Forage: Leaf Spot (Leptosphaerulina
trifolii)
Pub 812: Field Crop Protection
Guide >
Chapter
3: Forages > Leaf Spot
Field Crop Protection Guide 2011-2012, Order
2011-2012 publication
Table of Contents
- Integrated Pest Management Options
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Integrated Pest Management Options
Foliar Treatment
Timely harvesting of forages is important to reduce leaf loss and
minimize disease in the regrowth. There are no practical control
strategies available for leaf spot diseases in forages. Balance
the time of harvest between the optimum stage for highest protein
(bud stage in alfalfa) and the level of leaf spot disease, as leaf
spot can reduce the protein level in legume leaves.
| Active Ingredient |
boscalid |
| Trade Name |
Lance |
| Rate per hectare
(product) |
420 g per ha |
| Rate per acre
(product) |
170 g per ac |
| Comments |
For use in alfalfaseed production only. Ground and
aerial application. Apply at 20%-50% flowering. Apply every
7-14 days if disease persists or weather conditions are favourable
for disease development. Do not graze or feed treated hay to
livestock. Maximum 3 applications/yr. 12-hr re-entry period. |
| Active ingredient |
mancozeb |
| Trade name |
Dithane DG |
| Rate per hectare (product) |
1.46 kg per ha |
| Rate per acre (product) |
584 g per ac |
| Comments |
For use in alfalfa seed production only. Apply prior
to 50% bloom. Repeat 7-10 days after first application and 10
days after second application. Do not graze treated crop or
cut for hay. Maximum 3 applications/yr. |
| Active ingredient |
mancozeb |
| Trade name |
Rainshield NT |
| Rate per hectare (product) |
1.46 kg per ha |
| Rate per acre (product) |
584 g per ac |
| Comments |
For use in alfalfa seed production only. Apply prior
to 50% bloom. Repeat 7-10 days after first application and 10
days after second application. Do not graze treated crop or
cut for hay. Maximum 3 applications/yr. |
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