Vegetable Production Guide

Garlic
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Table 3 Garlic Disease Control

This section was updated - 27 July 2018

Table 3 Garlic Disease Control

 

Product

Rate

*PHI

Comments

Botrytis Leaf Blight & Downy Mildew

Serenade Opti

(Bacillus subtilis)
 
smileyUsed in organics
Leaf Blight:
1.7 to 2.5 kg/ha
(690 to 1000 g/acre)

Downey Mildew:
1.7 to 3.3 kg/ha
(690 to 1300 g/acre)
0
  • Suppression only.
  • Use Leaf Blight rate to also suppress Botrytis neck rot.
  • Repeat using a 7 to 10 day interval.
  • smileySerenade Soil (PCP# 30647) is OMRI-Canada listed.  Check with your certification body before using in an organic operation.  

Serenade Max

(Bacillus subtilis)
 
Note:  no longer produced.
 
smileyUsed in organics
Leaf Blight:
3.0 to 4.5 kg/ha
(1.2 to 1.8 kg/acre)

Downey Mildew:
3.0 to 6.0 kg/ha
(1.2 to 2.4 kg/acre)

Cueva

(copper octanoate)
 
Group M1
Use a 0.5% to 2% solution at 470 to 940 L/ha (190 to 380 L/acre) 1
  • For a 0.5% solution, mix 1 part Cueva to 200 parts water.
  • For a 2% solution, mix 1 part Cueva to 50 parts water.
  • Repeat at 7 to 10 day intervals.
  • Repeat at 5 to 7 day intervals following heavy rain or when disease pressure is high.
  • Do not make more than 15 applications per year.
  • Time applications so that 12 hours of dry weather follow application.
  • Do not re-enter treated area for 4 hours.

Pristine WG

(boscalid & pyraclostrobin)

Group 7 & 11
1000 to 1300 g/ ha
(400 to 520 g/acre)
7
  • Suppression of Downy Mildew.
  • Begin applications prior to disease development and continue on a 7 to 14 day schedule.
  • Do not apply more than 6 times per season.
  • Do not make sequential applications when suppressing downy mildew, but follow up 5 to 7 days later using a fungicide from a different group.
  • Do not enter treated areas until residues have dried.

Sercadis

(fluxapyroxad)
 
Group 7
333 to 666 mL/ha
(135 to 270 mL/acre)

Apply in 100 L/ha (40 L/acre) of water
7
  • Controls Botrytis Leaf Blight only.
  • Repeat at 7 to 14 day intervals.
  • Do not make more than 3 applications per season.
  • Do not apply more than 2.0 L/ha (809 mL/acre) per season
  • No more than 2 consecutive applications before alternating with a fungicide with a different mode of action.
  • Do not enter treated area for 12 hours.
  • For crops not listed, observe a plant back interval of 1 year.

Allegro 500 F

(fluazinam)

Group 29
1.16 L/ha
(470 mL/acre)

Apply in 100 L/ha (40 L/acre)
7
  • Suppression of botrytis leaf blight only.
  • Also suppresses purple blotch.
  • Apply as a foliar broadcast spray.
  • Repeat using a 7 to 10 day application interval.
  • Do not make more than 5 applications.
  • See label for plantback interval details.
  • Do not enter treated area for 3 days for hand weeding, and for all other activities for 24 hours.

Botrytis Leaf Blight and Botrytis Neck Rot

Scala SC

(pyrimethanil)

Group 9
2.0 L/ha
(800 mL/acre)

Apply in at least 300 L/ha (121 L/acre) of water 
7
  • Repeat using a 7 to 14 day application interval.
  • Maximum application of 6 L/ha (2.4 L/acre) per season.
  • Do not enter treated area for 24 hours for hand thinning or 12 hours for all other activities.

Botrytis Leaf Blight and Suppression of Purple Blotch

Switch 62.5 WG

(cyprodinil & fludioxonil)

Group 9 & 12
775 to 975 g/ha
(314 to 395 g/acre)

Apply in 200 L/ha (80 L/acre) of water
7
  • Repeat using a 7 to 14 day application interval.
  • Do not make more than 3 applications per year.
  • Observe a 30 day plantback interval for crops not listed.
  • Do not enter treated area for hand weeding for 3 days, and for all other activities do not re-enter for 12 hours.

Suppression of Stemphylium Leaf Blight and Control of Garlic Rust

Aprovia

(benzovindiflupyr)

Group 7
750 mL/ha
(300 mL/acre)

Apply in at least 150 to 600 L/ha (60 to 240 L/acre) of water
7
  • Apply when plants are 5 to 10 cm high.
  • Repeat using a 7 to 14 day interval.
  • Do not apply more than 4 times per season.
  • Do not apply more than 3 L/ha (1.2 L/acre) per season.

Downy Mildew

Quadris Top

(azoxystrobin/ difenoconazole)

Group 11 & 3

710 to 1000 mL/ha
(290 to 400 mL/acre)

Apply in at least 150 L/ha (60 L/acre) of water.

7
  • Repeat at 7 to 14 day intervals.
  • Do not apply more than 4 times per year.
  • Do not re-enter treated areas for 12 hours.
  • Observe a plant back interval of 60 days for crops not listed on this label or the Inspire label. 

Cabrio EG

(pyraclostrobin)

Group 11
560 to 840 g/ha
(220 to 340 g/acre)

Apply in at least 225 L/ha (90 L/acre) of water
7
  • Repeat at 10 day intervals.
  • No more than 3 applications per season.
  • Do not use treated crops for feed.
  • Do not enter treated area for 12 hours.

Reason 500SC

(fenamidone)

Group 11
400 mL/ha
(160 mL/acre)
7
  • Suppression only.
  • Repeat at 5 to 10 day intervals.
  • Do not apply more than 4 times per year.
  • Do not enter treated area until residues have dried.

Torrent 400SC

(cyazofamid)

Group 21

0.20 L/ha (80 mL/acre)
 
Apply in 200 to 600 L/ha (80 to 240 L/acre) of water.
0
  • Tank-mix with a non-ionic or organosilicone surfactant such as Sylgard 309 at the manufacturer's label recommendations.
  • Repeat using a 7 to 10 day interval.
  • Do not apply more than 6 times per crop per year.
  • Observe a plantback interval of 30 days for crops not listed.
  • Do not enter treated area for 12 hours.

Revus

(mandipropamid)

Group 40
400 to 600 mL/ha
(160 to 240 mL/acre )
7
  • Use a non-ionic adjuvant (0.125% v/v).
  • Repeat at 7 day intervals.
  • Do not apply more than 4 times per year.
  • Do not enter treated area for 12 hours.
  • Apply in at least 100 L/ha (40L/acre) of water

Acrobat 50 WP

(dimethomorph)
 
Note:  no longer produced.

 
450 g/ha
(182 g/acre)
0
  • Suppression only.
  • Apply as a tank mix with another fungicide in this table that is active against downy mildew. Observe most restrictive directions including rate, PHI and re-entry interval.
  • Apply in at least 200 L/ha (80 L/acre) of water.
  • Repeat at 5 to 7day spray intervals.
  • Maximum of 5 applications per season
  • Do not re-enter treated area for 12 hours.
  • Group 40 fungicides.

Forum

(dimethomorph)

450 mL/ha

(182 mL/acre)

Phostrol

(mono- and dibasic sodium, potassium, and ammonium phosphites)
 
Group 33
2.9 to 4.3 L/ha (1.2 to 1.7 L/acre)
 
Apply in 225 L/ha (90 L/acre) of water.
0
  • Suppression only.
  • Repeat using a 7 to 14 day application interval.
  • Do not make more than 7 applications per season.
  • Do no re-enter treated area for 12 hours.

Zampro

(ametoctradin & dimethomorph)

Group 40 & 45

1.0 L/ha
(400 mL  /acre)

Apply in at least 200 L/ha (80 L/acre) of water.
0
  • Repeat at 5 to 7 day intervals.
  • Do not apply more than 3 times per season.
  • Use a spreading/penetrating adjuvant.
  • Do not re-enter for hand harvesting for 1 day.  For all other activities, do not re-enter for 12 hours.
  • Observe a plantback interval of 30 days for all crops not on the label.

Orondis

(oxathiapiprolin)

Group 49

88 to 350 mL/ha (35 to 140 mL/acre

Apply in 110 L/ha (45 L/acre) of water.

0
  • Repeat using a 5 to 10 day interval.
  • Where multiple crop cycles are produced in the same year, do not make more than 6 applications/ha/year.
  • Do not apply more than 1.40 L/ha (570 mL/acre) per season.
  • Do not re-enter treated area for 12 hours.

Green Mould (Penicillium)

Rovral WP

(iprodione)
4.0 g/L of water N/A
  • Apply as a seed dip.
  • Dip seed for 30 minutes in a suspension of Rovral and water, immediately before planting.
  • Make one application in the fall.
  • Group 2 fungicides
  • Note:  Registration cancelled.  Last date of use for remaining stocks is June 21, 2021

Rovral WDG

(iprodione) 
 
Note:  No longer produced. 
*PHI = Pre-harvest interval
BUFFERS – Refer to product label for buffer requirements. See also Pesticide Regulations and Safety section of this guide.
PESTICIDE GROUP DETAILS – see Pesticide Toxicity Table of this guide.
smileyOMRI-Canada = Organic Materials Review Institute of Canada

 

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