As a result of receiving a number of queries regarding the specific off-label application (SOLA) of Fazor (maleic hydrazide) on carrots and parsnips, a global leader in providing pest management and biotechnology products, Dow AgroSciences, has issued some guidance to the industry.
Fazor has SOLAs for use in all varieties of outdoor carrots and parsnips, valid up until December 2013. The application rate in carrots and parsnips is 8kg product/ha, with one application per crop, whereas the MRL for maleic hydrazide remains at 30 mg/kg in these crops.
Dow AgroSciences maintains that to ensure good product stewardship and to get the best from Fazor, it should be applied using a conventional hydraulic sprayer in 350-500 litres of water/ha, when the crop foliage is mature, but not actively growing.
Application timing should be judged on a crop-by-crop basis, but must be before the first frost. It is better that applications are made slightly later rather than earlier; too early and this may impact on yield if the canopy is not mature.
The spray window is typically from mid-October onwards, when five to 25 per cent of foliage is yellow and necrotic and when the crop begins to lean. Green tops are essential for the product to be absorbed and translocated to the roots.
If the crop is to be over-wintered, at least four days should be allowed after application before topping or covering the crop for frost protection. Fazor should not be applied less than three weeks before harvest. It can be used in conjunction with black polythene for in-field storage.
No comments yet