PEANUT DISEASE CONTROL

Jay W. Chapin Extension Specialist

Disease

Product

Rate /acre

PHI

Comments

Early Leaf Spot

Late Leaf Spot

Pepper Spot

 

 

chlorothalonil

Bravo Weather Stik

Bravo Ultrex

Chemnut 720

Echo 720

Equus 720

Equus 90 DF

Equus DF

GK-Agragold 720

Terranil 6L

 

Tilt + Bravo

 

Abound 2.08 F

 

Folicur 3.6F

 

Headline 2.1 lb/gal

 

1.5 pt

1.36 lb

1.5 pt

1.5 pt

1.5 pt

1.25 lb

1.36 lb

1.5 pt

1.5 pt

 

2 oz + 1 pt

 

12-18.5 oz

 

7.2 oz

 

6-12 oz

 

14

14

14

14

14

14

14

14

14

 

14

 

14

 

14

 

14

Chlorothalonil products are preventative only against leafspot and require excellent coverage.  The other products listed for leafspot control are locally systemic within the leaf and have some “curative” activity.

 

Alternated chemistry programs are recommended to protect against as many diseases as possible (both foliar and soil diseases); and more importantly, to prevent the development of resistance.  See example disease control programs in table below

Web Blotch

chlorothalonil

Bravo Weather Stik

Bravo Ultrex

Chemnut 720

Echo 720

Equus 720

Equus 90 DF

Equus DF

 GK-Agragold 720

Terranil 6L

 

Abound 2.08 F

 

Headline 2.1 lb/gal

 

1.5 pt

1.36 lb

1.5 pt

1.5 pt

1.5 pt

1.25 lb

1.36 lb

1.5 pt

1.5 pt

 

12-18.5 oz

 

6-12 oz

 

14

14

14

14

14

14

14

14

14

 

14

 

14

“Four-block” Folicur programs are susceptible to web blotch under irrigation.  This is another reason that alternated Abound/Folicur or Headline/Folicur programs are preferred.  See table below.   

White Mold

and

Rhizoctonia Limb Rot

 

 

Abound 2.08 F

 

Folicur 3.6F

 

Headline 2.1 lb/gal

 

12-18.5 oz

 

7.2 oz

 

6-12 oz

 

14

 

14

 

14

 

Do not use stickers or crop oil with Abound, Folicur or Headline.  The goal is to wash white mold fungicides into the soil.  Spray before irrigation or rain when possible.  Wait 24 - 48 hours to irrigate in order to also get full leafspot control benefits.  Make sure an application of either Abound, Folicur or Headline occurs NO LATER THAN 60 DAP or July 15th.  White mold must be prevented, and hot weather accelerates white mold growth.

Cylindrocladium Black Rot (CBR)

 

 

Vapam

(metam sodium 42%)

 

10 gal

Pre-plant

   

Vapam must be shanked into the soil (8” depth) and bedded at least 14 days prior to planting.  Soil temperature at 4” depth should be 60°F.  Do not fumigate when rain (1.0” or more) is expected within 48 hrs.  Crop rotation is extremely important in reducing the risk of CBR.  Resistant varieties (e.g. Perry) can also reduce economic injury in CBR infected fields.

Tomato Spotted

Wilt Virus

_

_

_

This viral disease is transmitted by thrips and must be controlled with a combination of varietal resistance, planting date, seeding rate, and in-furrow insecticides.  Where feasible reduced tillage and/or twin-row planting also reduce TSWV injury.  See the latest issue of the Peanut MoneyMaker for recommendations.

 

 

 

 

EXAMPLE PEANUT DISEASE CONTROL PROGRAMS

Treatment

number

Days after planting

Fungicide Program

Alternated

Abound / Folicur

Folicur

Standard

Abound

Standard

Trial Program

Headline /

Folicur

1

30

Bravo 1.5 pt*

Bravo 1.5 pt

Bravo 1.5 pt

none

2

45

Bravo 1.5 pt

Bravo 1.5 pt

Bravo 1.5 pt

none

3

60

Abound 12 oz

Folicur 7.2 oz

Abound 18 oz

Headline 9-12 oz

4

75

Folicur 7.2 oz

Folicur 7.2 oz

Bravo 1.5 pt

Folicur 7.2 oz

5

90

Abound 12 oz

Folicur 7.2 oz

Abound 18 oz

Headline 9-12 oz

6

105

Folicur 7.2 oz

Folicur 7.2 oz

Bravo 1.5 pt

Folicur 7.2 oz

*Generic chlorothalonil products can be substituted for Bravo.  Tilt / Bravo tankmix (2 oz / 1 pt) can be substituted for either of the first 2 Bravo sprays under severe early season leafspot conditions.