Abstract
Abstract The construction and operation of a portable light-weight spray boom and accompanying backpack are described. The sprayer can be used to apply pesticides accurately to experimental plots 3 or 4 m wide and is operated by two people. For lightness, both the main framework of the boom, to which the nozzles are attached, and the supporting struts are constructed of aluminium. The pesticide spray is supplied to the boom from a backpack consisting of a stainless steel tank (either 6 or 12 l capacity) and a high pressure gas cylinder. This sprayer has been found to be suitable for application of pesticides to plots larger than those normally treated with most small plot sprayers, but smaller than those requiring vehicle-mounted machines. An appendix lists the suppliers of the parts used and their cost.
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