What are pear planthoppers most afraid of? How to prevent and cure it?

Friends who have not planted pear trees are relatively strange to pear planthoppers, and those who plant pear trees at home should be more familiar with pear planthoppers. It is one of the main pests of pear trees in China, mainly because the larvae feed on the leaves and twigs of pear trees, which seriously affects the yield and quality of pears. What are pear planthoppers most afraid of? How to prevent and cure it?

Introduction of pear planthopper

1. When did the pear planthopper occur?

Pear planthopper usually occurs in early spring from February to March, and unexpectedly begins to lay eggs at the ten leaf marks before the pear tree germinates in the middle of March. The peak period of damage is from June to July.

two。 What is the harm caused by pear planthopper?

Make pear leaves cause indirect damage, brown spots and early defoliation, at the same time pollute the fruit, seriously affect the yield and quality of pear.

Second, what is the pear planthopper most afraid of?

If you want to kill the pear planthopper, you need to use its natural enemies to remove it. The natural enemies of the pear planthopper are parasitic wasps, grass ridges, ladybugs, flower bugs and other insects. They can also be used to control pear planthoppers. In April-June when spawning parasites, sexual trapping, sweet and sour trapping and branch spraying were used to control heart-eating insects and aphids to avoid spraying to protect jumping wasps. Parasitic pear planthopper nymphs can also be collected in September, preserved in low-temperature boxes, and released in early April of the following year.

What kind of medicine does pear planthopper fear most? The key points of chemical control are the dormant period of overwintering adults, that is, the middle of March and the peak hatching period of the first generation nymph from late April to early May. 10% imidacloprid wettable powder and 5% acetamiprid soluble powder can be selected.

Third, how to control pear planthopper?

Scrape the bark in early spring, clean the orchard, and burn or bury the scraped bark, litter and weeds in order to eliminate the overwintering adults and depress the population density. The key periods for the control of pear planthopper are as follows:

1. The pear planthopper begins to move around the middle of March, when the scales of pear buds begin to appear white. The peak period of dormancy is about Ching Ming Festival, when the pear planthopper feeds on the shoots of the current year.

two。 It is mid-late May and early June, and the occurrence of adults and larvae is at its peak. At this time, pear wood lice are often submerged in their own mucus, or sneak into the curled tender leaves, the liquid is not easy to touch the insect body, and the prevention and control is 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 planthopper begins to overwinter.

Pear planthopper generally occurs more seriously in dry years.

Conclusion: the above content is about what the pear lice are afraid of and the prevention and control methods, hoping to help the fruit growers in need. This paper is integrated with the Internet.