Pear, Agri-Mek Timing Evaluation, 1991

The study was conducted in a 0.5 hectare block of alternating 4 row sets of‘Bartlett’ and ‘Anjou’ pear trees. The block was divided into 3 treatments, replicated twice in a randomized block design. The three treatments were different timings of Agri-Med and oil applications: petal fall (PF) on 2 May, 1st cover (FC) on 24 May, and 2nd cover (SC) on 22 Jun. Applications were made using a commercial air-carrier sprayer set to deliver 1870.6 liters/ha. Agri-Med was applied at each timing at the rate of 1462 ml/ha plus 0.25% (4.7 liters/ha) Orchex 796 horticultural spray oil. Additional insecticide sprays applied to the entire orchard during the trial were Guthion 35 WP 3.9 kg/ha applied 28 May, 3 Jul, and 31 Jul. Densities of the TSSM and PP were estimated by randomly selecting 20 mature and 20 younger leaves from each variety biweekly, brushing the samples and recording the stages and numbers of each species with the aid of a dissecting microscope.