The scientific name Chi10 infuscatellus (Snellen) belongs to the order Lepidoptera. Alias â€‹â€‹in the north is said to be the millet ash, and the south is called the sugar cane rake. Distribution of Northeast Plain, Inner Mongolia Plateau, North China Plain, the middle and lower reaches of the Yangtze River Plain, Sichuan Basin and Taiwan Mountain.
The host is responsible for the damage of sugarcane in the south and millet, millet, alfalfa, corn, sorghum, alfalfa and foxtail in the north.
The damage characteristics of seedling larvae damage sugarcane growing point, resulting in the dead dead heart and dead heart seedlings; the germination period, the early stage of tillering caused by lack of plants, the effective number of stems decreased; the growth of late larvae damage the stems, destroy the stem tissue, affect the growth and The sugar content decreased, and the windy sugarcane plant was easy to fall. In addition, sugarcane red rot is also easily induced at the wound site.
The morphological features of the grain pests are as follows:
Living habits Zhejiang 3-4 years old, Guangxi, Guangdong 4-5 generations, Taiwan 5-6 generations, 6 generations of Hainan, with mature larvae or pupae in the cane stems in winter. 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 are damaged during the elongation of sugarcane, they are cut into the cane stalks to form a damaging section. When the stalks are larvae, the larvae first scrunch the tiny round holes in the joints, and then penetrate into the damage. Longitudinal section shows that the stem is straight, often straight through several sections, and there are few crossways, which is different from the curved tunnel caused by the damage of the yellow peony. After 4-9 times of larvae, the larvae are old and mature, and they are in the cane stems. When the new sugar cane is not cultivated, the larvae are usually 6-7 cm away from the soil surface. The insect prefers a dry environment.
Control methods (1) Agricultural control 1 Select high carcinogenic insecticides with strong anti-insect power, such as caramel 69/421, pick 703, South China 56/21, and Pingsha 68/22. 9 Reasonable layout. Planting sugarcane in winter and spring should not be arranged near the fall sugarcane field to reduce the spread of this insect. 2 To promote paddy crop rotation in accordance with local conditions. 4 Stayed in the sugarcane field, low sugarcane stalks, timely treatment of cane heads and residual stems, to eliminate overwintering larvae in the underground. 5 timely peeling leaves. (2) Biological control. Release red ants. It is also possible to release Trichogramma twice each during the spawning period of the 1st and 2nd generations. The length of the cane is extended 1 or 2 times, 10,000 heads per 667m2, and 5-6 release points are arranged. Bees were released 8-9 times in the year. (3) Use of sex pheromone trap In the southern sugarcane field, a trapping basin is placed every 667m2, and artificial sex hormones are put into it to trap and kill a large number of male moths that come to mating, and female moths cannot be mated. (4) Use 3% carbofuran granules per 667m24-5kg or 3% methylisotriphos granules 5-6kg, 3% Yingjia granules (carbofuran, methyl isohexadiosal) 4-5kg 5% of insecticidal double 5kg, respectively, in the next species and Shizu base fertilizer, the uniform application of one of the above pesticides. (5) Grasp the spraying of 90% crystals of trichlorfon 500-800 times or 50% of baicalin WP 1000 times, 50% of chlorfenulfuron EC 1000 times during the hatching period of eggs. 25% of the insecticidal water-repellent 200 times, 50% of easy-to-enable soluble powder 100g, and 40-50kg of water.
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