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Third, the prevention of brownback flat rat damage
For the prevention and control of brownbacked flat rodent damage, comprehensive prevention and control measures shall be adopted for “using forests as the basis, protecting natural enemies, and using chemical agents scientifically and prudentlyâ€.
(I) Forest Management
1. The pre-prepared land before forestation destroys the habitat of rats by line by block, making it difficult for the rats to hide and inhabit.
2. Artificially building a mixed forest to form a complex forest environment can not only reduce the food sources of rodents and hinder their rogues, causing them to lose their living conditions. It can also attract various natural enemies of forest rodents to live in the forest. Control the occurrence of rodent damage.
3, in the autumn to conduct a comprehensive cut irrigation, clearing the shrubs, weeds and litter of young forest, destroy the hidden environment of rodents, control effect can reach 95% or more.
(II) Chemical Control
For areas where the density of rats was higher, after the fall of frost in autumn, rats were busy with the period of stocking and used poison bait to trap and kill rodents. For the safety of humans and animals, slow-acting rodenticides, such as sodium salt of enemy mice and bromadiolone, are generally used. Prey can use wheat, corn residue and so on. The specific dispensing method refers to medication instructions. The method of administration can be equidistant from 5 to 10 meters square, with 20 grams per pile, and the killing effect can reach 85% or more.
(iii) Biological control
1. Protect the natural enemies of rats (godhawks, eagles, foxes, rabbits, leopard cats, snakes, hedgehogs, crows, red-billed gulls, magpies, etc.) to create environmental conditions conducive to the survival of natural enemies.
2. Apply P-1 repellent or other tree protection agent on the trunk of young children in autumn (the specific use method refers to the instructions for use of drugs). The prevention and treatment effect can reach 95% or more; apply the typhoid fever agent to the forest land to make the rats feel sick. To death, to achieve the purpose of rat protection.
(IV) Investigation and calculation of rodent control effects
1, mouse folder method investigation and calculation
(1) Investigate the control effect of biological rodenticides and microbial rodents used in chemical control (poison bait trapping) and biological control.
(2) Survey method: Prior to application, the capture rate (A) was investigated using the sandwich method, and the capture rate (B) was investigated on the ground in the same manner 7 days after the application, and the mouse disease control effect survey form a (see Table 3). 5).
(3) Calculate the rodent control effect (C), calculate according to the formula:
AB
C%= ─── ×100
A
2. Survey and calculation of the rate of infected plants
(1) Investigations on the effects of full-scale irrigation and biological repellents for forest management on rodent control.
(2) Investigation method: Survey the infected plant rate (P1 P2) in the control area and the control area 30 days after the prevention, and fill in the survey form for the control effect of the mouse pest (see Table 3-6).
(3) Calculate the rat-proof effect (C), and calculate according to the formula:
P2-P1
C(%) = ───×100%
P2
Table 7-12 Mouse Control Effect Survey Form (a)
Forest farm forest area, small place name
Linban/Small Class Size: Small Class Size: Sloping Slope Forest Age
The origin of forest composition distribution average number of acres per plant
Average (root) diameter at breast height, branch number, crown height, crown to dry ratio
Hazard level represents area pre-catch rate rodent density
Natural enemies
Prevention and Control Methods Prevention and Control Methods
Plot number
Rat clamps (a)
Number of captures
Daytime
Daytime
Daytime
total
total
Prevention of post-catch rate prevention and control of rodent density%
Control effect evaluation
Total investment cost per mu
Investigator: Date of Investigation
Table 7-13 Rat Control Effect Survey Form (b)
Forest farm forest area, small place name
Rapforest Class/Small Class Size: Small Class Size: Slope Aspect
Forest age distribution of forest composition
Average number of per mu (average height) Average number of thoracic (root) diameter shoots
Crown height ratio of crown to dryness represents area
Anti-pre-caught rate rodent density natural enemies
Prevention and Control Methods Prevention and Control Methods
Plot number
Control area
Plot number
Prevention zone
Survey the total number of trees
Number of plants killed
Damage rate %
Survey the total number of trees
Number of plants killed
Damage rate %
1
1
2
2
3
3
4
4
5
5
6
6
7
7
total
Control effect %
Control effect evaluation
Total investment cost per mu
Surveyor: Survey Date:
Dtmade Manufacturing Co., LTD , https://www.dtmade.com