Heartworm moths are harmful to the fruit, which is seriously harmful to the yield and quality of peaches. It is one of the key pests of peach trees, and is now classified one by one, first of all, let's talk about peach small heartworms.
Peach small heartworm alias peach moth, peach moth, the victim fruit commonly known as monkey head, sugar filling, bean paste filling, through the common name, we have a clear understanding of the symptoms of the harm of the peach. The larvae are mostly mothed into the fruit from the bottom of the fruit, and the larvae 'moths' flow out of the moth holes for 2 to 3 days after the moth holes flow out of the bead-like pectin, also known as the flowing eye, after the pectin is dried, forming a white powder. As the fruit grows, the borer holes automatically heal to form small black spots. The larvae moth the flesh inside the fruit, forming a curved worm path. Larvae infested during the expansion of the fruit form a deformed fruit, called lion's head fruit. If it is harmful during the fruit formation period, the fruit is not deformed, but the worm road is full of reddish-brown insect dung, commonly known as bean paste filling.
The morphological characteristics of the peach are small, and the peach is divided into several stages of worms, eggs, larvae, pupae, and cocoon. Harm the fruit with larvae. The old mature larvae are 13 to 16 mm long, fat, milky white or orange-red, the head is yellowish brown, there are few bristles, the toe hooks are 10 to 24, and each body segment has obvious black spots.
Occurrence pattern and living habits Old mature larvae overwinter in the soil as winter cocoons, and the larvae have backlighting. Overwintering larvae generally begin to emerge after the valley rains, starting when the temperature reaches 19 degrees and when the soil is moist. It is closely related to soil moisture and, if dry, has a great impact on larval excavation. When the larvae emerge from the soil, the temperature is high and the humidity is high, and the insect infestation occurs early.
Prevention and control measures Targeted prevention and control according to the small life habits of peaches and the period of occurrence of pests. To completely eliminate the overwintering larvae, pay close attention to the prevention of smelting under the tree. Timely tree control.
1 Disinfect the ground soil to kill the larvae unearthed
2 Cultivate soil, weed, and prevent adults from feathering. Reduces feathering of adult worms.
3 Chemical control. In the larvae, eggs and moths into the fruit spraying, general insecticides are OK, in the adult egg laying, incubation period should also do a good job in drug control.
4 In the treatment of insect fruits, it is necessary to concentrate on proper treatment of diseased and insect fruits to reduce the feathering and egg laying of adult larvae.
5 Biological control Peach small early belly cocoon bee, Chinese tooth leg ji bee, red-eyed bee are the natural enemies of peach small heartworm.
Of course, we must do a good job in predicting the insect situation according to the local climatic conditions, focusing on the prediction of the larval excavation period and the egg stage, so as to provide an accurate time basis for timely and effective prevention and control.