In recent years, it can be clearly felt that winter is not particularly cold, and the influence of factors such as climate warming has made apple insect infestation more and more serious. For example, the peach small heartworm, its reproductive ability is enhanced, the generational heavy phenomenon is obvious, after harming the apple tree, resulting in more and more abnormal phenomena, seriously affecting the yield and quality of apples, and even directly losing the value of commodities and edible value.
<h1 class = "pgc-h-arrow-right" >1, life habits</h1>
Peach small one year can occur 1-2 generations, with old mature larvae as a cocoon overwintering, mainly distributed in the topsoil layer and on the trunk, overwintering larvae to the end of May of the following year began to emerge, and then at the base of the trunk, soil blocks, grass roots near the spit silk knot summer cocoon pupa, half a month later feathering adult worm, adult occurrence period is relatively long, there is about 1 month. Adults begin to lay eggs in the calyx of the fruit after 1-3 days of appearance, and the larvae climb on the surface of the fruit after hatching for a while, and begin to bite the peel and burrow into the fruit, causing the fruit to fall.
<h1 class= "pgc-h-arrow-right" >2, hazard symptoms</h1>
Generally, small peaches will not be transferred to other fruits as a harm, but will only cause harm to one fruit. Now the fruit surface leaves a large needle tip moth hole, the hole has a white pectin residue, dried into wax powder. After the young fruit is mothed into the fruit, it begins to erode, and finally reaches the ventricle, eats the seed, affects the expansion of the fruit, the fruit surface is uneven, commonly known as "lion's head fruit", the later fruit surface has a fruit hole, the fruit remains insect feces, seriously reducing the quality of the fruit. While the larvae moth, they leave the feces in the worm passage, causing bean paste filling and making the fruit lose its edible value.
< h1 class = "pgc-h-arrow-right" >3, prevention and control measures</h1>
(1) Configure poisonous soil, plough the land, kill some of the overwintering pests, and reduce the density of insect populations; before the wintering larvae are unearthed, the soil at the base of the root neck is pulled apart by 15 cm and the overwintering cocoon on the surface of the bark is scraped; when the first generation of larvae are defruited, combined with the pressure of green manure, the soil is cultivated on the tree disc and the summer cocoon is crushed.
(2) During the period when the larvae are harmful to the fruit, check more on the ground, regularly remove the insect fruit, pick it once every 10 days, take the insect fruit on the tree, and all the fallen fruits on the ground out of the orchard for deep burial treatment, control the occurrence of larvae and kill the larvae in the fruit; within 1 meter of the trunk, the layer of 10 cm of the fight, lure the peach small to come here for wintering, after the completion of the wintering, the overwintering insect cocoon will be buried deeply.
(3) Bagging protection of the fruit, completed before the adults lay eggs, and bagged in early September to reduce pest damage; when the overwintering larvae are unearthed, the trunk is covered with mulch film within 1 meter, compacted with soil, controlled and reduced the larval excavation, pupae, adult feathering, and further reduces the number of pests.
(4) You can use black light, sweet and sour liquid or sexual attractants to trap adult insects, the effect is better; at the same time, you can use natural predators to control pests, plant crops favored by natural enemies in orchards, attract to the garden, swallow and kill pests.
(5) Late May to mid-to-late June, 2-4 days after rain, after cleaning the tree tray, sprinkle poisonous soil on the ground of the tree disc, sprinkle after the hoe; use sexual attractants to hunt adult insects 3-5 days after the peak period, spray octylthion on the trunk, hunt adult insects; when the egg and fruit rate is 0.5-1%, in addition to sweet and sour liquid, it can also be controlled with Cyperm no. 6 and Suurea No. 1; when the larvae have just hatched, use Lesbene emulsion, permethrin emulsion, cypermethrin emulsion oil for prevention and control, spray once every 7 days, 2 consecutive times, in mid-August to september, with Lesben When the egg fruit rate is 1-1.5%, it is sprayed immediately, and it can be controlled with peach spirit emulsion or cypermethrin emulsion.