For a certain insecticide, the LD-50 dosage level for rats is determined to be 250 milligrams per kilogram of body mass. On the basis of this information, which of the following is the best prediction regarding the consequences of receiving this dosage of the insecticide?
Five hundred out of every one thousand rats would die

500 out of every 1000 rats would die

Explanation:

Given LD (Lethal dose) = 50

This is the amount required to kill 50% of a test population

To get the whole test population,

Therefore 50/100= 250

That is 50 to 100

250 to x

Cross multiply

(250 × 100)/50

=500 (that is 50% of the population)

The whole population will be 500 × 2=1000

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correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.