There is a noticeable increase this year in the level of chickweed in silage and grazing pastures. This appears to be due to very tight grazing during last summer’s drought, which resulted in a lot of chickweed seeds being disturbed. These seeds germinated during the autumn and the chickweed continued to grow during the mild winter and spring. Severe infestations can effectively smother the grass, resulting in a massive drop in output and impairment of silage quality.
DoxstarPro is highly effective on chickweed. It is also powerful on dandelions, which also appear to have increased this year.
PastorTrio Where chickweed is the dominant weed in a silage sward and where weeds such as docks also exist, PastorTrio, another translocated herbicide, is the perfect solution. It contains the powerful active ingredient florasulam and the two tried and tested ingredients fluroxypyr and clopyralid, ensuring a very wide spectrum of weed control. In addition to chickweed, docks and dandelions, PastorTrio is highly effective on a wide range of other weeds, including thistles, daisies and plantain.
Envy
Envy, the recently launched herbicide, is another effective option. Containing the two active ingredients fluroxypyr and florasulam, it is powerful on the same range of weeds as PastorTrio, with the exception of thistles.
As with DoxstarPro, both PastorTrio and Envy should be applied as a pre-harvest application when weeds are actively growing.
In addition, there should be an interval of at least three weeks between application and silage cutting in order for the chemicals to be fully translocated to the root system of the weeds.
Mouse-eared chickweed in reseeds
There is evidence that mouse-eared chickweed is a significant problem in new swards that were sown last autumn. It is spread primarily by seeds, which can remain viable in the soil for years. Therefore, if not controlled early, it can rapidly take over the sward.
Mouse-eared chickweed is a problem in new swards sown last autumn “Mouse eared chickweed differs from common chickweed as it contains many tiny little hairs on the leaves.These hairs can prevent the tiny spray droplets reaching the plant leaf cuticle. This makes choice of herbicide critical,” said Chris.
He said Envy and PastorTrio, which contain both fluroxypyr and florasulam, are particularly effective on mouse-eared chickweed, compared to products that contain fluroxypyr only.
Your silage herbicide guide
- If docks are the dominant weed in a silage sward, use DoxstarPro. It is also highly effective on chickweed and dandelions.
- If weeds such as chickweed are the dominant problem, use PastorTrio. It also controls docks, dandelions, daisies, thistles and plantain.
- Envy is powerful on the same range of weeds as PastorTrio, except thistles.
- Both PastorTrio and Envy are effective on mouse-eared chickweed, a particular problem in new swards that were sown last autum
