POTATO INVESTIGATIONS LABORATORY
Mimeo Report POL 67-3*
CABBAGE, CORN, AND POTATO INSECT CONTROL IN THE HASTINGS AREA
R. B. Workman, Ass't. Entomologist
Follow the safety precautions on the insecticide label at all times. Make sure
correct dosages are used. Fertilizers added to pesticide mixtures in the spray
tank may cause chemical breakdown and loss of control.
FOR CONTROL OF CABBAGE INSECTS
Dibrom 8E 1 pt. 4 Fast, short activity._
Cabbage Cygon 2.6E 1 p 21 Fast, long activity.
aphid Parathion E pt. 7-10; t. Regular applications peed.
Fhosdrin 2E 1 pt. 1 Fast short activity.
Systox 2E pts. 21 Fast, long activity.
DDT 2E plus 2 qts. + 21 Fewer wrapper leaves will
Cabbage Toxaphene 8E 1 qt. give lower residues.
looper, Dibromn E 1 qt. 4 Effective on loopers.
Worms, Parathion E 1 pt. 10 Excellent in 1966 looper tests.
Cutworms Parathion 4E+ 1 pt. + 14 Fewer wrapper leaves will
Toxaphene 8E 1 qt. give lower residues.
Phosdrin 2E 1*2 pts. 1 Higher dosage for loopers.
Mn3e Diazinon 400 1 pt. -- Spray or drench. Treat area
c:i c:-et Parathion 4E 1 -- around seed bed for best con-
(s'e trol. Do not increase dosage.
be' ) Baits Results are often erratic.
INSECTICIDES RECOMMENDED FOR CONTROL OF IRISH POTATO INSECTS
Insect Insecticide Amount Days prior
(E-E nulsible) per acre to harvest Notes
Aphids Cygon 2.67E 1-li pts. 7 Use 1l pts. of Cygon for
Meta-Systox-R 2E 1t pts. 7 heavy infestations.
Systox 2E lt pts. 21
Thiodan 2E 1 qt. --
Cutworms, Parathion 4E l-1 pt. 5 Use 1 pt. of Parathion for
Plantbugs, Thiodan 2E 1 qt. -- loopers. Spray up to 1 week of
Tuberworm, Toxaphene 8E 1-2 pts, -- digging for cutworms and tuber-
Worms worms .
Wireworm Diazinon AG500 1-2 qts. -- Preplant soil application.
_Parathion 4E 2 qts. --
Leafminer May be numerous at harvest but rarely cause damage.
INSECTICI ES RECOMENDED FOR CONTROL OF FIELD CORN INSECTS
Insect Insecticide Amount Days before
____ (E=Emulsible) per acre harvest Notes
Budworm, DDT 2E 2-4 qts. -High.dosages for earworms. Do
Earworm Parathion 4E -I pt, 12 not feed forage or ensilage
Sevin 80W 2 Ibs. -treated with DDT or Toxaphene
Toxaphene 8E 1-2 pts. to dairy animals or animals
__ _being fiihied for slaughter
Stinkbug Use lower rates of above insecticides. DDT is not effective. Stinkbugs
kill the developing kernels by feeding through the husk.
The earlier corn can be grown, the less subject it is to insect damage.
MOLE CRICKETS: These insects are most active at night--tunneling, moving about
on the soil surface, and flying. Baits require ideal conditions for best results
and are effective for only a short time. Better control is usually obtained with
sprays or drenches. Insecticides applied as drenches penetrate the soil where
they contact the tunneling mole cricket and where they are not rapidly broken
down by light and air. Surface sprays give good insecticide coverage to plants
and soil surface but probably decompose more rapidly than drenches. The land
around the seed bed must be treated with insecticides to prevent insect movement
into the area. Parathion at 2 pints will cause the first leaves of cabbage to curl.
WIREWORMS: Little wireworm injury has occurred in the Hastings area since about
1961. Tunnel injury since that time has been caused mostly by the potato tuber-
worm. Injury last season was scattered and low. Tuberworms can be controlled by
sprays beginning about blossom time and continuing through harvest. Aphids, cut-
worms, and plant bugs are most damaging during this period also. Tuberworms are
probably present at Hastings throughout the year. They can develop on potato,
tomato, tobacco, and weeds of this family of which over 35 different species are
present in Florida. Stored potatoes and cull piles are often breeding places.
INSECTICIDE RESIDUES ON CABBAGE: Cabbage is shipped from the Hastings area with
4-6 or more wrapper leaves. Most of the insecticide residues and insect damage are
on these leaves. If cabbage were shipped with fewer or no wrapper leaves, much of
the insect and residue problem would be elim.iratd and less trimming at the other
end would be necessary. O(hVr methods of ship-Cient should be considered, especially
as they might fit in with mechanical harvesting.
ONIONS: Early spring onions are produced only in Texas. These mild-type onions
do not store well and are a3-rkcted immediately after harvesting. The main
competition for thi- crop aero fill1 grown orions in storage. Mechanical harvesters
have been developed for thi s crop. Yields in thoe earl-' spring area of Texas
during the 1950's ra:.egel. foi. 42 to 100 cut. per- are with a 10-year average of
71 cwt. Yields in expri.entnal tests in Florid- have exceeded 300 cwt. per acre
due mainly to increaseA moisture. Average seasonal prices received by farmers in
Texas during the 10-year period ranged from $2.30 to $7.20 per cwt.
* Revision of Mimeo Report POL 66-3