Apple, Campylomma Insecticide Test, 1992

The test was conducted in a 12-year-old ‘Delicious’ orchard at the Tree Fruit Research and Extension Center. The experimental design was randomized complete block with ten treatments each with four single-tree replicates. Treatments were applied to the point of drip with a handgun sprayer operated at 240 psi and the rate of 400 gal/acre. Nymphs were sampled by jarring MPB on to a 45 cm x 45 cm black cloth tray. One limb per tree (one tap per limb) was sampled on each date. Fruit evaluation was conducted before hand thinning in Jun and before fruit harvest. Forty apples per tree (or every apple on trees with less than 40 apples) were examined at both evaluations. Apples with one or more stings were considered culls.