How does pesticide resistance occur?
Repeated use of the same class of pesticides to control a pest can cause undesirable changes in the gene pool of a pest leading to another form of artificial selection, pesticide resistance. Worldwide, more than 500 species of insects, mites, and spiders have developed some level of pesticide resistance.
What is pesticide resistance quizlet?
pesticide resistance. inherited ability of a pest to survive and reproduce following exposure, lethal for the wild type.
What does pesticide resistance mean?
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. Resistance can develop when the same pesticide or similar ones with the same mode of action are used over and over again.
How does pesticide resistance relate to the pesticide treadmill?
Also referred to as the “pesticide trap,” farmers get caught on the treadmill as they are forced to use more and more — and increasingly toxic — chemicals to control insects and weeds that develop resistance to pesticides. Overall, pesticide resistance is increasing.
How do you manage pesticide resistance?
Key elements of resistance management include minimizing pesticide use, avoiding tank mixes, avoiding persistent chemicals, and using long-term rotations of pesticide from different chemical classes. Minimize Pesticide Use. Minimizing pesticide use is fundamental to pesticide resistance management.
Which is the first chlorinated organic insecticide?
First chlorinated insecticide is DDT.
Which of the following is chlorinated organic insecticide?
The chlorinated hydrocarbons were developed beginning in the 1940s after the discovery (1939) of the insecticidal properties of DDT. Other examples of this series are BHC, lindane, Chlorobenzilate, methoxychlor, and the cyclodienes (which include aldrin, dieldrin, chlordane, heptachlor, and endrin).
What is the name of first produced organochlorine pesticides?
Organochlorine pesticides are chlorinated hydrocarbons used extensively from the 1940s through the 1960s in agriculture and mosquito control. Representative compounds in this group include DDT, methoxychlor, dieldrin, chlordane, toxaphene, mirex, kepone, lindane, and benzene hexachloride.
Is acetone a chlorinated solvent?
It is a colourless, highly volatile and flammable liquid with a characteristic pungent odour. Acetone is miscible with water and serves as an important organic solvent in its own right, in industry, home, and laboratory….Acetone.
| Names | |
|---|---|
| ChemSpider | 175 |
| ECHA InfoCard | /td> |
| EC Number | 200-662-2 |
| Gmelin Reference | 1466 |
Why are chlorinated solvents bad?
Chlorinated solvents are classified as probable or possible carcinogens. It is unknown whether exposure to these agents increases the risk of malignant or benign brain tumors.
What are the health effects of chlorinated solvents?
Short-term side effects may include dizziness, fatigue, headaches, and/or skin rashes. Long-term side effects may include chronic skin problems, and/or damage to the nervous system, kidneys, or liver. Some chlorinated solvents are also known to cause cancer, in both humans and animals.
Why is acetone a good solvent?
Acetone is an excellent solvent because it can dissolve other substances. Given that it is miscible and polar, it can work with products ranging from water to different organic compounds. Because of this polarity, acetone can mingle with polar solvents like water.
Is acetone a better solvent than water?
Acetone is a good solvent due to its ability to dissolve both polar and nonpolar substances, while other solvents can only dissolve one or the other. Secondly, acetone is a good solvent because it is miscible substance, meaning it has the ability to mix with water in all proportions.
Is acetone acidic or basic?
Is acetone acidic or basic? Acetone is NEITHER ACIDIC NOR BASIC.
Does acetone dissolve plastic?
There are all kinds of plastics. If a particular plastic bears a close enough similarity to acetone, the acetone will dissolve or at least affect its surface, softening, smearing or even dissolving the plastic. Other plastics, dissimilar to acetone, will remain unaffected by the solvent.
What plastic does acetone not dissolve?
Many kinds of plastic do not dissolve in acetone. Polypropylene and nylon are unaffected, PTFE unsurprisingly handles it just fine as well. Two kinds of plastic that do dissolve in acetone are PVC and polystyrene.
What liquid can dissolve plastic?
acetone
What solvent can dissolve plastic?
Can anything dissolve plastic?
Oxygenated solvents including simple acetone, will dissolve many thermoplastics but not all of them. Sulfur-containing solvents such as DMSO, are also quite good for many plastics. The key is a polar molecule that contains one or more electronegative elements, especially chlorine and oxygen.
What type of plastic does acetone dissolve?
Does vinegar break down plastic?
Vinegar contains between 4-12% Acetic acid. This can degrade the plastic over time (but that’s years). Buying it in plastic will taste the same as glass assuming you’ll be using it all in a year or 2.
Where do you put vinegar in a washing machine?
To clean your clothes with vinegar, put 1/2 cup distilled white vinegar in your washing machine’s detergent compartment. You don’t need to add any other detergents.
Will baking soda whiten plastic?
Baking Soda Scrub Baking soda may remove some types of yellowing such as those caused by dyes and minerals in some foods. Make a paste of baking soda and water, and then wet the yellowed plastic. It may take several tries to lighten the plastic completely.
How do you Decalcify plastic?
Luckily, the calcium deposits are both easy and inexpensive to remove.
- Fill the sink with enough hot water to submerge the plastic surface.
- Pour 1/2 cup vinegar into the sink per 1 gallon of hot water.
- Let the plastic soak for 30 minutes.
- Wipe the plastic with a dish cloth, and rinse with hot water.
How do you clean dirty plastic?
Use a nonabrasive, all-purpose cleaner. Rinse with clean water and dry with a clean, soft cloth. Avoid using abrasive cleanser that may scratch the plastic. Use a tub/tile/sink cleaner; nonabrasive, all-purpose cleaner; or a paste of baking soda and water.
What is a good plastic cleaner?
11 Ways To Remove Stains From Plastic
- Rubbing Alcohol. Rubbing alcohol can be used to clean coffee, tea, tomato sauce and tomato paste, juice and soda stains, and discoloration caused by most types of food dyes.
- Hand Sanitizer.
- Bleach.
- White Vinegar.
- Baking Soda Paste.
- Denture Tablets.
- Alka Seltzer.
- Lemon.
How do you get fingerprints off of plastic?
Plastic Surfaces and Glass Surfaces that are not porous can generally be cleaned by using window cleaner, nail polish remover, vinegar or any other cleaner that is designed to break down oil. You can also use mild detergent and water with a damp cloth or newspaper to get rid of prints and smudges as well.