Add 1 part neem oil to 20 parts vegetable or corn oil and drop the solution onto the tip of each ear of corn. Yellow or curled leaves may be a sign your plant is suffering from aphids, a very ...

Insects that ingest plants treated with neem oil will die, but not immediately. Try the oil if you have an infestation of aphids, mealy bugs, caterpillars, or whiteflies, and be patient while the ...