
Table 14.2. Herbicides approved for managing weeds in potato. (continued)
Labels change frequently. Be sure to read a current product label before applying any chemical.
Active ingredient Trade name MOA
lb. a.i./A product/A code Weeds controlled / remarks
Clethodim (Arrow, Select) 2 EC 1
Nonionic surfactant with Select Max. PHI 30 days.
0.09 - 0.25
(Select Max) 1 EC
0.07 - 0.25
Imazosulfuron (League) 75 WG 2 Broadleaf and grass weeds. Limit of 2 applications per year and no more than 6.4 oz./A per year. PHI 45
days.
0.19-0.3 4-6.4 oz.
EPTC (Eptam) 20 G 8 Annual broadleaf, grass weeds, and nutsedge. Apply at layby to a clean cultivated soil. Incorporate
mechanically or with irrigation. Apply Eptam 7 E after true leaves have formed and apply as a layby
treatment. Do not exceed 12.25 lb. a.i. perseason. PHI 45 days.
3 15 lb.
(Eptam) 7 E
3.1 - 7.9 3.5 to 9 pt.
Metribuzin (Tricor) 75 DF 5
0.23 - 0.5 0.3 - 0.6 lb. on the label. Do not exceeded 1.3 lb. of product /A. PHI 60 days.
Pelargonic acid (Scythe) 4.2 EC 27 Emerged broadleaf and grass weeds. Direct spray to row middles. Product is a contact, nonselective, foliar
3 - 10% v/v applied herbicide with no residual control. May be tank mixed with several soil residual compounds.
Rimsulfuron (Matrix) 25 DF 2 Apply immediately after drag-off. Rainfall or sprinkler irrigation 0.3-1.0 in. required within 5 days after
per year.
0.016 - 0.023 1.0 - 1.5 oz.
Sethoxydim (Poast) 1.5 EC 1 Control growing grass weeds. A total of 5.0 pt./A applied in one season. Include a crop oil concentrate.
0.28 - 0.47 1.5 - 2.5 pt. Unsatisfactory results may occur if applied to grass under stress. PHI 30 days.
Table 14.3. Insecticides labeled for management of arthropod pests of potato. (continued)
Labels change frequently. Be sure to read a current product label before applying any chemical.
MOA
Insects
Code1
Trade Name
Active Ingredient
Rate
Product/acre
REI
(hours)
Days to
Harvest Notes2
Aphids 1A *Lannate LV; *SP
(methomyl)
LV: 1.5-3.0 pt
SP: 0.5-1.0 lb
48 6 Do not make more than 10 applications per crop or apply more
than 15 pt (LV) or 5 lb (SP) per acre per crop.
1B Dimethoate 4 EC
(dimethoate)
0.5-1.0 pt 48 0 if
mechanically
harvested,
14 otherwise
Highly toxic to bees. Do not apply more than 2 pts per acre per
year.
1B Malathion 5EC, 8F
(malathion)
5EC: 1.5-2.5 pt 8F:
1-1.5 pt
12 0 Maximum of two applications per year.
3A *Ambush 25W
(permethrin)
3.2-12.8 oz 12 14 Do not apply more than 1.6 lb active ingredient per season
(102.4 oz).
3A *Asana XL (0.66 EC)
(esfenvalerate)
12 7 Do not apply more than 0.35 lb ai/acre per season (7
applications at highest rate).
3A Aza-Direct
(azadirachtin)
1-2 pts, up to 3.5 pts, if
needed
4 0 Antifeedant, repellant, insect growth regulator. OMRI-listed2.
3A *Mustang
(zeta-cypermethrin)
1.4-4.3 oz 12 1 A maximum of 0.3 lb ai/acre per season may be applied.
3A *Pounce 25 WP
(permethrin)
6.4-12.8 oz 12 14 Do not apply more than 0.8 lb ai/acre per season.
3A Pyganic Crop
Protection EC 5.0
(pyrethrins)
12 0 Harmful to bees. Degrades rapidly in sunlight. Good coverage
essential. OMRI-listed2.
3A *Warrior II
(lambda-cyhalothrin)
24 7 Only exposed insects can be controlled. Do not apply more than
3A, 4A *Endigo ZC
(lambda-cyhalothrin,
thiamethoxam)
24 14
season. Do not use with other Group 4A insecticides.
2019 Vegetable Production Handbook of Florida 257