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Which of the following statement is true about

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16. Which of the following statement is true about economic injury and thresholdLevel?1 point*A. a crop EIL, helps a grower determine the point at which pest population causes enoughdamage to justify the time and expense of active control measuresB. this threshold is exceeded when the financial loss caused by the pest surpasses the cost ofpest controlC. when action must not be taken to avoid additional crop damageD. both a and b
17. An unwanted organism which competes with man for food and shelter or threatenstheir health, comfort and welfare.*1 point
D. Pathogens18. A toxic substance which is readily available and kills pest instantly is termed__.*
19. A control strategy where synthetic toxic substance or bioactive plant products areused to combat pest population.*1 point
20. This refers to the control of pests by living organism s under either natural orartificial -environment*1 pointA. Cultural controlB. Physical controlC. Chemical controlD. Biological control
21.From agricultural point of view, insects are beneficial because of the following,except when;*1 point
22. Water management can be categorized under all methods of control except;*1 point
23. The insecticide that kills a wide array of insect pest species is ___.*

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Term
Spring
Professor
Brian wade
Tags
Silent Spring, Pesticide, Biological pest control, a Economical Pest Mangement

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