Underground pests are a large class of agricultural pests that are difficult to control. As the name suggests, they are all underground, eating crop seeds, roots, stems and shoots.
Underground pests include four major categories: cockroaches (chafer larvae), golden worms (larvae of stag beetles), crickets, and tigers. Underground pests can cause the lack of seedlings, ridges, dead plants or plants to die, which is very harmful. There are certain differences in the hazard conditions, such as the roots and roots of the bite-feeding crops, and the fractures are relatively neat; the golden worms bite the seeds, germs, and rhizomes to form small holes; the crickets are eaten in the spring. Seeds or germinated seeds, also feed on the young roots of the young stems, the roots of the roots are chaotic, and the locusts are often excavated near the ground, forming a ridged tunnel to make the roots of the seedlings vacant; the larvae of the ground tigers, lurking in the topsoil or between the soil blocks during the day At night, the hazard is unearthed. The hazard is characterized by biting off the base of the stem of the crop. According to the above characteristics, combined with the captured bugs, they can be correctly distinguished.
Reasonable control of planting density, ploughing and ploughing, rational use of fertilizer, avoiding application of unfertilized organic fertilizer, timely irrigation, removal of weeds in wasteland and other measures can inhibit various underground pests.
The cockroach adult chafer, the adult tiger moth and the cockroach of the ground tiger have phototaxis, and can be trapped by black light and projection insecticidal lamps. 80% trichlorfon wettable powder 0.05 kg and fried fragrant bean cake 5 kg, with appropriate amount of water to form a poison bait, in the evening to spread in the murdered field can be trapped tigers; wheat bran plus trichlorfon, made bait, can be trapped and killed Sugar, vinegar, liquor, and water are mixed in a ratio of 6:3:1:10, and a small amount of stomach-toxic pesticides are added to make sweet and sour liquid. One dish per 200 square meters of seedlings can trap many lepidopteran pests. .
In areas where cockroaches and golden worms are severely affected, for example, soybean seed coats can be seeded at a ratio of 1:75 or 35% methylthiophosphorus according to the seed amount of 0.5% of the seeds, and the seeds are suffocated.
In the field where the hazard is found, it can be ground with 75% phoxim 1000-1500 times solution, chlorpyrifos (48% lesbian emulsifiable concentrate) 1000 times liquid or 250 ml 50% phoxim emulsifiable concentrate per acre. It can be used for soil treatment, ditch application, hole application, covering soil and watering with 3 to 4 kg of butyl thiocarbamate (5% good winter granules). In addition, trichlorfon, avermectin, chlorpyrifos (Millol), and propylphosphorus (Yishubao) have good insecticidal effects and can be used alternately.
Bowl Mill,Diamond Bowl Grinding,Diamond Grinding Stone,Diamond Grinding Tool
Hengshi Diamond Tools CO.,LTD , https://www.ryomaltools.com