Control of Spider Mite on Peanuts in Alabama, 1990

• Published in: Insecticide and acaricide tests 1991-01, Vol.16 (1), p.212-212
• Main Authors: Weeks, James R., Wells, Larry W.
• Format: Article
• Language: English
• ISSN: 0276-3656
• DOI: 10.1093/iat/16.1.212

A field test on the Wiregrass Experiment Station evaluated materials for their ability to suppress or control spider mites compared with an untreated control. Treatments were applied on 28 Aug using a row crop sprayer calibrated to 15 gal/acre with 3, D2-25 nozzles/row. A second application was applied on 4 Sep to Danitol, Capture, Safer's Soap and Vydate plots due to hatching of new individuals and webbing in these plots. Temperatures during the study were in excess of 90°F each day with sunny skies and no rainfall. Plots consisted of 4/36-inch rows × 150 ft long. Three replicates of each treatment were arranged in a randomized complete block design. Sampling was conducted on 30 Aug, 4 Sep (before reapplication), 7 Sep and on 11 Sep by collecting 5 tetrafoliate leaves at random from each plot. These leaves were placed in plastic bags and chilled until counting in the laboratory later that day. In the laboratory 1 leaflet from each of the 5 leaves was selected at random and the adult spider mites on the upper and lower surface, and petiole of each leaflet were counted under a 30 × stereoscope. A visual observation rating of each plot was also made on 4 Sep and 12 Sep to evaluate the degree of damage to the plot as a whole (foliage damage) and the amount of webbing evident in the plant terminals.