Apple, Efficacy of an Experimental Miticide, 1992

Three rates of an experimental miticide were evaluated for control of an ERM and TSM on six year old ‘Empire’ apple trees on MM 111 rootstock. Comparisons were made with Omite 6E as a standard and a water control. Test trees were planted_20‘J6.1_meters) apart in the row and the rows were 24’ (2.32) apart. Data on other phytophagous mites, predatory mites and insects were also collected. Sprays were appliedwith a truck mounted airblast sprayer with the top nozzles shut off because of the small tree size 6 ft high (1.83 meters). A randomized block design was used in this five treatment, four replicate experiment. Each plot tree was separated from the next plot tree in a row by an unsprayed guard tree. Guard rows were also unsprayed. Data were collected by counting mites and eggs on 20-leaf samples per tree (following the Henderson-McBurnie procedure) from each single tree replicate. All treatments were applied 5 Aug 1992. Two and a half gal (9.46 liters) was also applied to each test tree.