What does the pear psylla fear most? Teach you effective control methods

Friends who have never planted pear trees are relatively unfamiliar with the pear psylla, while those who grow pear trees at home should be fairly familiar with it. It is one of the main pests of pear trees in China, mainly because the larvae suck the sap from pear tree leaves and tender shoots, seriously affecting the yield and quality of pears. So what does the pear psylla fear most? How to control it?

I. Introduction to the pear psylla

1. When does the pear psylla occur?

The pear psylla generally occurs in early spring in February to March when it emerges from overwintering, with mid-March being the peak emergence period, and it begins laying eggs at the leaf scar before the pear tree buds. The peak damage period is June to July.

2. What harm does the pear psylla cause?

It causes indirect damage to pear tree leaves, producing brown spots that lead to early leaf drop, while also contaminating the fruit, seriously affecting the yield and quality of pears.

II. What does the pear psylla fear most?

If you want to kill the pear psylla, you need to use its natural enemies to eliminate it. The natural enemies of the pear psylla include parasitic wasps, green lacewings, ladybugs and minute pirate bugs and other insects, which are also the insects the pear psylla fears most; using them can also have a certain control effect on the pear psylla. By using methods such as sex pheromone trapping, sugar-vinegar trapping, and trunk application of pesticides during April to June when egg-laying and parasitism occur to control fruit borers and aphids, avoid spraying pesticides in order to protect Encyrtidae wasps; you can also collect parasitized pear psylla nymphs in September, store them in a low-temperature box, and take them out for release in early April of the following year.

What pesticides does the pear psylla fear most? Chemical control should focus on spraying during the overwintering adult emergence period, that is, mid-March, and the peak hatching period of the first generation of nymphs, from late April to early May. You can choose 10% imidacloprid wettable powder or 5% acetamiprid soluble powder.

III. How to control the pear psylla?

In early spring, scrape the bark and clean the orchard, and gather the scraped bark together with dead branches, fallen leaves and weeds to burn or bury deeply, so as to eliminate overwintering adults and reduce the pest population density. The key periods for pear psylla control are as follows:

1. The pear psylla begins activity around mid-March, when the pear flower buds and scale leaves begin to show white. The peak emergence period is around Qingming Festival, when the pear psylla feeds and causes damage on the current year's tender shoots.

2. It is mid-to-late May and early June, which is the peak occurrence period of adults and larvae. At this time, the pear psylla is often submerged in the mucus it secretes itself, or hides in curled tender leaves to cause damage, and the pesticide solution is not easy to contact the insect body, making control difficult at this time.

3. The third generation is in early July, the fourth generation is in mid-August, and the fourth generation of pear psylla begins overwintering.

The pear psylla generally occurs more severely in dry years.

Summary: The above content is an introduction to what the pear psylla fears and control methods, hoping to help fruit farmers and growers in need. This article is compiled from the internet.