Midwest Vegetable Guide - 2022 - 228

Onions and Related Crops - Diseases
Vangard WG (75) (cyprodinil) Garlic, Leek, Onion (Dry),
Onion (Green), Shallot | 10 oz. per acre. REI: 12-hour. PHI:
7-day. FRAC 09.
Viathon (potassium phosphite, tebuconazole) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | 2-3 pts. per acre. REI:
12-hour. PHI: 7-day. FRAC 33, FRAC 03.
Zing! (zoxamide, chlorothalonil) Garlic, Leek, Onion (Dry),
Onion (Green), Shallot | 30 fl. oz. per acre. REI: 12-hour.
PHI: 7-day. FRAC 22, FRAC M05.
Slippery Skin and Sour Rot of Alliums -
Burkholderia Bacteria
Applying fixed copper products may reduce the spread of
these bacterial diseases. For emerged annuals, apply before
planting or crop emergence.
Pesticide
copper products (copper hydroxide, copper octanoate,
copper oxychloride, copper sulfate, copper diammonium
diacetate complex, cuprous oxide) Garlic, Leek, Onion
(Dry), Onion (Green), Shallot | Several formulations of
copper (Badge, Champ, Kocide) are labelled for use and may
slow the spread of bacterial blights. See label for directions.
REI: 4 to 48-hour. PHI: 0-day. FRAC M01. OMRI-listed.
ManKocide (DF) (copper hydroxide, mancozeb) Garlic,
Onion (Dry), Shallot | 1.5-2.25 lbs. per acre. REI: 48-hour.
PHI: 7-day. FRAC M01, FRAC M03.
Smut of Onion - Urocystis Fungus
Non-Pesticide
Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Use
disease-free seed and sets. Plant in areas with adequate
drainage and air movement to reduce leaf wetness and
humidity. Rotate to non-host crop for 3 years. Avoid lateseason
fertilizer applications or overhead irrigation.
Pesticide
Elixir (mancozeb, chlorothalonil) Garlic, Onion (Dry),
Shallot | 3-3.6 lbs. per acre. REI: 24-hour. PHI: 7-day. FRAC
M03, FRAC M05.
mancozeb products (mancozeb) Garlic, Onion (Dry),
Shallot | Apply as an in-furrow drench at time of seedling.
Several formulations of mancozeb (Dithane, Manzate,
Penncozeb) are labeled at various rates. See label for
directions. REI: 24-hour. PHI: 7-day. FRAC M03.
228
White Rot of Alliums - Stromatinia
Fungus
This highly destructive soil pathogen is is related to White
Mold (Sclerotinia), but only infects onions and related
species. There are quarantines in effect to slow its spread
from region to region.
The fungus infects roots, and then moves to the surface of the
bulbs. Inspection of the bulbs will reveal small black pellets
that are the overwintering body of the pathogen.
Non-Pesticide
Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Wash
equipment and footwear between fields to avoid transferring
fungal propagules from infested fields.
Pesticide
Custodia (SC) (azoxystrobin, tebuconazole) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | Apply foliar spray at
8.6-12.9 fl. oz. per acre. For dry bulb onion and garlic, one
application is also allowed at planting with 32 fl. oz. per acre
via in-furrow or chemigation. REI: 12-hour. PHI: 14-day for
dry bulb onions, shallots, and garlic; 7-day for green
bunching onions and leeks, FRAC 11, FRAC 03.
Fontelis (1.67SC) (penthiopyrad) Garlic, Leek, Onion
(Dry), Onion (Green), Shallot | Apply 1.2-1.6 fl. oz. per 1,000
ft. of row as pre-plant, at-plant in-furrow incorporated,
transplant drench or drip irrigation application. Or, use 16-24
fl. oz. as foliar applications REI: 12-hour. PHI: 3-day. FRAC
07.
iprodione products (iprodione) Garlic | 4 pts. per acre.
Formulations of iprodione include Nevado and Rovral. Use
as in-furrow spray preplant. REI: 24-hour. PHI: 7-day. FRAC
02.
Luna Experience (fluopyram, tebuconazole) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | 12.8 fl. oz. per acre.
Suppression only. REI: 12-hour. PHI: 7-day. FRAC 07,
FRAC 03.
Luna Tranquility (SC) (fluopyram, pyrimethanil) Garlic,
Leek, Onion (Dry), Onion (Green), Shallot | 27 fl. oz. per
acre. Suppression only. REI: 12-hour. PHI: 7-day. FRAC 07,
FRAC 09.
Quadris Opti (SC) (azoxystrobin, chlorothalonil) Garlic,
Onion (Dry) | 1.6-3.2 pts. per acre. REI: 12-hour. PHI: 7-day.
FRAC 11, FRAC M05.
Switch 62.5WG (cyprodinil, fludioxonil) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | 11-14 oz. per acre.
REI: 12-hour. PHI: 7-day. FRAC 09, FRAC 12.
Midwest Veg Guide 2022
Midwest Vegetable Guide - 2022

Table of Contents for the Digital Edition of Midwest Vegetable Guide - 2022
