Hello everyone, today is September 7, 2020, there is still a week or so before korla pear picking, but some careful growers have found a problem: some pears have moth-like pests on them, and their body color is gray-brown and dull. The forewings are densely covered with grayish-white scales, the base of the wings is black-brown, the leading edge has 10 groups of white twill, and the abdomen is grayish brown. In fact, this pest is called pear small heartworm, so what should we do in the face of this pest?
There are two main ways of this pest, one is the use of spraying, this method is relatively simple, effective, fast, but the cost is higher; the other way is more primitive, through the winter to remove leaves, fruit, thereby eliminating insect eggs; in summer, autumn, the grass under the fruit tree can attract most of the pear small heartworms and other pests, to achieve the purpose of protecting fruit trees and pears. This method is low cost, good effect, and pristine, but there is a disadvantage that is to put a little more fertilizer, and the grass under the fruit tree will compete with the fruit tree for nutrition.
<h1 class = "pgc-h-arrow-right" > method one: pharmaceutical control</h1>
When administering the drug, it is best to choose to carry out it in the evening on a sunny day or on a cloudy day throughout the day, and the effect of using 48% Lesben emulsion 2000 times, 2.5% cyanothrin vinegar 2000 times or 5% Ruijinte SC to control pear small heartworms is obvious. At the egg stage and the larval fruiting stage, spraying 20% filogenia diamide and 20% larvalurea can also control the harm of pear small heartworms.
<h1 class = "pgc-h-arrow-right" > method two: agricultural control</h1>
Pear small heartworms have the property of transferring hosts to harm, and try to avoid mixing peaches, plums and apricots with pears and apples. In winter, the leaves and fruit of the orchard are cleaned, the old warp skin is scraped off, and the deep burial or burning is concentrated to eliminate the overwintering larvae. In the early stage of larval occurrence, it is necessary to cut off the victims in time and burn them in a concentrated manner, remove the pear containing the insects in time, and destroy them centrally. After the fruit is harvested, the garden should be cleared to eliminate the source of small heartworms and insects. In summer and autumn, the grass under the fruit tree can attract most of the pests such as pear small heartworms to achieve the purpose of protecting fruit trees and fragrant pears.
<h1 class="pgc-h-arrow-right" > extension (1</h1>).
Biological control: The natural enemies of pear small heartworms mainly include red-eyed bees, white cocoon bees, black lapis lazuli wasps, parasitic bees, flat-stranded wasps, bees and white zombies. Red-eyed wasps are released in orchards to control small pear heartworms, and the egg parasitization rate can reach 40-60%. Spraying white zombie powder in orchards to control overwintering larvae, the parasitization rate of overwintering larvae reaches 20-40%; especially in orchards with high humidity, the parasitization rate of overwintering larvae in rhizome soil is as high as 80%.
<h1 class="pgc-h-arrow-right" > extension (2</h1>).
Physical control: Because adult insects have phototropism, color vision effects and chemotaxis, black light lamps, yellow sticky worm boards, traps (the core of the trap is sexual pheromones) or sweet and sour liquid plus a small amount of insects in the orchard can trap adult insects. Before fruit removal, tie grass piles on the trunks to trap overwintering larvae and concentrate on treatment before spring. During the expansion phase of the fruit, whole ears are bagged to prevent adult pear heartworms from laying eggs on the fruit.
<h1 class="pgc-h-arrow-right" > tips:</h1>
1. When the drug is prevented, the fruit farmers should be careful, first watch the wind direction, choose to work in the morning or evening, the effect of high temperature weather is not good.
When physical prevention and control, it is necessary to use electricity safely to avoid unexpected things.
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