Technical advice on pest control in rice at the booting stage

The main pests and diseases of rice in the Tinghu District are: three generations of rice leaf roller, three generations of giant salamander, three generations of brown planthopper, sheath blight, early maturing indica rice, rice blast, second generation of rice stem borer, rice smut, three generations of white back Fly, white leaf blight, etc. According to the survey, three generations of the vertical field system has two pre leaf borer moth hair peaks, August 5 moths began to rise again, 6-7 August hair moth into the peak, the peak of the mu Catches were 270, 330 head, Aug. 14-15, is expected to enter the young larvae peaks, medium to large emphasis occur; end of July early -8 survey, the second generation of PSB 13.2 acres residual amount of insects (0-50 head), larvae and pupae according to progress forecast eggs hatch three generations PSB peaked in August 17-18, middle light occur; two adults of the second generation of the brown planthopper peaks occur on July 28-31 and August 6, insects amount is not very high, but has check to see short-winged adults, three generations of young nymph is expected to peak appeared in the August 13-15 and August 21-23, middle light occurs in the future if adults continue to add moved, the degree of occurrence will further increase; white backed planthopper imbalance occurs between plots, August 5th, 9th survey, general Bai Xue plots the average amount of insects 28.9 (0-100 head), a few plots Bai Xue insect amounted to more than 500, light - lighter occurred; in the second generation of paddy rice stem borer insect adult emergence peak in the beginning of August 7-9, August 12-16 summit, the eggs hatch the beginning of peak, peak period will Respectively, in August 14-16, August 19-23, light occur; the recent hot weather will continue, rice sheath blight lesion expansion continues aspect, the condition will be further aggravated, if not control, seriously ill Tian the "run through" lodging; nitrogen fertilizer high side of rice this year, rice song made ill more likely, as early as 5-7 days before planting rice fields in time to break drug prevention; early maturing rice varieties August 15 On the 20th , it will enter the stage of breaking the heading, and it is necessary to take the initiative to prevent rice blast. All localities should pay attention to the characteristics of pests and diseases in the rice booting stage this year, earnestly do a good job in investigation of insects and seedlings, classify and guide, and do a good job in prevention and control to ensure the harvest of autumn harvest. The specific prevention and control techniques are as follows:

Adhere to the prevention and control strategy of “actively attacking, treating upper and lower pressures, treating both diseases and insects”.

First, the object of prevention and treatment : Indications of three generations of vertical leafhoppers, three generations of giant salamander, three generations of brown planthopper, sheath blight, early maturing indica rice, rice blast, concurrent treatment of second-generation sorghum, rice smut, three generations of whitebacked locust, four generations of ash Fly cockroaches, etc., to cure bacterial leaf blight.

Second, the control object field: all paddy fields

Third, the control period: August 15-17. For rice fields with high yields of three generations of leafhoppers, the control time can be appropriately advanced.

Fourth, the choice of drugs and methods of application

Prevention and control of rice leaf roller, big cockroach: 60% A Wei can be used per acre ? Single kill alone WP 80 g; 50% or use phenthoate added 100 ml of 90% EC ethiofencarb 50 g or 26% emamectin • Chlorpyrifos emulsion 80 ml of water was added 50 g of 90% or ethiofencarb 1.8% Abundant emulsifiable concentrate 100 ml plus 90% insecticidal 50 g mixed control. In the sericulture area, 40% triazophos emulsifiable concentrate should be used for prevention and control of 100-120 ml per mu .

Control rice planthopper: use 25% pymetrozine wettable powder 20-30 grams per acre or 6% nitenpyram wettable powder 6-8 grams. The sericulture area should be controlled by a single dose of pyridoxine.

Prevention of sheath blight, false smut: 12% Jinggangmycin mu selected • difenoconazole wettable powder 80 g or 50% thiophanate-methyl alone 100 ml; 30% or benzyloxy • propiconazole suspension 20 ml plus 15% validamycin A • 100 ml December bud agent mix. In the paddy field where the sheath blight is serious and has not been broken, 30 ml of 27.8% of thiafurdinazole suspension can be used for prevention and control.

Control rice blast; use 75% tricycloazole wettable powder 30-40g per acre .

Control bacterial blight: Tetracyclines mu metallocene with 20% suspension 100 g of water spray per acre, continuous medication 1-2 times.

Five, matters needing attention

　　 1. It is strictly forbidden to use highly toxic and highly toxic pesticides and their compounding agents. When applying the medicine, avoid high temperature period and do a good job of protection against poisoning accidents. Do not use in high winds and when it is expected to rain within 4-6 hours.

　　 2. When the thiophanate-methyl is applied, it is strictly prohibited to transfer the liquid to other crops.

　　 3. It is strictly forbidden to use insecticides and their compounding agents in sericulture areas. To use a safer drug, avoid contaminating the mulberry leaf with the drug at the same time.

　　 4. Do not apply the medicine when the leaves of the rice have dew or rain, otherwise the control effect will decrease.

　　 5 , prevention and control of brown planthoppers have been used to produce high resistance to buprofezin, chlorpyrifos and their compounding agents.