Seedbed
   Hazard characteristics: biting seeds that have just been sown or sprouted, biting the polyphagous pests of the seedlings after emergence.
 Control method: Seeds soaked and germinated with 35% butyl thiocarbazone seed dressing 2 g / kg or 3% Mobilan seed dressing, the ratio of the drug is 2 ml / kg, or seedling bed with Rui Jin special 10 ml / 100 square meters with water spray.
   Leaf miner
   Damage characteristics: small rice leaf miner, also known as leaf miner, the northern provinces of rice producing areas with more potential food mesophyll larvae, insects per leaf has at least two to three, as many as 7 to 8, early occurrence For a long time, the dead leaves and rot of rice leaves affect the normal growth of rice and cause the production to decrease, resulting in a large number of deaths of rice seedlings.
   Control methods: ( 1 ) remove weeds. In the spring and autumn, we clear the weeds in the edge of the Tanabe and reduce the source of insects, which can reduce the damage of the leaf miner. The hazard of the Honda leaf fly is sun-dried or submerged, which can play an insect-preventing role. ( 2 ) Chemical control. Planting seedbed spraying with drugs, in 2 to 3 days before transplanting of rice, Dimethoate 40% EC of 15 ml / 100 m2 spraying, or 3% Mo Bilang 1000 times; paddy rice seedlings according pests after transplanting Investigate and decide on the appropriate period of control, spray with 40% dimethoate emulsifiable concentrate 1125 ~ 1500 ml per hectare , or 40% trichlorfon crystal 1500 ~ 2250 g with water spray. Use up to 3 times, with a security interval of not less than 7 days.
   Negative mud worm
   Hazard characteristics: The rice negative mud worm is commonly called the back worm, which is a common insect pest in rice in Heilongjiang Province. The larvae and adult worms harm the rice, and feed the mesophyll along the veins, causing white longitudinal marks, which cause the whole leaves to turn white and even rupture. Rotting, resulting in lack of seedlings, even if it survives, will cause rice to be late, affecting yield.
   Control methods: ( 1 ) Remove weeds in the edge of the Tanabe and reduce the wintering place and insect source of adults. ( 2 ) Artificial control. In the midst of a negative mud worm, when there is dew in the morning, use a broom or a long tree strip to sweep the worms to eliminate the larvae. ( 3 ) Chemical control. After transplanting, the rice seedlings should be investigated frequently. Once adult insects are found to be harmful and have a tendency to increase, they should be sprayed. If the adult insects are not harmful, the larvae should also be sprayed before they begin to harm. Drug control, available biological agent Sudley 150 ml / 667 square meters with water 200 times spray; Baxter 500 times liquid or 60% insecticidal monoamine 60 g / 667 square meters with water 500 times liquid spray.
   Chinese rice blast
   Hazard characteristics: Chinese rice blast occurs in all rice regions in China, and is dominated by adult worms.
   The leaves are eaten into nicks, and the leaves are all eaten up. After the heading, the rice stems can be bitten; the rice stems can cause white rice, and the milky rice can be bitten into a broken shape.
   Control methods: ( 1 ) When the spring is in the field, the egg pieces floating on the water surface will be removed and then buried deep into the soil. ( 2 ) Remove weeds from rice fields and rice fields to reduce the source of insects in wintering places. ( 3 ) Using artificial methods such as net catching, tapping and capturing to eliminate pests and reduce pests. ( 4 ) In the first ten days of July , the use of pharmacy joint defense, 5% Regent, 30 ml / 667 square meters with water spray, or 25 % Huifeng Keke 30 ml / 667 square meters with water spray; 30% Mobilan 30 ML / 667 square meters with water spray.
   Rice bran
   Hazard characteristics: 螟蛉 is also known as the double-bearing noctuid, the common name of the stepworm, the blue ruler. It occurs in all rice producing areas in China, and the larvae damage the rice leaves. In severe cases, the leaves can be eaten up, which seriously affects the yield, and the yield is generally reduced by 5% to 10% .
   Control methods: ( 1 ) Remove the wintering place of pests and reduce the source of insects; remove the grassland after the autumn harvest and early spring, weeds in the ditch, collect the scattered and piled straw and burn it in a concentrated way to eliminate the wintering place of pests. ( 2 ) Light trapping. In the period of adulthood, use black light to trap. ( 3 ) Chemical control. It is usually carried out at the age of 2 to 3 years of larvae . Apply 25% kungfu emulsifiable concentrate 15 ml / 667 square meters to water spray, or 2.5% enemy killing water agent 15 ~ 20 ml / 667 square meters for water spray. ( 4 ) Biological control. Use the Trichogramma to kill the eggs, and the velvet bee kills the larvae.
   Chilo suppressalis
   Hazard characteristics: Chilo suppressalis, also known as borer worm, stalk worm, occurs in rice areas throughout the country. The larvae drilled rice plants feed on leaf sheaths, rice stalks, etc., and they form different dams after being affected at different growth stages. “Bold heart†and “white rice†affect production.
   Control methods: ( 1 ) Eliminate wintering places and reduce insect sources. After the autumn or early spring, the rice roots are smashed, the stems are burned intensively, and the amount of insects can be reduced by turning the springs and pouring deep water. ( 2 ) Filling deep water to kill cockroaches. The stem borer and stem stalks are not high in the water surface, so the deep water in the larvae can be used to eliminate the insects and reduce the number of feathered adults, thus reducing the damage of the larvae. ( 3 ) Remove the victim strain early to eliminate the larvae. ( 4 ) Chemical control. To catch the larvae after hatching, the time before the drill collar hazard is used to fight the medicine, you can use Regent 40 ml / 667 square meters to spray with water.
Â
Â
Sand Paper,Sanding Paper,Automotive Sandpaper,Automotive Abrasives
GUANGZHOU SUNPLUS TECHNOLOGY CO.,LTD , https://www.sunplussandpaper.com