The cause of herbicide damage, on the one hand, this land is not suitable, the management of water slurry can not be carried out according to the requirements of the relocation of paddy fields. On the other hand, it has been a large number of single drugs for a long time, and some weeds have different degrees of resistance. In order to improve the control effect, blindly increase the amount of herbicide. After the occurrence of phytotoxicity, brassinolide, diacetate, indapamide, cabbage and water-soluble trace elements can be sprayed 1 to 3 times to promote the growth of injured seedlings as soon as possible.
Rice blast and flax leaf spot mainly cause brown leaf spot in rice leaves, plant growth can be reduced, and drugs such as tricyclazole can be used for prevention and control. Viral diseases mainly include stripe leaf blight and black streak dwarf disease. Stripe leaf blight mainly manifests as chlorosis, wrinkling, distortion and non-extraction. Black streaked dwarf virus is mainly dwarf plants and dwarf green leaves. The control carrier such as Laodelphax striatellus is combined for drug protection, and a mixture of chlorpyrifos and morpholine hydrochloride is used as a spray mixture.
The main pests causing rice seedlings are rice worms and rice locusts. The rice weevil larvae eat rice roots. Adults bite rice near the surface of the water. After being pumped out of the injured heart, they produce a row of small holes, and the leaves of the rice are broken in severe cases. Rice thrips suck the leaf juice of rice, the tip of the leaf is small, the leaves are yellow when the leaves are severe, and the growth of the plants is weak. Chlorpyrifos can be used to control rice weevil and rice thrips. Zinc deficiency mainly manifests as dwarf plants, new leaves grow slowly, the base or midrib is green blind, the upper leaves are narrow and thin, and the middle and lower leaves are brown. In severe cases, all leaves are brown.
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