Control of Pyrus fulva

Pear yellow powder aphid, also known as pear yellow powder insect, is only harmful to pears and pear fruit trees. The adult is 0.7 mm long, bright yellow, obovoid, antennae short, 3 nodes, feet short, black, mouthparts long, even beyond the end of the abdomen, eggs smaller, only 0.3 mm long, yellowish. The pear yellow powder aphid harms adults and nymphs in the calyx and pedicle depressions of the fruit, where the fruit surface is sunken, and then blackens and rotts, forming a large black scar, resulting in the decline of fruit quality and partial or complete loss of commercial value.

Artificial control of early spring pear tree germination before scraping off the old bark, remove tree attachments, eliminate overwintering eggs. Bagging in time after thinning fruit.

Spray insecticide thoroughly once or twice before bagging to prevent aphids from being bagged. If insects are found in the bag after bagging, unpack the bag and spray it to kill the insect and then re-cover the new bag. The available agents are: 10% imidacloprid wettable powder 3000 times, 3% acetamiprid EC 2000 times 2500 times, 48% chlorpyrifos EC 2000 times, 20% fenvalerate EC 3000 times, or 20% fenpropathrin EC 4000 times. For orchards where aphids have been drilled into bags but less harmful, spraying imidacloprid, acetamiprid and other highly permeable internal insecticides should be aimed at the fruit bags and their nearby branches and leaves.