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Could be exposure (percentage-wise) mode of action plays a part as well as possible resistance; if any. For example, some are stomach poisons ingested by bugs that groom & will not absorb through their bodies. Since a spider has no antennae to keep clean, these won't do much for them.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoPests develop a resistance to pesticides because most pesticides are manufactured and sold under the premise that they will suppress, not eradicate, the pest involved. By suppression, we mean that most, not all, of the pests are destroyed. Each time the pesticide is used, a small number of pests survive. These individuals have some kind of genetic adaptation or mutation which allows them to survive the dose of pesticide. Once those few have survived, they will reproduce another generation of resistant pests, those will survive the pesticide, reproduce, and the number continues to build until the entire population is resistant.
This is why the principles of Integrated Pest Management (IPM) are so important. When controlling any pest, it is essential to use different compounds with different modes of action on each subsequent application in order to help delay resistance buildup in the pest.
There is evidence that the wide use of Roundup brand of glyphosate in the US has caused some weed species to develop glyphosate resistance. The glyphosate-resistant gene in many crops has made it convenient for farmers to use just that one compound and get good weed control for many years, until some weeds such as marestail have begun developing resistance. If they had been alternating with other broad-spectrum weed control such as Liberty brand of glufosinate, these weeds might not have developed resistance.
Wiki User
∙ 13y agoEach succeeding surviving generation adapts to anything that is a regular part of their environment. That's why exterminators alternate for clients with pest pressure.
Wiki User
∙ 13y agobecause every-time you put insecticides on some places insects smell and if it survives it gets used to it
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Tips On Removing Pests ?
Many different varieties of pests can make their way into your home. Anything from mice or rats to spiders and wasps. These pests can cause damage to your food supply and possibly your health or your home. You can exterminate pests around your home using some basic supplies and insect pesticide. Start by figuring out where pests are entering your home and block off the areas. Set traps if necessary and apply insect pesticide to the area. Finish the area by cleaning up any food scraps or other items that could encourage pests to settle. Maintain the cleanliness and apply insect pesticide in regular intervals to keep pests at bay.
Who invented pesticides?
Since a pesticide can control even spoilage of food, the inventor of the pesticide would have to be that first human who discovered that application of salt made some foods such as fish and or meats last much longer.
What are the advantages and disadvantages of integrated pest management?
Some of the benefits of Integrated Pest Management is that the decrease of the use of chemical application reduces the risk of bad side effects to staff, results in the saving of money and decreases the risk of property damage from the chemicals used.
What helps a hover fly survive?
A hover fly survives off of pollen and nectar. Some of the larva of the hover fly eats the pests which destroy crops.
What are some of the dangers to crops?
Drought, insects, famine, to much pesticide, to little pesticide are possible problems.
How is pesticide resistance an example of evolution?
Disinfectants are a type of antibiotic. Brand X kills 99.9% of all bacteria when used as directed. .1% of the bacteria survive. Let us say that the treated area is 1 square foot and the original population one type of bacteria was 1 million. This means that 10,000 of these bacteria survived due to any various differences between them and the dead. The 10,000 divide every 24 hours so, in a very short time, the 1 square foot area is repopulated with bacteria that has the genetic potential to survive the next round of disinfectants. Not all of these offspring will. Over time our handy dandy disinfectant only kills 80% and the amount of bacteria is still enough to cause illness. Extrapolate this scenario to the interior of the human body and the use of medications. Add the fact that many people DO NOT use them as directed any more than most people use a surface disinfectant as directed and we have a neat little breeding ground where natural selection occurs at an alarming rate.
What original event resulted in evolution of insecticide resistance in some insects?
The application of dichlorodiphenyltrichloroethane (DDT) is considered the original event that resulted in the evolution of pesticide resistance in some insects. The incident numbers among the pivotal events in the twentieth century since its first applications date to the 1940s. Immunity to the pesticide's toxic effects may be traced back to as early as 1947.
Is Aphids are pests an opinion?
Yes it Is an opinion. Some people might think aphids are pests
What Are Some Uses For Nicotine?
Nicotine is used as a pesticide.
How pesticides resistance evolve?
Pesticide resistance evolves through natural selection. When a pesticide is applied, some individuals within the target pest population may have genetic variations that make them less susceptible to the pesticide's effects. These individuals survive, reproduce, and pass on their resistant traits to their offspring, leading to an increase in resistance over time. Continuous use of the same pesticide can further select for resistance, making it more difficult to control the pest population.
How do you make your own pesticide at home?
Some things really are best left to the professionals. This is one of them. Anyone who can't figure out how to make a pesticide on their own is more likely to kill themselves trying than to make a safe and effective pesticide. That said: one reason tobacco plants contain nicotine is that it's toxic to certain kinds of pests; you could try soaking cigarettes or chewing tobacco in water and lightly spraying it on your plants. I personally wouldn't do it on any plants I intended to eat, but it should be fine on ornamentals (assuming you don't have pets or small children).
Examples Of Pests?
Some common examples of pests are rodents, snails, slugs, locusts, cabbage butterfly and many more.
