Do Not Increase Plant Susceptibility To Problems Through
DO NOT INCREASE PLANT SUSCEPTIBILITY TO PROBLEMS THROUGH NEGLECT OR IMPROPER CARE. Additional information is in Extension bulletin E-1936, "Selecting Ornamental Plants" and
List of files and visuals associated with this text.
Extension bulletin E-1947, "Planting and Care of Ornamental Landscape Plants."
All plants can be affected by environmental and cultural problems. Only those occurring most frequently are listed here. Use pesticides only after an accurate diagnosis and control recommendation have been made. Use pesticides strictly in accordance with label directions. Always wear protective clothing and do not spray on windy days.
This list is for educational purposes only. Inclusion does not imply endorsement and omission does not imply discrimination. Not all of these pesticides are labeled or recommended in all states.
Crabapple (Malus) Cultural Problems Rootstock suckering
Disease Problems Canker no chemical control Cedar-apple rust, leaf rust control - chlorothalonil, thiophanate-methyl, triadimefon Crown gall no chemical control Fire blight no chemical control Leaf spot, fungal control - benomyl, chlorothalonil Powdery mildew control - benomyl, lime-sulfur Scab control - chlorothalonil, benomyl, thiophanate-methyl Scorch no chemical control
Insect Problems Aphids control - diazinon, insecticidal soap
Bagworms control - carbaryl, malathion, Bacillus thuringiensis
Beetle borers control - Caterpillars control - diazinon, carbaryl, malathion, pyrethrum, Bacillus thuringiensis Clear-wing borers control - Eastern tent caterpillars control - diazinon, carbaryl, malathion, pyrethrum Bacillus thuringiensis Erineum and rust mites control - sulfur, carbaryl Fall webworms control - diazinon, carbaryl, Bacillus thuringiensis, pyrethrum Pear slug sawflies control - diazinon, carbaryl, rotenone, malathion, pyrethrum Scales control - adults: superior oil
crawlers: diazinon, carbaryl, pyrethrum, malathion, superior oil, Scarab beetle adults control - diazinon, carbaryl, malathion, pyrethrum Slugs and snails control - mesurol Spider mites control - malathion, superior oil, insecticidal soap
Control reported to cause plant injury - acephate
