PRE-EMERGENCE WEED CONTROL IN NURSERY CROPS
The term "pre-emergence" when used in reference to weed control usually means an application of chemicals after planting, but before the emergence of the crop or weeds. In the case of transplants or liners, however, it would be pre-emergence to the weeds only. The selection of the chemicals to be used for pre-emergence weed control will depend on whether it is being used on direct seeded crops or whether it is to be applied as a directed spray on lining out stock and also whether a liquid or granular application is being made. Certain sprays cannot be used on liners even when it is directed at the base of the plants without taking some chance of producing some injury The same chemical might be applied as a granular formulation without any injury.
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