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Many commercial pesticides become less effective after 2-3 years because?
Because Pests with resistant genes survive and reproduce.
What pesticides are used to kill insect pests?
Pesticides are used to prevent, kill and repel pests. The pesticides used to kill insects are attractants, fumigants, insecticides, pheromones and repellents.
What is bio pesticides?
Bio Pesticides EPA definition: Biopesticides include naturally occurring substances that control pests (biochemical pesticides), microorganisms that control pests (microbial pesticides), and pesticidal substances produced by plants containing added genetic material (plant-incorporated protectants) or PIPs. Basically a Bio Pesticide is anything designed to kill pests that is made out of microorganisms or derived from microoganisms.
What is the difference between biological control and pesticides?
Pesticides.Pests that affect human health and crops are a major problem.However, one possible consequence of using pesticides is that beneficialorganisms living in the same environment as the pests could also beharmed. This can happen because many pesticides kill more than justthe pest. For example, the lygus bug are pest that feedson alfalfa and canola plants and causes severe damage to these crops.However, pesticides that are sprayed to kill lygus bugs also kill bees.Another downside to using pesticides is that they can also harm thebeneficial insects that normally prey on the pests. This can result inthe populations of pests actually increasing because there are fewerorganisms to prey on them!Biological control.Another way to control insect pests is to use their natural enemies.This method, called biological control, can be very effective and limitsor eliminates the need for pesticides. For example, leafy spurge is aweed that was accidentally introduced into Canada in the late 1800s . Leafy spurge grows faster than naturally occurringpasture grasses. Cattle will not eat leafy spurge, so land that is infestedwith this weed cannot carry livestock. The black dot spurge beetle is asmall beetle that feeds on leafy spurge. The beetle was introduced into Alberta in 1983, and has been very successful incontrolling the spread of leafy spurge. Desirable plants, such as pastureand rangeland grasses, are returning to the areas where leafy spurgeused to grow. Although biological control can work very well, there can be risks.Whenever a new organism that is not native to the area is introducedto an ecosystem, there is always a risk that it will cause harm.
What are some of the potenial benefits and potential risks of biotechnology?
In biotechnology, biological processes are used to manufacture products intended to improve the quality of life for humans. Some of the potential benefits of biotechnology are that there are lower production costs for the farmer, increased food production, and with the need for pesticides and fertilizers being reduced, biotechnology would be good for the environment. The potential risks of biotechnology include food safety risks, pests developing resistance to pest-resistant crops and/or changes in the nutritional composition in foods.
What is the most likely side effect of the overusage of pesticides?
Pesticide-resistant pests will survive, reproduce and flourish.
Is the most likely side effect of the overusage of pesticides?
Pesticide-resistant pests will survive, reproduce and flourish.
Why would GM crops need less pesticides?
GM crops having disease resistant genes hence they are resistant to disease and pests so they not need more use of pesticide.
Many commercial pesticides become less effective after 2-3 years because?
Because Pests with resistant genes survive and reproduce.
Are pesticides harmful?
They are to pests.
Is it possible to find pests resistant to pesticides in an environment where pesticides were never used?
Yes, it is possible to find pests resistant to pesticides in an environment where pesticides never were used. For example, members of a species may individualize their genetic codes to the extent that some are less tolerant -- and others less intolerant -- of environmental stress. Those members which display greater tolerance of such challenges as droughts, floods, pathogens, pesticides, and predators will tend to survive even first-time encounters with something unfriendly to their well-being than those with greater intolerance.
What is the meaning of quick action pesticide?
Pesticides are chemicals which kill pests, generally insect pests. "Quick action" pesticides kill bugs quickly.
How can i combine these sentences - pesticides kill more than pests pesticides are dangerous chemicals?
Like this: Pesticides are dangerous chemicals, they kill more than pests. However, your English teacher may appreciate one of these two revisions: A category of dangerous chemicals known as pesticides can kill more than pests. This next revision incorporates the addition of an appositive Pesticides, a variety of dangerous chemicals, kill more than pests.
How are pests manage on organic farms?
by organic pesticides.
What is the purpose of peticides?
The purpose of pesticides is to kill pests.
These are sprayed on crops to protect them against pests?
Pesticides.
How are pesticides harmful to animals people?
they kill pests
