Pest solutions
Weed Control
Rye-grass in the West of England

Rye-grass might become as difficult to control as black-grass growers are being warned, as reports show evolving resistance to herbicides in rye-grass weed populations in the west of England.

Stuart Jackson, an agronomist at Dow AgroSciences, says growers should aim to optimise rye-grass control.

A report completed in 2010 by Rothamsted Research found enhanced metabolism and ACCase target site resistance (fop and dim) mechanisms in 450 rye-grass samples taken from 33 counties in England.

The first resistance was found in 1990 but no ALS target site resistance has been confirmed to date.

Mr Jackson says: “No surveys have been done since so I do not know whether it [the rate of ALS resistance] has changed.

I suspect the next report will show [overall] resistance in rye-grass has increased.”

Mr Jackson says he believes the agronomy practices which are typically used in areas where rye-grass is a problem weed will lead to an increasing incidence of resistance.

Although rye-grass control can be an issue in the east of England, Mr Jackson says reports show it seems to be a problem where farms are predominately mixed, in the West.

He says: “Rye-grass control seems to be focusing on one application in spring, rather than a programme of herbicides.

“Rye-grass can be more competitive than black-grass. It produces lots of seeds and populations can build very quickly.

“Most rye-grass control happens in spring but this is when the plants are bigger, which is why growers need to start a programme in autumn.

“Growers with a rye-grass problem need to take management strategies of black-grass to rye-grass.”

Trials by Dow AgroSciences have shown control is best when the target weed has a few days of active growth before and after the herbicide application.

In order for active growth to occur, the soil should be about 6degC or above at 10cm (4in) depth, says Mr Jackson.

The company recommends starting a programme of herbicides in autumn, rather than just having one application in spring.

Mr Jackson says: “There is no doubt about it, a programme of herbicides gives better results, but do not delay applications.”


1、Herbicide application: flufenacet, pendimethalin and prosulfocarb. A programme of herbicides is suggested to start in autumn, rather than just having one application in spring. (control is best when the target weed has a few days of active growth before and after the herbicide application)

2、Cultural control methods: delayed drilling (drilling the worst-affected fields last)

From: agropages


Home  |  Pesticide  | Adjuvant  | Sitemap  | News Center  |  Contact Us
Address: No.2,Lane 1123,Kangqiao Road, Pudong New Area, Shanghai 201315 ,China   Tel : 0086 21 38122007   Fax : 0086 21 38122006    Email:
Keywords:Organic Silicone Agricultural Additive, Polyether Modified Trisiloxane, Organic Silicone Surface Agent, Wetter, Spray Regulator, Pests, Rice, Rice Weevil,
Aggregate Sheath Spot Of Rice, Piricularia Leaf Spot Of Rice, Brown Spot, Bipolaris Oryzae, Panicle Mite, Cockspur Grass, Cyperus Difformis, Forb Steppe,
Banded Sclerotial Blight, Tea, Tea Mosquito Bug, Helopeltis Antonii, Empoasca Flavescens, Tea Green Leafhopper, Tea Tortrix-Caterpillar,
Homona Coffearia, Tea Flush Worm, Cydia Leucostoma, Scarlet Tea Mite, Brevipalpus Phoenicis, Soybean, Phytophthora, Rhizoctonia,
Soybean Aphids, Fusarium Wilt, Wheat, Wheat Aphids, Armyworms On Wheat, Greenbugs, Cereal Leaf Beetle,
Wheat Stripe And Stem Rust, Corn, Root-Knot Nematode, Gray Leaf Spot, Northern Corn Leaf Blight,
Sweet Corn Rust, Aspergillus Flavus, Aspergillus Ear Rot