Open AccessApple, Full Season Insecticide Evaluations, 1987
Author(s) -
R. L. Horsburgh,
L. J. Cobb
Publication year - 1988
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/13.1.9
Subject(s) - sprayer , codling moth , replicate , horticulture , randomized block design , malus , tortricidae , apple tree , toxicology , biology , mathematics , environmental science , agronomy , pest analysis , botany , statistics , lepidoptera genitalia
Insecticide treatments were applied in a comparative test to mature trees on 21 Apr; 13 and 27 May; 16 Jun; 6 and 27 Jul; and 11 Aug. Treatments were applied with a Bean 35 gal/min hydraulic sprayer operating at 400 psi. Single tree treatments were replicated 4 times in a randomized block design. Trees were sprayed to runoff. All trees were sprayed with Lorsban 4E 2.5 pt/A on Apr 8 before the test began. Insect damage was evaluated on 24 Aug by randomly selecting and checking 50 apples/replicate. Only codling moth and redbanded leafroller damage could be analyzed. Other damage is included on the chart and the total damage from all insects is shown. Average finish ratings were evaluated for each treatment by grading each apple in a 100-apple sample on a scale of 1 to 5 (1 being the best).
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