JUN 177 AC CULTURAL RESEARCH CElTER
Has5ti se .a 1e0lo 75-2
POTATO INSECT' CUUNTROL IN TJHE HAbSTJ'l'y11 uo
R. B. Workman Assoc. Entomologist
-FOLLOW ALL D-IRECTIONS FOR USE AND SAFETY ON THE PESTICIDE LABEL AT ALL TIMES
.Inse6t Insectifide Amount Cutoff Notes
(QEmnmsijble). per .are* (days) .
Azodin- ag E 20 oz .7 Aphids on nptatoe's are resis-
Aphfds Dimethoat7e 2.67E lAots. Non'- tant to DDT, Parathion, Phos-
MeiaSystR 2E lpt's.. ".7 din,'and Thiodan.
Monifok 4E I pt. 7 ii 1
Systox 2E 1%nts .:21
Armvyworms, Azodrin 3.2E 20-40 oz. 7 Sprnv ur to 1 wee- of digging
Cutworms, LannateNudrin90S 1/2-1 lb. 14 for cutTrorlns anO tub erwy-orrs.
Tuberworm, IMonitor 4E 1-1 1/2 pts 14 Hilling deeper -rotects tubers
Other Worms Parathion 8E 1/2 ot. 5 fror insects.
Phosdrin 2E 1 pt. 1
Thiodan 2E 1-2 qts. iNone
Leaf-footed Guthion 2E 1 qt. 7 CGuthion effective on tuber-
Plant Bug, Parathion 8Y 1/2 pt. 5 worms.
Green Phosdrin 2-' 1 t. 1
Stinkbur Thiodan 21E 1-2 tq. Tone
:ireworm Diezinon ,- 1-2 qts3. one
Parathion 2 1 qt. s___ one
Loaf"m.iner ?ar be numnero'rs at harvest but rarely
'Preplant soil treatment.
'"cAdjust dosage for other fo.i:.ulations,
APHTIDS: Aphid populations stBrt on the underside of the lower leaves next to the
so.l surface. Use drop nozzles for best coverage of these leaves. Spray pres-
sure of 200-300 psi will turn the leaves for better coverage. It is almost im-
possible to reduce aphid numbers below 1-2 per leaf. Healthy plants can with-
stand some aphids. Aphid populations at Hastings (and in Florida) have been er-
ratic for several years--high one season, low the next. Parasites and predators
and environraiental conditions nay be responsible. The chief insects attacking po-
tato aphids are a tiny wasp which develops inside the aphid causing it to become
swollen and straw-colored and lady bird beetles and their 6-legged, uorm-like,
larvae. Cabbage is a source of the green peach aphids which attack potatoes.
Chop and disc cabbage fields shortly after the last harvest to linit further
movement to potato fields.
'IR",OPF'S: Little wireworn da~ar-e to potatoes was evident on inspection at
several graders last season. Little damage is expected this season. However,
growers can be on the lookout for the wirewormr as conditions may become, once
aFain, favorable for its increase. The southern potato wireworm, occurring at
TTastings, is found in the coastal states from forth Carolina to Louisiana. The
wireworm causing damage to sugar cane and potatoes in South Florida is a larger
species not often found here.
TUBERUORBS: Tuberworms are present at castings in low numbers each year. namrage
occurs during hot-dry seasons. Tuberwnorys also attack eggplant, tomato, tobacco,
and several related weeds common at Hastings. Sore summer varryoyer is on pot&-;
toes saved for home consumption.
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