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

Dieter Foque, David Nuyttens

    Research output: Contribution to journalA1: Web of Science-articlepeer-review

    Abstract

    BACKGROUND: Fewer plant protection products are now authorised for use in ornamental growings. Frequent spraying with the same product or a suboptimal technique can lead to resistance in pests and diseases. Better application techniques could improve the sustainable use of the plant protection products still available. Spray boom systems - instead of the still predominantly used spray guns - might improve crop protection management in greenhouses considerably. The effect of nozzle type, spray pressure and spray angle on spray deposition and coverage in ivy pot plants was studied, with a focus on crop penetration and spraying the bottom side of the leaves in this dense crop.
    RESULTS: The experiments showed a significant and important effect of collector position on deposition and coverage in the plant. Although spray deposition and coverage on the bottom side of the leaves are generally low, they could be improved 3.0-4.9-fold using the appropriate application technique. CONCLUSIONS: When using a spray boom in a dense crop, the nozzle choice, spray pressure and spray angle should be well considered. The hollow-cone, the air-inclusion flat-fan and the standard flat-fan nozzle with an inclined spray angle performed best because of the effect of swirling droplets, droplets with a high momentum and droplet direction respectively.
    Original languageEnglish
    JournalPest Management Science
    Volume67
    Issue number2
    Pages (from-to)199-208
    Number of pages10
    DOIs
    Publication statusPublished - 2011

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