POTATO INVESTIGATIONS LABORATORY c
Mimeo Report 63-1* Octobe 1, 1962 ,
CABBAGE INSECT CONTROL IN THE HASTINGS AREA
R. B. Workman, Assistant Entomologist /
Tests of 13 insecticides at the Potato Investigations Lab last season showed that
the best treatments for cabbage loopers were parathion at 8 oz. and parathion at 4
oz. plus toxaphene at 16 oz. actual per acre. When loopers are numerous, especially
when the cabbage is heading, insecticides must be applied weekly for effective
control. During the colder part of the season, insecticide applications every 2
weeks or when insects are present will give adequate protection. Application is
very important. Thorough coverage is a must with particular attention to the under-
sides of the bottom leaves and to the inner leaves when cabbage is heading. Six
nozzles per row are recommended--2 overhead, 2 laterally, and 2 below the plants.
Double dosages are not necessary with good application. If dosages are increased,
the interval before harvest must he extended to eliminate residues. Enulbible
insecticides only are listed in the table. If other concentrations or formulations
are substituted, adjust the amount specified accordingly.
Follow the safety precautions on the insecticide label at all times. Do not leave
insecticides within reach of irresponsible persons.
INSECTICIDES RECOMMENDED FOR CONTROL OF CRUCIFEROUS INSECTS IN THE HASTINGS AREA
Insecticide Amount Actual Minimum days
Insect (E=Emulsible) per acre insecti- before Notes
Cabbage Parathion 4E --1 pt. 4-8 oz. 7-1 pt., 10-1 pt. Clean up infested
aphid Phosdrin 2E 1 pt. 4 oz. 1-cab., broc. plants early in season
3-cauliflower Check transplants.
_-- 1 Parathion control may
Parathion 4E +
1- pt. i
4 oz. +
7-pt_, 10-1 pt.
Found on undersides of
lower leaves. Primary
source of aphids on
Spray tops of rows for
cutworms and insects
crawling on surface.
Leaf- Parathion 4E 1-l pt. 4-8 oz. 7- p pt, 10-l pt Rarely occur in area
miner Diazinon 2E 1-2 pts. 4-8 oz. 7
Mole Aldrin 4E 11 quart 1 b. no time limit Soil treatment before
cricket Chlordane 8E 1 quart 2 Ibs no time limit planting.3
1When outer leaves are removed at harvest.
2U2DA tolerances for parathion are listed at 12.8 oz. with 7 days before harvest.
3After planting, sprays for loopers will control mole crickets.
Do not apply endrin or toxaphene to broccoli or cauliflower after edible parts
begin to form.
*Revision of Mimeo Report 61-1.