Pollution-free control of American moth

Occurrence of regular life habits H. cunea adult head densely covered with white long hair, small moths, male body length 9 to 14 mm, wingspan 25 to 40 mm, female moth length 10 to 15 mm, wingspan 30 to 45 mm. Three generations took place in the Gifu prefecture in one year, and the winter passed through. Feathering begins in mid-to-late April, and the emergence period begins from early May to early June. The first generation is relatively neat. The larval period is from early May to late June. The second and third generations of the larvae are not neat, and the generations overlap. Larvae The peak period is from July to mid-August and from late September to early October. Under mature larvae, under the rough cracks, litter, stones and soil in the tree. Adults have phototaxis and tropism, and larvae have social habits, gluttony, superior adaptability and hunger tolerance.

Hyphantria cunea has the characteristics of the harm of knot formation. The newly hatched larvae produce silky nets in a few hours. They are attached to the leaves and form a white net screen on the trees. Several dozen or even a few hundred young larvae live inside the net. Leaf blade, leaves only leaves veins reticulate yellow. With the growth of larvae and the expansion of the scope of feeding, the net screen is continuously expanding. The screen diameter ranges from dozens of centimeters to more than 1 meter. In severe cases, the entire tree canopy is enveloped in a white screen. Attention should be paid to the difference between the caterpillar and the caterpillar of the sky. The caterpillar of the sky caterpillar knots at the branch, and is relatively small. It is generally not attached to the leaves. The larvae inhabit the net during the day and feed on the net at night, and then transfer to another branch after molting. Closing.

Non-pollution prevention and control technologies should adhere to the principle of prevention and comprehensive prevention and control, strengthen the monitoring of the epidemic, and make it possible to discover the first time. The first site will be treated as a rule, and the first generation of prevention and treatment will be highlighted.

Strengthen quarantine. The American white moth mainly spreads through long-distance human factors such as transportation and transportation. It is necessary to strictly observe the quarantine system, and in particular to strengthen the quarantine of agricultural and forestry products from the epidemic areas, and to control their spread and spread from the source.

Artificial cut net screen. Using the characteristics of the larvae's clustering and netting, before the larvae break through, the artificial nets are cut off and buried deep in the ground or burned with fire. The first generation of larvae occurred neatly, the screen was obvious, and it was easy to find. The removal of the first-generation screen was the key to the elimination of the disease throughout the year.

Light trapping. In combination with pest monitoring, the use of phototaxis during the generation of adult insects, and the installation of insecticidal lamps for trapping and killing, can effectively reduce the number of next-generation populations. Black lights are often used, and conditional automatic worm killers are available.

Attractants trap. According to the odor of adults, artificial attractants are synthesized, the odors emitted by the attractants are used to attract adults, and the pests are then combined with insecticidal lamps or sticky board.

Artificial digging. In the American white moth period, artificial digging methods can achieve better results.

Grass traps or slime traps. According to the habits of the mature larvae of tree larvae, the grass is cut at 1.5 meters in the trunk or trapped with larvae and concentrated to destroy.

Chemical control. Before the 4th instar larvae, biological pesticides such as low toxicity to humans and animals, 25% urinary excretion, etc. were sprayed on the trees.

Biological control. Utilizing natural enemies of the American moth can effectively control its spread. At present, the natural enemies that are promoted in the Tianjin area are the schistosoma japonicus, which has a high parasitism rate and good control effect against the American white moth and is suitable for large area control.

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