DO NOT INCREASE PLANT SUSCEPTIBILITY TO PROBLEMS THROUGH NEGLECT OR IMPROPER CARE. Additional information is in Extension bulletin E-1936, "Selecting Ornamental Plants" and

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.

Hawthorn (Crataegus) Disease Problems Cedar-apple rust, leaf and twig rust control - chlorothalonil, triadimefon, thiophanate-methyl Fire blight no chemical control Leaf blight control - chlorothalonil Leaf spot, fungal control - copper, benomyl, chlorothalonil Powdery mildew control - benomyl, lime-sulfur, thiophanate-methyl, triadimefon Scab no chemical control

Insect Problems Aphids control - diazinon, acephate, insecticidal soap

Caterpillars control - diazinon, carbaryl, malathion, pyrethrum, Bacillus thuringiensis Fall webworms control - diazinon, carbaryl, Bacillus thuringiensis, pyrethrum Lace bugs control - diazinon, acephate, malathion, pyrethrum,

Scales control - adults: superior oil

crawlers: diazinon, carbaryl, pyrethrum, acephate, malathion, superior oil,

Spider mites control - malathion, superior oil, insecticidal soap Tent caterpillars control - diazinon, carbaryl, Bacillus thuringiensis, pyrethrum

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