The yellow caterpillar is the larvae of the whitefly moth, also known as the golden caterpillar and the long hair hairy spiny locust, which occurs throughout the country. Four generations occurred in one year, and there were hazards from June to September, which was the most serious from June to July. The initial larvae ate only the epidermis of the leaves, and they were incomplete due to growth and scattering of the foraging leaves. The growth of the plants weakened. Larvae about 35 mm in length, head black, yellow chest, hybrid red or black spots, a red vertical stripes on the back, body tufted yellow hair, hair poisonous, itching after the human body contact swelling, difficult to scratch when scratching Forbearance can be wiped with juices such as the Eight-Treasure King Leaf, Swallow Palm Leaf, and Small Wood Aloe Leaf, which has a mitigating effect. Adult white, body length of about 18 mm, wings about 35 mm long, up to 40 mm, abdomen with a cluster of yellow hair, forewing with 2 dark brown lines behind the edge. Scarring of larvae in the furrows of the bark.
Control methods:
(1) When the initial larvae have not yet spread out, remove them together with the leaves. As the insect grows and spreads, it has hanging habits and is easy to find. When the leaves were found to be spotted or incomplete, they looked for insects to kill. The adult period is pure white, easy to find, and can be killed manually.
(2) When pruning on the occasion of autumn and winter, it was found that the egg blocks were concentrated and washed away.
(3) In September and October, weeds are bundled on trunks to trap and kill adult insects.
(4) spraying 20% ​​killing chrysanthemum vinegar emulsifiable concentrate 3000---4000 times, or 80% dichlorvos emulsifiable concentrate 1500-1800 times, 50% killing spruce pine emulsifiable concentrate 1200^-1500 times, or 50% carbaryl Wet powder 500-600 times liquid to kill.
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