Grasshoppers are intermittent outbreaks, migratory and omnivorous pests. According to expert consultations organized by the National Agricultural Technology Center, in 2014, the grass larvae larvae occurred in the eastern part of Inner Mongolia and the north of Xinjiang, and the northwestern and northern parts of China and the northeastern part of the country took on lesser light. The farmland and its surrounding areas were approximately 10 million mu. Does not rule out the possibility of local serious occurrence of the invasion of foreign insects. In order to do a good job of prevention and control, this plan is specially formulated.
First, prevention and control goals
The heavy-occurring area controls the large-scale cluster migration hazards of grasshopper larvae, and the emergency control and treatment rate reaches over 90%, the control effect reaches over 85%, the damage loss is controlled below 5%, and the damage loss in the middle and low density areas is controlled below 3%. Ensure that the grasslands are not affected by the farmland in the normal area and the farmland in the accidental area does not cause serious damage.
Second, prevention and control strategies
Block foreign insects and control local insect sources. The control of larvae is mainly supplemented by trapping and killing adults. Strengthen emergency prevention and control of public areas around farmland.
Third, prevention and control measures
(I) Prevention and control of key areas
1. Larvae focus on prevention and control areas. Altay and Hetian of Xinjiang, eastern Inner Mongolia and Midwest, northern Shanxi, northern Hebei, northern Ningxia, northern Shaanxi and Heilongjiang, Jilin and Liaoning.
2. Overwintering adults in key prevention and control areas. Central and western Inner Mongolia, northern Hebei, northern Shanxi, Altay in Xinjiang, Liaoning, Jilin and Heilongjiang and other northern agricultural areas and agricultural and pastoral areas.
(II) Main technical measures
1. Ecological regulation technology. In wintering areas, autumn plowing and winter plowing are applied to break wintering sites. Uncultivated crops such as buckwheat, buckwheat, oysters, etc. are used for ecological control.
2. Light trapping adult technology. In the field of grassland and winter overwhelming adults and key areas of foreign adults and insects to land, install insect traps and other physical trapping tools in advance, kill insects in time and reduce the base of insects. Lights should be placed in areas where the line of sight is wide and there are no obstructions around; where corn plants such as beans, beans, sunflowers and sorghum are planted in places rich in nectar, the height of the ampere height is preferably 20 cm above the top of the surrounding main crops.
3. Trench barriers and sprays to prevent larval migration. Grassland mites are severely affected, preventing larvae from migrating from grasslands, wasteland, forest belts, and degraded pastures to farmland. Lands that are not victimized or where there are few larvae and some larvae are infested by larger pests are in danger. Implement methods for trenching, spraying medicine, and vertical membranes to prevent diffusion hazards.
4. Weeding, weeding and ovulation techniques. For non-eating crops such as grass crops and potatoes, weeds were cleared of field weeds before spawning. For grazing and foraging crops such as hemp, beans, sunflower, etc., in the spawning period combined with cultivating and weeding eggs, the removed weeds are taken out of the field or concentrated. Attention should be paid to the removal of weeds such as Polygonaceae and Polygonaceae, and at the same time, we must pay attention to the removal of weeds at the Tanabe mantle and clipped land to prevent larvae from moving into farmland. In the field where the larvae have hatched, it is necessary to fight drugs before weeding to prevent the larvae from being transferred to the crops.
5. Chemical control technology. Before the 3rd instar larvae (about 10 days after the initial stage of egg growth), matrine and beta-cypermethrin were sprayed for control. In severely affected areas, drug isolation and emergency prevention and control were used to centralize annihilation, timely treatment of larval unevenly distributed plots, and attention was paid to the prevention and control of larvae in the fields of Tanabe, Tajikistan and Abandoned Land.
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