Resistance is defined as a change in the sensitivity of a pest population to a pesticide, resulting in the failure of a correct application of the pesticide to control the pest.

What is meant by pesticide resistance?

Resistance is defined as a change in the sensitivity of a pest population to a pesticide, resulting in the failure of a correct application of the pesticide to control the pest.

What is pesticide resistance quizlet?

Define Pesticide Resistance. The inherited ability of a pest to avoid toxic effects when exposed to a particular pesticide.

What is pesticide resistance examples?

A classic example is the house fly. Populations of this insect that became resistant to DDT in the 1950s, also exhibited resistance, with no previous exposure, to pyrethroid insecticides used decades later. DDT and pyrethroids have the same MOA. This phenomenon is known as cross-resistance.

What is antibiotic or pesticide resistance?

Pesticide resistance could be described as a lower susceptibility of a pest population to a pesticide that was efficient against it before. Resistance to pesticide is based on a genetic mechanism.

What causes resistance to pesticides?

When a pesticide is first used, a small proportion of the pest population may survive exposure to the material due to their distinct genetic makeup. These individuals pass along the genes for resistance to the next generation.

How does pesticide resistance occur in insects?

Upon exposure to insecticides, insects that do not carry the resistance genes die, thus allowing the individuals with the resistance genes to survive and reproduce, creating more resistant insects. With every generation the number of resistant insects increase.

What is the main mechanism behind pesticide resistance?

Adaptation. Pests becomes resistant by evolving physiological changes that protect them from the chemical. One protection mechanism is to increase the number of copies of a gene, allowing the organism to produce more of a protective enzyme that breaks the pesticide into less toxic chemicals.

What happens when an insect becomes resistant to a pesticide quizlet?

1) There is variation in a population of insects. Genetic mutations make some insects naturally resistant to a pesticide. 3)The alleles which caused the pesticide resistance will be passed on the next generation, and so the population will evolve to become more resistant to the chemical.

Why is pesticide resistance a problem?

Over time many pesticides have gradually lost their effectiveness because pests have developed resistance – a significant decrease in sensitivity to a pesticide, which reduces the field performance of these pesticides.

What type of selection is pesticide resistance?

Pesticide resistance is an example of natural selection because the insects who survive the initial use due to a gene that enable them to resist the attack pass on the gene for pesticide resistance to their offspring. In each generation, the percentage of pesticide resistant insects increases.

How does pesticide resistance affect the environment?

The negative effect of pesticide resistance under non-toxic conditions increases when there are additional ecological stressors present. Studies have shown that predation, food shortages and parasites all increase the effect pesticide resistance has on survival rates.

What does insect resistance mean?

Insecticide resistance is a heritable change in the susceptibility of a pest population to a particular insecticide, or insecticide group. In practice, insects that repeatedly fail to be adequately controlled by the registered rate of an insecticide are said to be insecticide resistant.

How does pesticide resistance relate to natural selection?

Pesticide resistance is the result of natural selection caused by the pesticide. Pests vulnerable to the pesticide die quickly, and therefore more resistant individuals stay alive. Also, naturally occurring genetic modification may produce individuals with resistance to the pesticide.

How is pesticide resistance An example of biological evolution?

Pesticide resistance is an example of natural selection because the insects who survive the initial use due to a gene that enable them to resist the attack pass on the gene for pesticide resistance to their offspring.

Is pesticide resistance Good or bad?

Pesticides oftentimes are the most effective and efficient pest control tools available. Resistance to pesticides is a serious, and growing, problem.