I. Morphological characteristics and hazards
There are thousands of species of earthworms, of which earthworms are most common in the north. It is also known as black kite, known, spider, autumn kite, and cymbal. The genus Homoptera is genus. Adults are 40-50 mm long and 120-130 mm long. They are black and shiny. The top three heads are amber and triangular. The compound eyes are pale yellow-brown. The antennae are bristle-like. The pronotum is more than the mid-thoracic. The plate is short, broad in the middle chest, and has a central bulge. The foot is yellowish-brown. The wings are transparent, the veins are yellowish or dark, and the front fins are light yellow-brown. Male buzzers will buzz, sounds are loud, females have no buzzers, and ovipositors are developed. Eggs are about 2 mm long, slightly curved, milky white, and the egg period is about 10 months. The larvae (nymphs) commonly known as monkeys or turtles are known. The body of the larvae appears to be adult, light brown without wings, but it has winged buds that can crawl.
Adults began to emerge in June. They infested and endangered forests such as willow, poplar, sorghum and alfalfa, and fruit trees such as apples and pears. They used sucking mouthparts to suck the sap of trees and lived for 60-70 days. Males and females sing to attract heterosexual mating and die. Females lay eggs in the xylem of the shoots from July to August. Each egg has 4-8 capsules and 80-90 capsules on one shoot, often resulting in the death of the victim's shoot. The nymphs hatch in the middle of June of the following year. The nymphs fall into the ground and dig into the earth to suck the juice of the roots of the trees. After living in the soil for a few years, the old nymphs drilled from the soil in the night of June to August to climb to the trunk. Peeling feathers become adults, the wings are soft when the first feathers are infested, and they generally fly hard for a period of time after being inhabited for a period of time, and they have a strong phototaxis.
Willow shoots usually die of water loss and dryness, and severely contaminated shoots account for 50% of the middle shoots, affecting pruning and expanding canopies, sucking stem and root nutrients, and affecting tree growth.
Second, prevention and control measures
Due to its strong migration ability in production, simple drug control often has unsatisfactory results. Comprehensive prevention and control measures must be taken and emphasis must be placed on group prevention and treatment in order to receive good results.
1. Tape prevention and control: At the beginning of nymphs, stick a plastic tape about 5 centimeters wide at the base of all the trunks of the orchard and around 5-10 centimeters from the ground to prevent nymphs from getting on the tree and catch nymphs under the trunk at night or early morning. Or the newly emerged adult, eat or sell, 600-800 can be caught one night.
2, light trapping: the use of adult phototaxis strong, the next night in the tree to ignite or light lighting, and then vibrate the branches (the tree can climb to the tree fork vibration), the adults fly to the fire or light, and more One can also catch 600-800 a night.
3, gluten sticky catch: The wheat flour into a dough with water, and then rub repeatedly in the water until no starch (white juice) Serve gluten, put in a small plastic bag, and then find a 3-5 meters of bamboo Sticks or sticks, with a little gluten pre-prepared on the top, to dry the surface of the water, try to dip with your fingers, if the gluten sticks, you can hold up the bamboo rod, and slowly use the sticky gluten stick from the back of the pimple Stick the insects' wings and put them together after sticking. Generally, they can stick around 1000 a day.
4. Sprinkle under the trees: Before the nymphs were unearthed in early June, under the orchard or the surrounding forest (especially willows, eucalyptus, and indus), 1000 times 50% of phoxim, the effect is also very good, and can also treat other pests .
5, spraying pesticides: Adult stage combined with the prevention and control of other pests, spraying 1000 times Peach Xiaoling or pyrethroid pesticides, can kill some adults.
6, foreign matter drive: adult stage, the different colors of the slender plastic straps fixed on the tree tops, with the wind floating, so that adults are frightened to escape the orchard, reduce harm.
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