Foliar and nontarget deposition from conventional and reduced-volume pesticide application in greenhouses

Effects of nozzle type and spray angle on spray deposition in ivy pot plants

“…Owing to the decreasing availability of authorised plant protection products, adequate pest control becomes more difficult in many ornamental crops, and almost no information is available about the optimisation of spray application techniques in horizontal ornamental crops. Gilles25 showed that an electrostatic reduced‐volume application of permethrin insecticide to greenhouse‐grown chrysanthemums resulted in significantly higher spray deposition compared with conventional high‐volume application. However, this technique also resulted in significantly higher contamination of non‐target surfaces of the greenhouse bench tops and aisle ways.…”

Electrostatically charged sprays

“…Captured charge on plastic film was also exploited by Anantheswaran and Law (1981) as the basis for a self-charging wind-shield for electrostatic spraying (∼ −5 mC/kg) of planar turfgrass crops having very little canopy depth, to achieve 4.5-fold increase in target deposition versus uncharged spray. In comparison with foliar deposition of permethrin insecticide onto chrysanthemum plants in commercial glasshouses using conventional hydraulic spray (2300 L/ha), Giles et al (1992) further confirmed that air-assisted, induction-charged spray (−6 mC/kg, 46 L/ha) provided significantly greater 3.7-fold dose transfer to foliage as well as the persistence of that foliar residue for plant protection, again confirming economic pest control while reducing by over 50% the amount of active ingredient dispensed into the environment. Similarly, in air-assisted inductioncharged spray application of the commercial biofungicide Bacillus subtilis onto the ∼700 μm diameter stigmatic surface of blueberry flowers for control of the plant disease Monilinia vaccinii-corymbosi, electrostatic focusing of the charged spray (−7.8 mC/kg, 56 L/ha) delivered 4.5 times more viable colonyforming units (i.e.…”

Electrostatic Spraying of Potassium Sorbate for the Reduction of Yeast and Molds on Cakes

“…For example, ES has been used to apply captan (a fungicide) to commercial strawberry plants (Giles and Blewett ), permethrin (an insecticide) to greenhouse‐grown chrysanthemums (Giles et al . ), pesticides into cotton canopies (Dai et al . ), TalstarOne (an insecticide) to bushes (Snell and Weiner ) and antifungal agents ( B. subtilis ) to blueberry flowers (Law and Scherm ).…”