Carrots

Cercospora Leaf Spot

Howard F. Schwartz

(Cercospora carotae): gray to dark brown spots, especially on younger leaves, which may girdle the petiole and cause leaf death. Other controls include crop rotation, old crop removal and irrigation management.

Product list for Cercospora Leaf Spot:

Pesticide
Common/Trade Name

Product per acre

Application Frequency
(days)

Remarks

basic copper sulfate
Basicop
Tri-Basic Copper


3 lb
2-4 pt


7-10 days

 

captan
Captan 50, Orthocide 50
Captan 4F


4 lb
4 pt


6-10 days


4 day REI.

chlorothalonil
Bravo 720, Ensign
Bravo 90DG, DF


1.5-2 pt
1.2-1.5 lb


7-10 days


(7 days to harvest.)
Do not graze or feed debris to livestock.

copper hydroxide
Kocide 606
Kocide 101, Bac-Stop


2.6 pt
2 lb


7-14 days

 

copper sulfate
Top Cop + S


4 pt


7-10 days


(1 day to harvest.)

copper-ammonium carbamate
Copper-Count-N


4-6 pt


7-10 days


Maximum of 5
applications/season.

Pyraclostrobin

Cabrio

8-12 pz

7-14 days

Maximum of 3 applications/season; Maximum of 48 oz/A; 0 days PHI

Pristine (Pyraclostrobin + Boscalid)

 

8 – 10.5 oz

7 – 14 days

Maximum of 6 applications/season;

Maximum of 63 oz/A/season;

(0 days PHI)

RRestricted use pesticide. 1Labeled for chemigation
The information herein is supplied with the understanding that no discrimination is intended and that listing of commercial products, necessary to this guide, implies no endorsement by the authors or the Extension Services of Nebraska, Colorado, Wyoming or Montana. Criticism of products or equipment not listed is neither implied nor intended. Due to constantly changing labels, laws and regulations, the Extension Services can assume no liability for the suggested use of chemicals contained herein. Pesticides must be applied legally complying with all label directions and precautions on the pesticide container and any supplemental labeling and rules of state and federal pesticide regulatory agencies. State rules and regulations and special pesticide use allowances may vary from state to state: contact your State Department of Agriculture for the rules, regulations and allowances applicable in your state and locality.

 

 

Categories: Carrot, Cercospora leaf spot, Diseases

 

Date: 04/011/2007