(Active substances: glufosinate-ammonium)
Harvest is a dual-purpose product providing you with two important actions in one treatment. As well as delivering contact control of grass and broad-leaved weeds pre-emergence of the potato crop, it also provides desiccation pre-harvest.
Harvest provides you with broad spectrum control of all the main broad-leaved and grass-weeds in the potato crop. Broad-leaved weeds include black-bindweed, charlock, poppy, cleavers, crane’s-bill and groundsel. Grass-weeds controlled include annual meadow-grass black-grass, Italian rye-grass, sterile brome, volunteer cereals and wild oats.
It is also a highly effective desiccant and can be used in sequence with other desiccants or after flailing. This gives you a controlled burn-down, making harvesting easier and protecting the tuber.
For weed control
For weed control
Because Harvest controls emerged annual grass and broad-leaved weeds by contact action, speed of activity is influenced by weather and plant growth conditions. Activity is quickest under bright, warm conditions when target weeds are actively growing. Under optimum growing conditions, initial effects are seen as yellowing within two to three days and kill is usually complete within 10-14 days. Although speed of activity may be affected during less favourable growing conditions (cold/dry), efficacy is unaltered.
Key considerations in choosing the most appropriate application rate are weed spectrum, weed growth stage and whether or not Harvest is to be co-applied with a residual partner.
Use 2 L/ha for contact weed control in typical annual meadow-grass and broad-leaved weed situations, or when tank-mixing with a residual partner. Use 3 L/ha for full spectrum contact control of annual grass and broad-leaved weeds, or for contact control of annual grass-weeds that have reached four leaves.
Harvest should be applied pre-emergence of the crop, when weeds have at least two expanded leaves and are actively growing. The leaves should be dry, ideally in the middle of the day, in 200 – 300 L/ha with conventional flat fan nozzles as a medium quality spray. Use the higher volume where target weeds are large or populations are dense.
Harvest can be used with either of the two conventional desiccation techniques: overall application to the haulm, referred to as ‘desiccation spraying’, or by application to stems after removal of haulm by flailing, referred to as ‘flail and spray’.
For desiccation spraying of ware crops only, apply after the onset of senescence, 14-21 days before harvest. Flail and spray can be used on ware and seed crops after flailing, preferably within 24 hours to prevent re-growth.
For best results maintain a full fungicide programme until desiccation is complete to prevent tuber blight. Allow skins to set if tubers are to be stored and ensure dry, well-ventilated conditions when in store. If you are planning to retain seed from a ware crop, treat the crop as seed. If re-growth occurs after application and a further desiccation spray is required, switch to an alternative product.
For best results apply Harvest to a dry leaf in bright sunny conditions and in 200 - 300 L/ha with conventional flat fan nozzles as a medium quality spray. Use the higher volume when desiccating dense crops. With ‘flail and spray’ apply to stems of approx 15-20 cm, no later than seven days before harvesting the crop.
For weed control
Harvest can be used in conjunction with Artist (flufenacet and metribuzin) to provide residual as well as contact control.