ALWAYS exercise best practice when applying clethodim, is the message for growers hoping to effectively tackle black-grass in oilseed rape crops this coming season.
Using the correct water rate, applying with a water conditioner and ensuring the blackgrass is actively growing, are just some of the factors that contribute to optimum control.
Due to the need to drill oilseed rape early, implementing the highly-endorsed stale seedbed control method is not an option, making the efficacy of blackgrass herbicides such as clethodim, even more crucial.
Arysta LifeScience Product Development & Technical Manager for UK & Ireland, Don Pendergrast said: “Oilseed rape needs a warm soil to encourage correct establishment, which gives the crop a head-start against migrating pests such as cabbage stem flea beetle.
“This means that delaying drilling to allow grass weeds to chit is not an option. Instead, using chemistry such as clethodim correctly, as part of a wider black-grass programme, offers consistent and better control.
“Apply clethodim at a steady speed through medium to fine droplets with the correct water rate of 200l/ha – this is essential for good weed coverage. Because clethodim is formulated with adjuvant technology, using additional adjuvants is not recommended, but we do however, recommend the use of a water conditioner, particularly in hard water areas.
“Unlike many black-grass control products, it’s important to avoid spraying too early. Growers should aim to target the plant when it has three leaves, to improve the uptake of the chemistry.”
Launched four years ago by Arysta LifeScience, Centurion Max is a leading 120g/l clethodim-based product, active on black-grass.
Following feedback from users and trials at Arysta LifeScience, changes to the stewardship have been made to enhance the use-ability of the product. This includes reducing the no-spray window from 14-days to 10-days prior to applying Centurion Max.
Post application, a 14-day no-spray period is in place for herbicides and fungicides, and a 7-day period for nutritional products and insecticides.
Mr Pendergrast added: “Following detailed trials work, we are pleased to be able to adjust the stewardship of Centurion Max in recognition of the importance of nutritional products in crop establishment.
“We will continue to research clethodim so that we can give users improved flexibility, without compromising on crop safety.”
Join Arysta LifeScience this November at The CropTec Show.
Registration is free for all those who pre-register before the event.