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    Efficacy of Insecticides Applied Ultra-Low Volume in Vegetable Oils

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    Increased use of vegetable oils as carriers for insecticide sprays has stimulated additional research related to the efficacy of aerial application of insecticides. The efficacy of insecticides applied as ultra-low-volume (ULV—2.34 L/ha [0.25 gal/acre]) vegetable oil sprays was compared with standard volume (SV—18.71 L/ha [2 gal/acre]) water sprays in field experiments involving a complex of cotton insect pests at several locations in Mississippi during 1981 to 1983. Results suggest that insecticides applied as ULV-vegetable oil and SV-water sprays are equally efficacious against cotton insect pests.

    Bioassay data and spray deposit characterizations were used to study more accurately differences in ULV-vegetable oil and SV-water sprays. Spray droplets associated with ULV-vegetable oil sprays tend to be smaller and deposited in a less dense pattern than those of SV-water sprays. Bioassay and residue analyses data indicate that ULV-vegetable oil and SV-water sprays deposit comparable amounts of active ingredient on the target area.


    insecticide, efficacy, vegetable oil, ultra-low-volume sprays

    Author Information:

    Luttrell, RG
    Mississippi State University, Mississippi State, MS

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP32861S