with dense foliage and more fruit, and two fruits Spawn more at the office. In early maturing varieties, the eggs are usually seen earlier than those in medium- and late-maturing varieties.
The northern region takes 2-3 generations a year. In the south, it takes 4-5 generations a year. The first and second generation larvae damage the peach fruit, and the third and fourth generations damage maize, sorghum, sunflower and other crops. The adult overwintering period is mid-to-late May. The late-May to early-June period is the first generation of egg peaks. Later generations overlap for generations.
Control methods
1 In winter, crop residues such as corn, sorghum and sunflowers are timely burned to eliminate overwintering larvae.
2 Prune the peach tree reasonably and leave fruit reasonably to avoid sticking the leaves and fruit.
3 spray about prevention and control: not bagging the orchard, to master the first and second generation of adult spawning spray spraying. Effective agent: 50% killer pine emulsion 1000 times; 50% phoxim EC 1000 times; 2.5 deltamethrin 5000 times; 2.5% Kung Fu EC 3000 times. Different types of peach trees have different time to victimization. Therefore, the time and frequency of spraying are also different. According to Nanjing's experience, generally early-maturing varieties carry drugs twice, the first time in late May and the second between mid-June. The medium-maturing varieties sprayed three times, the first time in early June, the second between mid- and late June, the third time in early July, such as early July harvest, the third time do not have to spray. Late-maturing varieties sprayed 4 times, the first time in June, the middle, the second time in late June, the third time in July, the middle, the fourth time in late July.
4 Master the bagging protection before wintering adult (before late May). It can prevent pests such as peach borer, pear borer and leaf roller moth.
5 In Taoyuan, corn, sorghum, sunflower and other crops must not be intercropped to reduce the source of insects.
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