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.
Maple (Acer) Cultural Problems Rootstock incompatibility
Environmental Problems Girdling roots High temperature Nutrient deficiency (manganese)
Disease Problems Anthracnose control - benomyl, bordeaux mixture Cankers no chemical control Crown gall no chemical control Decline and dieback (Verticillium wilt) no chemical control Decline and dieback, soil problems no chemical control Leaf blister no chemical control Leaf spot, bacterial no chemical control Leaf spot, fungal control - copper, benomyl, bordeaux mixture Leaf tatter no chemical control Powdery mildew control - benomyl, lime-sulfur, triadimefon Tar spot no chemical control Verticillium wilt no chemical control Wood rot (decay) no chemical control
Insect Problems Aphids control - diazinon
Beetle borers control - Caterpillars control - diazinon, carbaryl, Bacillus thuringiensis, pyrethrum Erineum and rust mites control - sulfur, carbaryl Fall webworms control - diazinon, carbaryl, Bacillus thuringiensis, pyrethrum Gall midges control - carbaryl Gall mites control - sulfur, carbaryl Scales control - adults: crawlers: carbaryl, pyrethrum Scarab beetle adults control - carbaryl, pyrethrum Controls reported to cause plant injury - acephate, malathion, superior oil, insecticidal soap
