Pericarp plume moths in the south of the Yangtze River area claimed by the fruit growers as "little haha ​​insects" and "small migratoria". In addition to damaging the damage of apples, pears and other trees to the grapes in some areas, it is more serious in some areas, the main foraging sites are 1-2 The main stalks of annual branches and spikes, especially those with extensive management, are more serious. First, the morphological characteristics. The adult body is blue-black, with orange-yellow bands at the junctions at the top of the head, neck, hind chest, and abdomen. Adults have an average body length of 20 mm and a wingspan of 30-36 mm. Their forewings are reddish-brown and their veins are black. The posterior fins are transparent and are called "transmeans". The egg is oval in shape, slightly flat, slightly concave above the surface, and has a textured surface. The larvae have a body length of about 30 mm, a cylindrical shape, a reddish-brown head, a yellow body in young age, a slight purple-red color in the old mature period, and an inverted "eight" shape pattern on the pronotum. The dragonfly is a long oval with a reddish-brown body and is about 18 mm long. Second, the law of occurrence. Perched feather moths occur one generation a year, and the older larvae overwinter in the pith part of the vine. In early May of the following year, the original overwintering area was rehabilitated. Feathering and drilling vines began in June. Males and females mated and spawned on young shoots. The larva first feeds at the base of the petiole and then penetrates into the interior of the dried vines to kill it. This causes the dendrite to be destroyed and affects the transport of water and nutrients up and down, leaving the upper part of the affected area dead and the leaves yellow. And shedding or vines are broken at the victim's place. After the formation of a long hole in the victim's area, it quickly expanded and there was a small amount of insect excrement. The larvae endanger the site for a long time until entering the overwintering state from September to October. Third, prevention and treatment methods. It is more difficult to control after invading. Therefore, it should be better to control the insects before and after spawning and before hatching eggs. 1. Combine the winter pruning and burn the damaged vines together with the overwintering larvae. If you do it carefully, you can achieve excellent control. 2, combined with the garden cleaning, stripping the old skin and deciduous debris and other debris, reduce spawning suitable sites, and lay the foundation for the application. 3, in the larvae out of vines hatching adult period, spray organic phosphorus pesticides 1-2 times in a timely manner. Eradication of adults and eggs, control of the number of insects. 4. In June, observe whether there are yellow and focal edges in the leaves. If wormholes are found at the base of the leaves, the leaves may be taken off and the small larvae just waiting to be smashed will be killed. When it is found that the vines have faeces, the worms should be immediately killed with buds and wire. 5, dressing cotton wool (plastic foam ball can also be) soaked. Its approach: a little soaked in cotton 100 times the dichlorvos solution and immediately removed, wrapped in the victim area, and wrapped with a plastic film to prevent the liquid outflow. Not only can the larvae be killed, but also the normal growth of the dendrite that has recently become harmed. 6, liquid injection pest control. For plants with serious damage, 2-4 spurs of each main vine can be drilled 10-15 cm from the ground during the sap flow period (after injury stops). Partially downwards 40-50 degrees, so that the liquid flow, prevent siltation. Then, dimethoate (such as parathion and methamidophos) can be formulated as a 10-20-fold aqueous solution, and the medical solution can be used to inhale the liquid into the wells. 5 ml. Immediately after liquid injection, the effect of sealing the hole with adhesive tape is better. (Slurry sealing can also be used.) When the pests have formed harm in the shoots, injection method can also be used to directly inject the drug into the holes from the stool, but the concentration of the drug should be 100. Around the time, after the injection, it can be blocked. 7, drug smear. For the larvae, the damage to the larvae, the cotton balls (plastic foam can also be used), immersed in 5-10 times the dichlorvos agent, directly smear hazards, there are also insecticidal effect. Medication time should be in late May - early July, the period of pest damage, should not be used before fruit harvest.
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