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. |
|||||