Midwest Vegetable Guide - 2022 - 226

Onions and Related Crops - Diseases
Luna Tranquility (SC) (fluopyram, pyrimethanil) Garlic,
Leek, Onion (Dry), Onion (Green), Shallot | 16-27 fl. oz. per
acre. REI: 12-hour. PHI: 7-day. FRAC 07, FRAC 09.
mancozeb products (mancozeb) Garlic, Onion (Dry),
Shallot | Several formulations of mancozeb (Dithane,
Manzate, Penncozeb) are labeled at various rates. See label
for directions. REI: 24-hour. PHI: 7-day. FRAC M03.
Merivon (fluxapyroxad, pyraclostrobin) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | 8-11 fl. oz. per acre.
REI: 12-hour. PHI: 7-day. FRAC 07, FRAC 11.
Omega 500F (4.17) (fluazinam) Garlic, Onion (Dry),
Shallot | 1 pt. per acre. REI: 12-hour. PHI: 7-day. FRAC 29.
Pristine 38WG (boscalid, pyraclostrobin) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | 14.5-18.5 oz. per acre.
REI: 12-hour. PHI: 7-day. FRAC 07, FRAC 11.
Quadris Opti (SC) (azoxystrobin, chlorothalonil) Garlic,
Leek, Onion (Dry), Onion (Green), Shallot | 1.6-3.2 pts. per
acre. REI: 12-hour. PHI: 7-day for dry bulb onion, shallots,
and garlic; 14-day for green bunching onions and leeks.
FRAC 11, FRAC M05.
Scala (SC) (5) (pyrimethanil) Garlic, Leek, Onion (Dry),
Onion (Green), Shallot | 18 fl. oz. per acre. Use 9-18 fl. oz.
per acre rate when tank mixing with another effective
fungicide. REI: 12-hour. PHI: 7-day. FRAC 09.
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.
Vangard WG (75) (cyprodinil) Garlic, Leek, Onion (Dry),
Onion (Green), Shallot | 10 oz. per acre. REI: 12-hour. PHI:
7-day. FRAC 09.
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.
Pink Root of Alliums - Phoma Fungus
Plants infected with pink root may appear to be nutrient
deficient or drought-stressed and stunted. Affected plants
have fewer leaves and begin to form bulbs early. The
pathogen can survive in soil as deep as 17.7 inches.
Temperatures at 75-82 degrees F favor disease development.
The pathogen can spread by onion sets and in infested soil
carried by machinery, dust storms, and surface run-off.
Pesticide
Fontelis (1.67SC) (penthiopyrad) Onion (Dry) | 24 fl. oz.
per acre. Michigan only-applicators must possess Section 2
226
(ee) label. Use as a preplant broadcast and incorporate, then
follow with a broadcast or banded application before plants
are 3 inches tall before a rain for incorporation. REI: 12-hour.
PHI: 3-day. FRAC 07.
Purple Blotch of Alliums - Alternaria
Fungus
Non-Pesticide
Garlic, Leek, Onion (Dry), Onion (Green), Shallot | Use
disease-free seeds and sets. Rotate to non-host crops for 3-4
years. Monitor thrips populations. Prompt destruction of the
finished crop and cull piles with tillage to rapidly breakdown
tissue is an important method to prevent disease build-up.
Pesticide
Aprovia Top (difenoconazole, benzovindiflupyr) Onion
(Dry), Onion (Green) | 10.5 fl. oz. per acre. REI: 12-hour.
PHI: 7-day. FRAC 03, FRAC 07.
azoxystrobin products (azoxystrobin) Garlic, Leek, Onion
(Dry), Onion (Green), Shallot | Use 2 lb. a.i. per gallon
formulations (Quadris) at 6.0-12.0 fl. oz. per acre. Use 3.3 lb.
per gallon formulations (Azteroid) at 3.9-7.8 fl. oz. per acre.
Use 0.5 lb. per gallon formulations (Heritage) on greenhouse
transplants only at 0.08-0.15 oz. per 1,000 sq. ft. REI: 4-hour.
PHI: 0-day. FRAC 11.
Cabrio EG (20) (pyraclostrobin) Garlic, Leek, Onion (Dry),
Onion (Green), Shallot | 8-12 oz. per acre. REI: 12-hour.
PHI: 7-day. FRAC 11.
Catamaran (potassium phosphite, chlorothalonil) Garlic,
Leek, Onion (Dry), Onion (Green), Shallot | 4-7 pts. per acre.
REI: 12-hour. PHI: 7-day for dry bulb onion, shallot and
garlic; 14-day for green bunching onion and leek. FRAC 33,
FRAC M05.
chlorothalonil products (chlorothalonil) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | Several formulations
of chlorothalonil (Bravo, Echo, Equus) are labeled at various
rates. See label for directions. REI: 12-hour. PHI: 7-day for
dry bulb onion, shallot, and garlic; 14-day for green bunching
onion and leek. FRAC M05.
Custodia (SC) (azoxystrobin, tebuconazole) Garlic, Leek,
Onion (Dry), Onion (Green), Shallot | 8.6-12.9 fl. oz. per
acre. REI: 12-hour. PHI: 7-day. FRAC 11, FRAC 03.
Cymbol Advance (L) (chlorothalonil, cymoxanil) Garlic,
Leek, Onion (Dry), Onion (Green), Shallot | 1.6-2.4 pts. per
acre. Use lower rates for dry bulb onions and garlic. Other
formulations are available such as Ariston. REI: 12-hour.
PHI: 7-day for dry bulb onions, and garlic; 14-day for green
bunching onions, shallots, leeks. FRAC M05, FRAC 27.
Midwest Veg Guide 2022
Midwest Vegetable Guide - 2022

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