Four pests and diseases that rice must pay attention to this year

rice blast

Occurrence period: When the field is first seen in the tillering stage, the application of the leaf mites is applied, and the mites are applied 3 to 5 days before the rupture, and the sputum is applied again every 7 to 10 days.

Control method: spraying with tricyclazole, albendazole, Fuji No. 1, epoxiconazole and the like.

Malignant disease

The occurrence period: the bacteria attached to the surface of the seed or the inside of the seed for wintering, or the bacteria on the latent straw can also survive the winter. After sowing seeds, the seedlings will suffer.

Prevention and treatment methods: (1) In the early stage of the disease, spray with 4000% of the carbendazim water agent 4000 times. (2) Remove diseased plants, diseased plants and diseased plants to avoid infestation of seedlings.

Chilo suppressalis

Occurrence period: The tillering period is 8-10% when the rate of the sheath is 8-10% or the rate of the sheath is 3%. The first generation of larvae in our province is harmed in the middle and late June, and the second generation larvae appear in early August.

Control method: When the amount of insects is low, Bacillus thuringiensis (Bt) and Bacillus thuringiensis are preferred, and the chemical agents may be selected from chlorantraniliprole, emamectin benzoate, triazophos and the like.

Sheath blight

Occurrence period: prevention and control when the rate of disease at the end of the tillering of rice and 20% after the end of the season.

Control method: using Jinggang · wax bud, Jinggangmycin A (24% A high content preparation), Shenzinmycin and other biological agents, or benzoyl propiconazole, epoxiconazole, copper copper epoxiconazole, A drug such as enequinone or tebuconazole is sprayed.

Other common pests and diseases of rice

Rice false disease

Occurrence period: The last leaf of more than one-third of the whole field of the stalk is taken out, which is commonly used as “big package” (about 5 to 7 days from the earing time), which is the peak of the initial infection of the disease. When you seize the opportunity to use the drug in time; in the beginning of the rupture, re-medication.

Control methods: (1) before the heading, use 18% chlorhexone powder 150 ~ 200g or at the end of the rice booting stage, use 14% lycopene copper water 250g per rice, rice fengling 200g or 5% Jinggangmycin water 100g per acre. Water 100 kg.

(3) 40% Heshunling WP can be used, 60-75g per acre, 120kg water, and rice sheath blight. Tricyclazole or carbendazim can be added during application to prevent sputum.

Rice planthopper

Occurrence period: Rice planthopper occurs in the province for 3 generations in 1 year, the first generation from late June to July, the second generation in late July, the third generation in August, and the third generation in August The heaviest.

Control method: spray with imidacloprid, nitenpyram, pymetrozine, chlorpyrifos, poisonous octyl oil and other agents.

Rice leaf miner

Occurrence period: mainly affected by the first and second generation larvae, that is, the first and middle larvae of the larvae in June; the first generation in early August is the second generation larvae.

Control method:

(1) Remove weeds from the fields, reduce wild hosts, and reduce the number of insect sources.

(2) When the field occurs seriously, the method of draining the sun is used to control the damage and spread of the leaf miner.

(3) In the adult stage, the use of acetamiprid, insecticidal double, Akzo, Amy Le and other agents for prevention and treatment.

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