(1) Hazards and hazards
Carrot microtubules commonly known as tired insects, oil insects, smaller and soft body. When the tapeworm feeds, the slender mouthparts are inserted into the leaves to suck juice, and the affected parts remain intact. However, the leaves will appear curled and shrunk. Some leaves have dense yellow dots and spots, and the leaf color turns yellow. In severe cases, Yellowish shedding.
(2) Morphological characteristics
Wingless, female, female, with a body length of 2.1 mm, yellow-green or khaki, was thinly powdered. There are tiles on the antennae and short hairs on each section. The abdomen is short and curved, with no grain. The tail piece is conical, the middle part is not constricted, there is a spiky pattern, there are 6-7 slender hairs, and the winged female is 1.6 mm long, yellow-green, with thin powder, and the antennae are very long. The veins are normal, and the abdomen shows no sudden protrusion. The tail piece has 6-8 hairs. The other features are similar to those of the wingless mantis.
(3) The law of occurrence
More than 20 generations occurred in 1 year, and wintered on eggs such as honeysuckle and northern sea cucumber. After wintering, the overwintering eggs infested the wintering hosts in the early spring. In May and July, the medicinal materials such as windbreak, Bupleurum, Angelica sinensis, and cumin were damaged. In October, winged mothers and males were born and migrated to the overwintering host to lay eggs for winter. North Sea Ginseng is the middle host of carrot microtubules, and it is also the winter host. Overwintering eggs are attached to leaves, petioles, leafhoppers and heart leaves for winter.
(4) Control measures
Clearing the park in winter, the dead plants and leaves will be buried or burned. During the occurrence period, spray 10% imidacloprid WP 2000-3000 times, or 3% acetamiprid EC 2,000 times, or 25% AKT 5000-10000 times, or 20% methrin EC 3000 times liquid, spray once every 7-10 days, spray several times continuously.
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