Rice Chironomid Control Methods

Alias: Red bug, red nematode. The main hazards are larvae damaging the young roots and shoots of rice, resulting in floating seedlings, and feeding unemerged seed embryos and endosperm, so that the seeds can not germinate, and rice seedlings and live fields suffer serious damage. The distinguishing feature is a small moth whose wings are shorter than the body. When resting, the forefoot is lifted up and swings up and down. The larvae are red or yellowish, and there is a limb in the ventral surface of the chest. Chironomidae occurs two or three generations per year. The first generation is harmful to rice and winterizes in the weeds with eggs or adults. Adults appeared in early May of the second year and spawned in late May. Eggs hatched in 3-4 days were larvae and endangered. In 1999, due to the low temperature in the early stage, the seedlings were prolonged after the seedlings were inserted, resulting in the occurrence of rice rock-claw mosquitoes in Changtu County, Liaoning Province, and in 7 townships such as Tongjiangkou Township, Taiping Township, Changtuzhan Township, and Baoli Township. The rice suffered from varying degrees of damage, covering an area of ​​1,100 mu. The seedlings were lightly growing, and the white roots were small and short. The leaves had 10%-20% withering, and all those who died were dead with yellow. Prevention and control methods 1, agricultural control Drainage drying field 2-3 days, can suppress the damage of rice rock-climbing mosquitoes; change the water-raising seedlings into drought-raising seedlings, can reduce the damage of rice Chironomid. 2. Chemical control 1 Use 10-15 grams of 90% crystal trichlorfon, add 10-15 kilograms of water, and spray in rice paddy when the water depth is about 4 cm. 2 After draining the field water, stop for one day and hang a small bag filled with trichlorfon for irrigation at the inlet. When irrigation depth is about 3-4 cm, stop irrigation and plug the inlet. After 12 hours, kill the larvae. 3 1 kg of 5% phorate granules per acre, mixed with 15 kg of soil (sand) Yansa, can also treat other pests, the effect is very good.

Paraquat

It is an organic compound with the  [(C₆H₇N)₂]Cl₂. It is classified as a viologen, a family of redox-active heterocycles of similar structure. Paraquat was manufactured by Chevron. This salt is one of the most widely used herbicides. It is quick-acting and non-selective, killing green plant tissue on contact. It is also toxic to human beings and animals due to its redox activity, which produces superoxide anions. It has been linked to the development of Parkinson's disease. The name is derived from the para positions of the quaternary nitrogens. Paraquat may be in the form of salt with chloride or other anions; quantities of the substance are sometimes expressed by cation mass alone (paraquat cation, paraquat ion).

Agricultural Paraquat

Agricultural Paraquat,Agricultural Pesticide Products,Agricultural Spray Herbicide Additive,Paraquat Synergist Agent

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