This edition's FAQ - Can I mix Boxer with Atlantis?
Wheat Bulb fly Prospects 2011
Wheat Bulb fly egg numbers are reported to be at very high levels in many parts of England and Scotland. Growers with cereal crops potentially under threat should carry out Risk Assessments.
Growers with late-drilled, backward or poorly developing crops should undertake a Risk Assessment to clarify the best course of action on their farms. The result of the Risk Assessment will give guidance as to whether an application of Dursban* WG is justified.
As in previous years, Dow AgroSciences, in conjunction with ADAS, will be carrying out Pestwatch monitoring of Wheat Bulb fly egg-hatch and subsequent plant invasion. High risk sites have been selected in eastern and northern England and the results of monitoring will be published in Pestwatch reports from now onwards.
Dursban WG provides good control of Wheat Bulb fly and protects crops from attack. Applications at egg-hatch, before larvae have entered the plant, means damage is reduced by not having to wait for dead-hearts before deciding to spray. Dursban WG has a residual life in the soil which means that most larvae will be controlled as they hatch over a period of time.
Wheat Bulb fly can be a devastating problem
Attacked crops are unlikely to yield their full potential
Badly attacked crops could need re-drilling
Carry out a Risk Assessment on all crops believed to be at risk
Dursban WG eliminates the pest before it damages plants
Dursban WG has a residual life in the soil which means that most larvae will be controlled as they hatch over a period of time
Applications of Dursban WG can be made to frosty ground, but do not tank mix other products under these circumstances
Equity* also has recommendations for Wheat Bulb fly.
Any winter oilseed rape fields still to be treated with Kerb* Flo must have applications made before the latest allowable time of application - 31st January.
Where applications of Kerb Flo were planned last autumn, but delayed due to frost and snow, or other factors, these applications must be completed before the 31st January. Even the most advanced crop canopies will now be open, from frost or pigeon grazing, allowing treatments of propyzamide to reach the soil surface.
Dow AgroSciences' research confirms that worthwhile levels of blackgrass control, and other grassweeds, can still be achieved even from January treatments with Kerb Flo. Great care must be taken to avoid treating waterlogged fields and the temptation to use frozen ground as a means of access should be resisted. Please do everything possible to prevent applications of propyzamide reaching watercourses.
Applications of Kerb Flo must be completed by 31st January
Good levels of blackgrass control are still possible from January treatments
The activity of propyzamide, the active ingredient in Kerb Flo, is maximised under cooler soil conditions
Propyzamide is a residual herbicide with root uptake that requires even distribution in the soil profile
Where crops have a well-established canopy, winter die-back will allow applications to reach the soil surface
Increased rates should be used where blackgrass resistance has been confirmed
Use is recommended in tank mix or sequence with graminicides
Take all precautions to avoid contamination of watercourses
There is currently no known strain of blackgrass exhibiting any degree of resistance to propyzamide.
Yes. Boxer* can be applied either on its own or tank-mixed or sequenced with a wide range of ALS herbicides including Atlantis WG and other products containing mesosulfuron-methyl and iodosulfuron-methyl sodium.
Extensive trials work and several years of commercial use clearly shows there is no antagonism when Boxer is tank mixed with Atlantis WG. This tank mix has been approved by CRD (Chemicals Regulation Directorate). The full list of CRD approved ALS joint applications is included below.
Early cleaver control is more important than ever this year due to the backward, open crops and lack of autumn residual applications.
Where Atlantis WG has yet to be applied then tank mix Boxer at 75 ml/ha with Atlantis WG and get:
Robust cleavers control
Added groundsel, poppy and volunteer bean activity (size dependent)
Removal of the most competitive weed early - maximise crop yield
No additional following crop or cultivation restrictions over and above Atlantis WG alone
2 key problems solved in one pass - blackgrass and cleavers
Boxer Dose Rate: 50 ml/ha + Atlantis WG - cleavers up to 100 mm high and clear growth
75 ml/ha + Atlantis WG - cleavers up to 100 mm high/across and post frosty conditions
100 ml/ha alone - cleavers up to 200mm high / across ( N.B.This rate is after 1st February).
APPROVED JOINT APPLICATIONS FOR BOXER
Only one other product with an ALS inhibitor mode of action may be applied to a cereal crop treated with Boxer. However a further application of Boxer or another product containing florasulam may also be made providing the maximum total dose of florasulam is not exceeded1.
Boxer may be applied in joint application to the same cereal crop with one of the following ALS products1:
1 The maximum total dose of florasulam applied to the crop must not exceed 7.5 g. For autumn planted crops a maximum total dose of 3.75 g of florasulam must be observed for applications made between crop emergence in the year of planting and February 1st in the year of harvest.
Subscribing to Dow AgroSciences' Agronomy Update & Pestwatch gives eligibility for 1 Crop Protection BASIS Points annually. Please include course name "Agronomy Update & Pestwatch" and number "CP/16442/1011/G" on your training record. These details apply until 31st May 2011.
You may unsubscribe at any time, or contact us if you have any questions.
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