11.7 the degree of damage due to pests Guidelines on the prevention, control and management to get rid of the pest have levels of pest damage, due to the level of detail and the 3 Figure 11.3. General equilibrium level 1) (general equilibrium position), the density of the pest in a period where there are no changes to the environment. The average density of a pest is located below the level of the epidemic, but if the environment is changed, the level of general equilibrium, it will change. Level 2) economy (economic threshold), the density of the pest began to take effect, causing damage to plant and will need to do to prevent removal to pest density increases up to and including the level of economic damage. In order to eliminate the use of protection methods are often considered to reduce the density of the pest, is a general balance. There is no need to decrease the density of the pest ran out. Level 3) economic losses (economic injury level) refers to the density of the pest level, economic damage, and if the level of pest density is higher than this, then it is usually too late for prevention, removal, because it may require high investments or may not help the damage to the output.
การแปล กรุณารอสักครู่..