Two o'clock, the main damage in the south of sugar cane. The seedling larvae damage the sugarcane growing point, causing the dead heart to form dry dead seedlings; the germination period, the early stage of tillering cause the lack of plants, the effective number of stems is reduced; the larvae kill the cane stalks in the middle and later stages, destroy the stem tissues, affect the growth and contain sugar The quantity dropped, and the windy sugarcane plant was easy to fall. In addition, sugarcane red rot is also easily induced at the wound site.
Sugar cane in our province has occurred in 3 to 4 generations in the following year. In the southern sugarcane planting area, the worm is damaging throughout the year. The adults prefer to lay their eggs on the back of sugarcane leaves. Newly hatched larvae disperse or crawl or spin silky, sneak into the leaf sheaths of neighboring sugarcane plants, and then drill sugarcane strains from leaf sheaths. When the larvae damage during the growing period of sugarcane, they are cut into the cane stalks to form the damaging section. When the stalks are larvae, the larvae first smash the small round holes in the internodes and then enter the damage. Longitudinal section shows that the stems are straight, often straight through several sections, and there are few crossways. The larvae have 4 to 9 times of molting, after aging, the larvae are in the cane stalks. When the new sugar cane is not cultivated, the phlegm is usually at 6 to 7 cm from the soil surface. The insect prefers a dry environment.
Control methods:
1 Agricultural control, promote paddy crop rotation in accordance with local conditions.
2 After harvesting, the sugarcane harvested the stubble, dead leaves, and dried seedlings before the end of February of the following year in a timely manner. The composting or burning of the sugarcane was not allowed to stay in the sugarcane field, and the cane head was plowed and burned in place to eliminate the overwintering larvae in the underground.
3 Peel off the leaves in a timely manner, remove from the field and kill eggs and newly hatched larvae.
4 Use of pheromone traps, placing a trapping pot per acre, and placing synthetic sex hormones, can trap a large number of males that come to mating, causing females to not mating.
5 In the case of applying the base fertilizer after the next seeding, select a non-pollution granule pesticide application, such as good for the winter, purple Dan, guarding the net and so on.
6 In the hatching period of egg hatching, spray high-efficiency, low-toxic and low-residue counterpart pesticides to sugarcane stem sections, such as Ruijinte, Shanrui, Baixieqing and Xieji 2000.
The above methods can treat sugarcane jaundice, sugar cane strips, corn borer and other pests.
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