SPRAY APPLICATION PLAYS A DETERMINING ROLE IN PERFORMANCE OF SYSTEMIC COMPOUNDS APPLIED TO THE FOLIAGE OF FRUIT PLANTS

TL;DRAbstract

Spray application factors are discussed relative to effective delivery of foliar applied nutrients to fruit trees. The application process can be viewed as a series of complex interdependent events, including: formulation of the active ingredient; atomization of the spray liquid; transport of the spray cloud to the tree; spray droplet impaction; retention; and residue formation and penetration of the nutrient. Any significant change in one event has profound effects on others, and each may be affected by application parameters, plant factors and environmental conditions. Only limited data have been generated specifically on effects of application parameters on performance of nutrient sprays. Thus, we have drawn heavily on studies of application of aqueous solutions of pesticides. Nutrient sources are not extensively formulated, but since nutrients are commonly incorporated in programmed pesticide applications, the spray additives (mostly adjuvants) used in the pesticide sprays will imp

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