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Dacthal
W-75: chlorthal diethyl
| Author: |
OMAFRA Staff
|
| Creation Date: |
01 May 2003
|
| Last Reviewed: |
21 January
2008
|
Excerpt from Chapter 4, Publication 75, Guide to Weed Control, Order
this publication
| Trade Names |
Dacthal W-75 |
| Active Ingredient |
chlorthal dimethyl |
| Formulation |
DF |
| Guaranteed active concentration |
75 % |
| Group |
3 |
| Ontario Schedule |
3 |
| Winter
Storage |
C |
| Chemical Family |
Phthalate |
| Crop and/or Non-Crop
Registrations |
Broccoli, Brussel sprouts, cabbage, cauliflower,
dry and snap beans, eggplant, established ornamentals, garlic,
turf, onions, peppers, potatoes, seeded melons, soybeans, strawberries,
sweet potatoes, tomatoes, woody nursery stock. |
| Sensitive Weeds |
Germinating annual grasses and certain annual
broadleaf weeds such as lamb's-quarters,
purslane,
common chickweed,
redroot
pigweed, carpetweed,
and ground-cherry |
| Uptake and Translocation |
Absorbed by roots but not foliage. Does not translocate
within the plant. |
| Basis of Selectivity |
Inhibits growth of germinating seeds; exact mechanism
not yet known. |
| Application Methods |
Must be applied prior to weed seed germination.
Depending on the crop, may be applied pre-plant incorporated,
preemergence, postemergence or post transplant to the crop.
At least 1 cm of water as either rain or irrigation is necessary
to activate the herbicide. In turf, spring or fall application
is satisfactory. |
| Residual Activity |
Average half-life is 100 days in most general
soil types. Effective weed control may be maintained for as long
as 2 months, depending on application rate and soil types. |
| Unique Characteristics |
May be applied over the top of most plants
with no phytotoxic effects. Has little herbicidal activity on
velvetleaf,
common
ragweed, wild
mustard, jimsonweed,
galinsoga,
smartweed,
nut
sedge and cocklebur.
Established turf lawns (with the exception of the bent grasses)
have good tolerance. Turf should not be reseeded for 60 days
after treatment. Use only on mineral soils. |
| Manufacturer / Registrant |
United
Agri Products |
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