Yes, roots can be the sources of insecticides. For example, they're the sources of a well known botanical control called Rotenone. Specifically, compounds in the roots of the Derris elliptica Benth. may be used as insecticides, pesticides and piscicides. The compounds may be called Derris extract or Rotenone. The latter is the name by which the derivative insecticide is known among organic gardeners in the United States of America.
Rotenone is mildly toxic to mammals, including humans. One reason for the lower toxicity levels lies in the difficulty for rotenone to be taken in by the gastrointestinal tract or through the skin. Because of its irritability, rotenone tends to be vomited back up before it can cause harm to mammals.
But despite its mild toxicity, Rotenone still has the potential to cause fatal reactions. This is particularly a concern in regard to children, senior citizens, and those with such health problems as compromised gastrointestinal tracts. So the U.S. Department of Agriculture's National Organic Program no longer approves the use of rotenone in certified organic production.
The mildness of the reaction doesn't carry over to other life forms. Specifically, rotenone is highly toxic to insects, fish and aquatic life. The reason lies in the ease with which it's taken in by the gills or the trachea.
The plant is native to southeast Asia. Other synonymous scientific names include Parraderris elliptica and Pongamia elliptica. Common names include Derris, oil tree, poison vine, tubaroot, and tubli.
The Green Hill Landscaping website does not mention whether non-organic or organic insecticides are used. Botanical insecticides may not be the best choice when active ingredients such as rotenone are used. For example, the active ingredient in question tracks back to the roots of Fabaceae family members and to the seeds and stems of the jicama vine plant, sources of toxicity in insects and such aquatic life as fish.
Pesticides and insecticides can eliminate pesky insects that eat grass. There are two types of insecticides: topical and systemic. Topical insecticides are sprayed or sprinkled on the grass and kill insects on contact. Systemic insecticides are chemicals that are ingested by an insect from the roots of the plant. They only kill the insect after it has eaten it. http://www.lakejemfarms.com/blog/posts/herbicides-and-pesticides-what-to-use.html
To the sources; to the roots.
Carbohydrates
Roots and insects in the water are common sources of coliform.
old paint, leaded gasoline, old pipes mercury: contaminated fish, industrial and agricultural wastes cadmium: industrial waste, insecticides, old galvanized pipes arsenic: insecticides and industrial processes
Insecticides are products of the chemical industry.
yes , i think insecticides are irritant substances
"Insecticides" is a plural noun.
Thomas Cobb Watkins has written: 'Properties and commercial sources of insecticide dust diluents and carriers' -- subject(s): Insecticides
Yes. It is the plural of insecticide, as in, "There are various insecticides from which to choose."
to remove poisonous substances from insecticides