Octagonal Pest Control Act

Octagon is a special economic tree species in the South Asian subtropical region of China. It is prone to pests and diseases. If the control is not timely, it will result in serious reduction of production.
One, octagonal octopod is a leaf-feeding pest, which is generally serious. Seriously, even eating the leaves of the entire eight-corner forest, resulting in reduced production or death of the whole plant.
1. Morphological characteristics. Adults are moths, their antennae are filiform, their wings and their bodies are covered with gray scales, and there are dark spots between them, and there are round spots in the middle of the hind wings. The body of the female moth is shorter than that of the male moth and the eggs are small, flat and light yellow. The larvae are yellow-green when they are old and brown spots are scattered throughout the body. There are 2 to 3 "10"-shaped spots on the back. Brown-red, with a forked thorn at the end.
2. Living habits. 3 to 4 generations occur in 1 year and the wintering of pupa or larvae occurs. Adults are hidden during the day, night activities, and phototaxis are weak. Adults spawned about 300 eggs, and eggs were produced on the back of the leaves and the eggs were 6 to 13 days old. Young larvae can only eat the leaves on the back of the leaf and eat the entire leaf after 4 instars. The larvae droop downwards after being disturbed. Old mature larvae phlegm and shoot in places where the soil is loose or under the leaves.
3. Control methods (1) Manual control. Use a hooked bamboo pole to hook the branches and shake them so that the larvae will fall to the ground and then apply a glue ring 6 to 10 centimeters wide at 30 to 60 centimeters from the ground to obstruct the insects and then put them on the tree. The adhesive was mixed with 1 part of tung oil and 1 part of turpentine. Concentrate the landing larvae and burn or write poultry feed. You can also dig in the winter, loose soil 10 cm deep, 5 to 8 months to dig 6 cm loose soil. Before loosening the soil, induce the earthworms to remove the earthworms in the loose soil, and then cover the soil with 6 cm and a little solid to prevent its feathering.
(2) Drug control. With 4.5% high efficiency cypermethrin 800 ~ 1000 times liquid spray, or with 2.5% kill Po 1000 ~ 1500 times liquid spray.
The adult larvae and larvae of the octagonal and golden locust all bite the tender octagonal tender leaves. When the larvae are relatively light, the leaves are crunched. In severe cases, the leaves and shoots are eaten, causing the whole plant to die.
1. Morphological characteristics. Male body length 9 to 12 mm, width 5 to 7 mm, abdomen smaller, oval body, egg yolk or brown-yellow; Coleoptera soft, metallic luster, small head, chewing mouthparts, dark brown, skull There are two small dark spots, compound eyes black, hemispherical; antennae filamentous, a total of 11 nodes; pronotum trapezoidal, on which there are two more obvious small dark spots; sheath wings wider than the chest, the middle slightly enlarged, Hemispherical, with 10 block dark spots. The female body is 12 to 14 mm in length and 7 to 9 mm in width, and the abdomen is enlarged and has a false death habit. The eggs are oval in shape with 20 to 35 lumps, prolific in cracks in tree forks, leafhoppers, and barks. Eggs are taupe in the same color as the bark. The instar larvae have a body length of 2.5-6.5 mm and a head width of 0.4-0.6 mm. The newly hatched larvae are dark yellow and become eggs yellow after 2 or 3 days. The spots are obvious; the mature larvae are hypertrophic and have a body length of 13-18 mm. The head is 1.2 to 2 mm wide. Oblate, with the eggs as the background color, dense blue-black patches, arranged in five longitudinal bands, the larger plaques on the dorsal line, the plaques on the sub-line and the valve line are smaller, and the head is dark brown. The abdomen has yellow eggs with 3 pairs of thoracic feet and a sucker-like abdomen at the end of the abdomen. The dragonfly is naked, nearly elliptical, 7-9 mm long, pale yellow, mostly in the loose soil around the tree roots in the earthen chamber, the earth chamber is 1.5 to 3 centimeters deep.
2. Living habits. One generation occurred in 1 year, and the egg was overwintering in the branches. In early March, the eggs begin to hatch. From mid-March to mid-April, they are hatching. In late April, they begin to phlegm. The pupa period is 10 to 15 days. After emergence, the adults mating and hatching in late June. And eclosion is very irregular, larvae often appear at the same time a few larvae, eggs up to 8 months or more, the adults are more active at sunrise and early after the rain, quiet at noon and evening in the leaves, scared off To the ground suspended animation.
3. Control methods (1) Manual control. Artificial adult hunting. Using a large bamboo tube and a loading funnel, a small hole in the lower part of the bamboo tube is surrounded with a white cloth so that there is a slight light penetration. Using the pseudo-dead habit and hi-light of the insect, the bamboo tube contacts the body of the insect, and the golden flower insects fall into the bottom of the bamboo tube. No longer fly, collected and burned. In addition, the eggs were harvested manually using the characteristics of the egg-laying period of 7 to 8 months, and the eggs were prolific in the characteristics of branches, leafhoppers, bark cracks, and trunk lichens. In May, when the trees are tended, the grass and loose soil are excavated.
(2) Drug control. In the flat terrain, use invincible hand 1000 times liquid or Zhongkemei 1000 times liquid spray.
(3) Biological control. The Beauveria bassiana is applied in the early morning or after the rain in high temperature and high humidity.
Third, the octagonal tunnel insects The insects eat octagonal bark annularly, the excrement of excrement in the tree epidermis to form a protective layer, and then drilled into a tunnel, and finally in the tree horns inside the hole squat hole hiding: the victim tree weakened, and bear fruit less. Control methods can be used invincible 1000 times liquid spray.

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