C /fZ AGRICULTURAL RESEARCH CENTER
Hastings ARC Research Report PR1981-2 January 1981
CABBAGE INSECT CONTROL IN THE HASTINGS AREA
R. B. Workman, Assoc. Entomologist
FOLLOW ALL DIRECTIONS FOR USE AND SAFETY ON THE PEST L6 AT A TTM
Cabbage Insecticide Amount Cutoff HUM otWBRARY
insects (E-Emulsible) per acre* (days)
FEB 1 _1
Dibrom 8E 1 qt. 1 One a plication of a systemic ahicide
Dimethoate 2.67E 1-1 1/2 pts. 3 appll d hen the leaves begin cup
Cabbage Meta-Systox-R 2E 1 1/2 pts. 7 usual yrg4vs -s tif o6nrfodjid ol.
aphid Monitor 4E 1 pt. 35 Good lgi ed
Parathion 8E 1/2 pt. 10 and yellowed heads cannot be cleaned
Phosdrin 2E 1 pt. 1 up. Aphids are not attracted to head-
Systox 2E 1 1/2 pts. 21 ed cabbage--sprays are not needed.
Loopers, The emergency exemption obtained from
Diamond- Pydrin 2.4E 2.7 ozs. 7 EPA for Pydrin will be in effect until
back moth November 1, 1981.
Bacillus Cpds: Bactur, Dipel, Thuricide, Etc. Follow label directions.
Other Lannate,Nudrin 90S 1/2-1 lb. I Large worms are d fficult to control.
cater- Monitor 4E 1 pt. 35 Broccoli-14 days, cauliflower-28 days.
pillars, Dibrom 8E 1 qt. 1 Compounds for loopers will control
Cutworms Parathion 8E 1/2 pt. 10 most species. Cutworm control is besi
Phosdrin 2E 1 qt. 1 applied prior to transplanting.
M.cricket Diazinon 4E 1 pt. 7 Drench or spray. Do not increase
Cutworm Parathion 8E 1/2 pt. 1 dosage. Burning may result.
(seedbed) Baits A during late afternoon.
adjust dosage for different formulations 2 E, BEWP, etc.).
Ambush, Pounce: Emergency registration was denied by EPA for this season.
Pydrin: Pydrin is effective on many caterpillars, aphids, and other insects. Con-
trol is erratic at times, as with Ambush and Pounce, where insects occur in cool-
moist protected areas such as soils, leaf whorls, dense leaf cover, etc. Effective-
ness of control appears dependent on exposure of the insects, once poisoned, to sun-
light, dry soils, predators, etc. Pydrin control of caterpillars is equal to that
obtained with Ambush and Pounce and is one of the best materials tested in many
years. It has given excellent control of caterpillars on cabbage during April and
May when insect populations are highest. Pydrin Is the only experimental insecticide
available for control of loopers and diamondback larvae on cabbage. No other mate-
rials are under test. If new materials become available, It will, likely, take 5-10
years to meet data requirements on efficacy, residues, phytotoxicity, and human
health hazards for crop registration.
Insecticide application: Spray nozzle arrangements which give good coverage to the
undersides of the leaves are required for the best control because most moths, eggs,
and small larvae are found there. At least 1 nozzle overhead and 2 on drops at the
sides of the row and directed upwards should be used. As caterpillars become larger
they are very difficult to control.
After harvest: Disc cabbage under after the final cutting to prevent insect and
* disease buildup and movement to other fields and crops. Old cabbage fields, left
unattended, are a major cause of the pest problems in the area.