SPRAY SCHEDULE FOR THE CONTROL OF PECAN DISEASES AND INSECTS
Reading edition
Name of spray and time of application Insect or disease to be controlled Spray materials, per 100 gallon Remarks
Prepollination spray, when first leaves are one-third grown Scab, downy spot, vein spot Zineb,[A] 2 pounds If phylloxera is a problem, see page 14.
First cover spray, when tips of small nuts have turned brown and nut casebearer eggs are observed Scab, downy spot, vein spot, leaf blotch, brown leaf spot Zineb, 2 pounds
Pecan nut casebearer, pecan leaf casebearer 3 pounds 50 percent wettable DDT, or 1 pound 25 percent wettable parathion, or 1 pint nicotine sulfate plus 2 quarts summer oil, or 5 pounds 40 percent wettable toxaphene, or 3 pounds 25 percent wettable malathion
Rosette Zinc sulfate, 2 pounds If rosette is a problem, include zinc sulfate in spray.
Second cover spray, 3 to 4 weeks after first cover spray Scab, downy spot, vein spot, leaf blotch, brown leaf spot Zineb, 2 pounds Zinc sulfate, 2 pounds
Rosette
Third cover spray, 3 to 4 weeks after second cover spray Scab, brown leaf spot, liver spot, aphids, mites Zineb, 2 pounds If aphid or mite infestations are severe, use insecticides recommended on page 13.
Walnut caterpillar, fall webworm If walnut caterpillars or fall webworms are a problem, use insecticides recommended on pages 15 and 16.
Rosette Zinc sulfate, 2 pounds
Fourth cover spray Pecan weevil 6 pounds 50 percent wettable DDT For control of weevils, apply spray when as many as three weevils can be jarred from a tree. If scab is present add 2 pounds zineb to DDT spray.
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