Lentagran WPPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

Wettable powder (WP) formulation containing 45 % w/w pyridate.
A contact herbicide for selective use in cabbages, Brussels sprout and bulb onions.

DIRECTION FOR USE
Important: This information is approved as part of the product label. All instructions within this section must be read carefully in order to obtain safe and successful use of this product. LENTAGRAN WP is a contact herbicide with no residual activity. Application should be made when all weeds have emerged, provided that the crop is within the correct stage of growth and not under stress. Best results are obtained from a fine spray applied whilst the weeds are small and actively growing and before the crop forms a canopy of foliage over the weeds. When the crop canopy is protecting the weeds, spray volume should be increased.

Weeds Controlled
LENTAGRAN WP can be used to control the following weeds: black nightshade, cleavers and fat hen. For optimum control the weeds should be treated at the cotyledon to 4 leaf stage and when the ambient daytime temperature is above 10ºC. Do not apply during periods when night temperatures are consistently below 2°C or when day temperatures exceed 18°C.

Qualified Minor Use Recommendation
Limited evidence suggests that control of the following weed species can also be expected, when they are treated in the early seedling stages (cotyledon – 2 leaf): Common chickweed, red dead-nettle, henbit dead-nettle, scarlet pimpernel, common fumitory, prickly sowthistle, smooth sowthistle and common amaranth.

Application
Cabbage and Brussels Sprout
Timing: Apply LENTAGRAN WP once the crop has 4 fully expanded leaves. If the crop is transplanted allow 2 weeks after planting for plants to establish. Applications should be made before the 6 leaf stage (GS 16 BBCH). A crystal violet test should be carried out to ensure the leaves have a good wax layer before applying LENTAGRAN WP. There may be some yellowing of the older leaves but this effect is no longer visible after 8 weeks and has no influence on yield or time of harvest. Do not apply LENTAGRAN WP in mixture with or within 14 days of any other pesticides or product which may result in de-waxing of the crop. Optimum weed control will result if LENTAGRAN WP is applied when all the weeds have emerged. In view of the wide range of cabbage cultivars available, it is recommended that selectivity trials are conducted locally before applying LENTAGRAN WP, especially on varieties that are newly introduced. Under unfavourable conditions, LENTAGRAN WP may lead to crop damage when applied at 2-4 leaf stage (cabbage) especially when the crop is not sufficiently rooted after transplantation. The latest application timing is before the 6 leaf stage.
Dose: Apply LENTAGRAN WP at a maximum individual dose rate of 2 kg/ha. Apply LENTAGRAN WP at a maximum total dose rate of 2 kg/ha/crop.

Bulb onion
Timing: Applications can commence once the crop has 4 leaves. If the crop is transplanted allow 2 weeks after planting for plants to establish. Do not apply LENTAGRAN WP in mixture with or within 14 days of any other pesticides or product which may result in de-waxing of the crop. Optimum weed control will result if LENTAGRAN WP is applied when all weeds have emerged. A crystal violet test should be carried out to ensure the leaves have a good wax layer before applying LENTAGRAN WP. There may be some yellowing of the older leaves but this effect is no longer visible after 8 weeks and has no influence on yield or time of harvest.
Dose: Apply LENTAGRAN WP at a maximum individual dose rate of 2kg /ha. Apply LENTAGRAN WP at a maximum total dose rate of 2 kg/ha/crop.

PREPARATION OF THE SPRAY SOLUTION
LENTAGRAN WP should not be creamed in a bucket but added directly to the spray tank. Half fill the spray tank with clean water and begin agitation. Add the required number of water soluble bags to the tank and complete filling. Continue agitation until spraying is completed. Thoroughly wash all spraying equipment with water and a wetting agent immediately after use.

Water volume
Apply in no less than 325 litres water per hectare up to 400 litres of water per hectare at a minimum pressure of 2 bar as good spray coverage is essential for effective weed control.

Spray Nozzles
A FINE quality spray (as defined by BCPC) is preferred for application of LENTAGRAN WP. Choice of nozzle is determined by consulting manufacturer’s literature and selecting a nozzle that produces a fine quality spray at an output consistent with the nozzle spacing on the boom, chosen forward speed, required spray volume and operating in the range 2-3 bar.