SPRAY SCHEDULE FOR THE CONTROL OF PECAN DISEASES AND INSECTS
| 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. |
[A]Zineb. Zinc ethylene bis dithiocarbamate. Manufactured by Rohm & Haas Co., trade name Dithane Z-78: E. I. DuPont Co., trade name Parzate.