Are spilled insecticides harmful to life in water?
Find some mosquito larvae (wigglers). Place equal numbers of them in three separate jars of river of pond water. About ten in each jar is sufficient. Place a small minnow in the first jar. In the second jar, place about two drops of an insecticide you might have in your house and leave the third one uncovered. After two days, describe what happened in each jar. Place two drops of an insecticide in the jar containing the fish. Describe what happened. Why is this information important? 2. Does water temperature affect the time needed for mosquito emergence? Locate a pond or pool of water that contains a large number of mosquito larvae. With a dipper or cup, capture 25 live larvae and place them in a pan of water. Fill the rest of the pan to a depth of one or two inches with water from the same pond or pool. Place a tight-fitting screen over the pan and place it in a cool area, such as a basement or shaded corner of a garage. In another pan of water, place 25 mosquito larvae and set the p
