Midwest Vegetable Guide - 2022 - 133

Cucurbit Crops - Diseases
inoculum with weed control and rotate to non-Cucurbit and
non-Solanaceous crops for >4 years. Do not irrigate with
surface water. Prompt destruction of the finished crop with
tillage to rapidly breakdown tissue is an important method to
prevent disease build-up.
Pesticide
Elumin (4SC) (ethaboxam) Cantaloupe/Muskmelon,
Cucumber, Pumpkin, Squash, Watermelon | 8 fl. oz. per acre.
Tank-mixing this product with a contact fungicide such as
chlorothalonil or mancozeb will help reduce resistance
concerns. REI: 12-hour. PHI: 2-day. FRAC 22.
Forum (4.17SC) (dimethomorph) Cantaloupe/Muskmelon,
Cucumber, Pumpkin, Squash, Watermelon | 6 fl. oz. per acre.
REI: 12-hour. PHI: 0-day. FRAC 40.
Gavel 75DF (zoxamide, mancozeb)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 1.5-2.0 lbs. per acre. REI: 48-hour. PHI: 5-day.
FRAC 22, FRAC M03.
Orondis Gold (DC) (oxathiapiprolin, mefenoxam)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 28-55 fl. oz. per acre. Use as an at-plant soil
drench, banded spray in furrow, or through drip irrigation. Do
not follow soil applications of Orondis Gold with foliar
applications of Orondis Opti, or Orondis Ultra. REI: 4-hour.
PHI: 0-day. FRAC 49, FRAC 04.
Orondis Ultra Premix (SC) (oxathiapiprolin,
mandipropamid) Cantaloupe/Muskmelon, Cucumber,
Pumpkin, Squash, Watermelon | 5.5-8.0 fl. oz. per acre. Make
no more than 2 sequential applications before rotating to a
different mode of action. When 3 fungicide applications are
used, Orondis can be in no more than 33% of the
applications. Do not follow soil applications of Orondis Gold.
REI: 4-hour. PHI: 0-day. FRAC 49, FRAC 40.
phosphite and phosphorous acid products (phosphorous
acid, potassium phosphite, mono-dipotassium salts of
phosphorous acid, mono- and dibasic sodium, potassium,
and ammonium phosphites, fosetyl-aluminum)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | Several phosphite or phosphorus acid products
(Aliette, Phostrol, ProPhyt, Rampart) are labeled at various
rates. Label includes different crops, PHIs, resistance
instructions, and other important information. Some
manufacturers recommend tank-mixing. These products may
be used in a preventative program until the disease is
observed. REI: 4 to 12-hour. FRAC 33.
Presidio (4SC) (fluopicolide) Cantaloupe/Muskmelon,
Cucumber, Pumpkin, Squash, Watermelon | 4 fl. oz. per acre.
REI: 12-hour. PHI: 2-day. FRAC 43.
Ranman 400SC (34.5) (cyazofamid)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 2.75 fl. oz. per acre. Mixing Ranman with a
nonionic surfactant may increase efficacy. REI: 12-hour.
PHI: 0-day. FRAC 21.
Revus (2.08SC) (mandipropamid) Cantaloupe/Muskmelon,
Cucumber, Pumpkin, Squash, Watermelon | 8 fl. oz. per acre.
Suppression only. REI: 4-hour. PHI: 0-day. FRAC 40.
Tanos (DF) (famoxadone, cymoxanil)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 8-10 oz. per acre. Suppression only. REI: 12hour.
PHI: 3-day. FRAC 11, FRAC 27.
Zampro (SC) (ametoctradin, dimethomorph)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 14 fl. oz. per acre. REI: 12-hour. PHI: 0-day.
FRAC 45, FRAC 40.
Powdery Mildew of Cucurbits -
Podosphaera Fungus
Powdery mildew is primarily a disease of cantaloupe,
cucumber, pumpkin, and squash. This disease does not
require leaf wetness for disease initiation or spread.
At vine touch, begin systemic fungicide applications at bush
stage of pumpkin growth. Protect pumpkin vines until
approximately 21 days from last harvest. Some pumpkin
varieties have partial resistance to powdery mildew.
Fungicide resistance has been detected in the Midwest.
Fungicides in Groups 1 and 11 may not be effective.
Fungicides that are affected include Cabrio, Flint, Procure,
Quintec, Quadris, Satori, Sovran, Torino and Topsin.
Alternate fungicides between MOA groups.
Non-Pesticide
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | Rotate to non-Cucurbit crops for 2 years.
Resistant or partially resistant cantaloupe, cucumber and
pumpkin cultivars are available. Prompt destruction of the
finished crop with tillage to rapidly breakdown tissue is an
important method to prevent disease build-up.
Pesticide
Aprovia Top (difenoconazole, benzovindiflupyr)
Cantaloupe/Muskmelon, Cucumber, Pumpkin, Squash,
Watermelon | 10.5-13.5 fl. oz. per acre. REI: 12-hour. PHI: 0day.
FRAC 03, FRAC 07.
Fontelis (1.67SC) (penthiopyrad) Cantaloupe/Muskmelon,
Cucumber, Pumpkin, Squash, Watermelon | 12-16 fl. oz. per
Midwest Veg Guide 2022
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Midwest Vegetable Guide - 2022

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