In a certain field, insecticides were sprayed to kill pests, but then there was sudden decrease of yield of food crop, this may be due to
In a certain field, insecticides were sprayed to kill pests, but then there was sudden decrease of yield of food crop, this may be due to
The correct option is D Pesticides killed those insects and also which helped in pollination.
Pesticides have had some of their most striking effects on birds, particularly those in the higher trophic levels of food chains, such as bald eagles, hawks and owls. These birds are often rare, endangered and susceptible to pesticide residues, such as those occurring from the bioconcentration of organochlorine insecticides through terrestrial food chains. Pesticides may kill grain and plant-feeding birds and the elimination of many rare species of ducks and geese has been reported. Populations of insect-eating birds, such as partridges, grouse and pheasants have decreased due to the loss of their insect food in agricultural fields through the use of insecticides. Thus, the correct answer is option D.
Pesticides have had some of their most striking effects on birds, particularly those in the higher trophic levels of food chains, such as bald eagles, hawks and owls. These birds are often rare, endangered and susceptible to pesticide residues, such as those occurring from the bioconcentration of organochlorine insecticides through terrestrial food chains. Pesticides may kill grain and plant-feeding birds and the elimination of many rare species of ducks and geese has been reported. Populations of insect-eating birds, such as partridges, grouse and pheasants have decreased due to the loss of their insect food in agricultural fields through the use of insecticides. Thus, the correct answer is option D.
