The Prevention and Control Techniques of Pterilanthus Piricola

October 24, 2022

The pear yellow mealworm, also known as pear yellow mealworm, only harms pear and pear fruit trees. Small size, adult length of 0.7 mm, bright yellow, obovoid, short antennae, 3, short, black, mouth length, even beyond the end of the abdomen, the egg is smaller, only 0.3 mm long, pale yellow. Pygonidae is affected by adults and nymphs in fruit pods and stems. The fruit surface of the affected area is sunken, and then black rots and rots, resulting in cracking large black pods. This results in a decline in fruit quality and partial or complete loss of commercial value.

Manually prevent old pear bark from scratching before sprouting in early spring, remove tree attachments and eliminate overwintering eggs. After fruit thinning, timely bagging.

Before the bagging agent is sprayed, the insecticide is thoroughly sprayed 1 to 2 times to prevent the aphid from slipping into the bag. If there is an insect in the bag after bagging, the new bag should be set up after the bag is sprayed with insecticide. The available agents are: 10% imidacloprid wettable powder 3000 to 4000 times, 3% acetamiprid EC 2000 to 2500 times, 48% chlorpyrifos 2000 times, 20% fenvalerate 3000 times, or 20% fenpropathrin emulsifiable concentrate 4000 times. For orchards that have been drilled into the bag but are less harmful, they should be sprayed on the fruit bag and its nearby leaves and sprayed with impermeable insecticides such as imidacloprid and acetamiprid, which have strong permeability.
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