Title: Potato insect control in the Hastings area
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 Material Information
Title: Potato insect control in the Hastings area
Physical Description: Book
Creator: Workman, Ralph B.
Publisher: Agricultural Research Center,
Copyright Date: 1973
 Record Information
Bibliographic ID: UF00076358
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: 144727683 - OCLC

Full Text


AGRICULTURAL RESEARCH CENTER------
....... stings, Florida

Hastings ieesearh Report PR-1973-4


October 1973


POTATO INSECT CONTROL IN THE HASTINGS AREA
R. B. Worliman, Assoc. Entomologist


FOLLOW ALL DIRECTIONS FORi )S-, SAFETY ON


THE PESTICIDE LABEL~ATT .A TIMES.


Insect


Aphids


Armyworms,
Cutworms,
Tuberworm,
Other Worms


Insecticide
(E-Emulsible)
Azodrin 3.2E
Dimethoate 2.67E
Neta-Systox-R 2E
Monitor 4E
Systox 2E
Azodrin 3.2E
Lannate 90SP
Monitor L4E
Parathion 8E
Phosdrin 2E


Amount
per acre*
20 oz.
1 pts.
1 pts.
1 pt.
1 pts
20-40 oz.
-1 lb.
1-1i pts.
Pt.
1 pt.


Cutoff
(days)
-7
None
7
14
21
7
14
14
5
1


Notes


Aphids on potatoes are resistant
to DDT, Parathion, Phosdrin, anc
Thiodan.


Spray up to 1 week of digging
for cutworms and tuberworms.
Hilling deeper protects tubers
from insects.


Thiodan 2E 1-2 qts. None
Leaf-Footed Guthion 2E 1 at. 7 Guthion effective on tuberworms.
Plant Bug, Parathion 8E 4 pt. 5
Green Phosdrin 2E 1 pt. 1
Stinkbug Thiodan 2E 1-2 qts. None
Wireworm Diazinon 4E 1-2 qts. None Preplant soil treatment. See
Parathion 8E 1 qt. None "Hireworms" below.
Leafminer May be numerous at harvest but rarely cause damage.
* Adjust dosage for other formulations.

APHIDS: Aphid populations begin on the underside of the lower leaves,
usually, next to the soil surface. Use drop nozzles to get best coverage of
these leaves. Spray pressure of 200-300 psi will turn the leaves for complete
coverage. Some insecticides give only aphid control while others are also effec-
tive on worms and stinkbugs. Many aphids on potatoes come from cabbage. Disc
cabbage fields shortly after the last harvest to eliminate this source of aphids.
WIREWORMS: Wireworm damage is expected to be very low this season as it has
been for several years. Soil fumigation kills some wireworms, but those near the
soil surface usually escape.
TUBERWORMS: Tuberworms are still susceptible to most of the insecticides
used for worms and stinkbugs. Most damage occurs during dry seasons due to soil
cracking around the tubers. This allows egg laying on the exposed tubers. Regular
treatment during tuber formation will give good control. Tuberworm tunnels
usually have a "corky" lining.
STINKBUGS: Plant bugs are sometimes a minor problem on potatoes. Feeding is
usually confined to the upper stems and, most often, those with flowers. One
treatment will usually give control. Plant damage is probably very low.
CUTWORMS: Cutworms must be controlled by regular treatments before they get
to the tubers. Most damage is found on exposed tubers--those discolored or greene(
by sunlight. Deeper hilling and covering, if possible, after heavy rains will re-
duce most of the damage. Cutworm injury is worse near trees or weedy areas where
the adult moths hid- ri-ring the day. The moths fly and lay eggs mostly at night.


10-1-73
300 copies


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