Results 261 to 270 of about 86,658 (309)
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Pear, Pear Psylla Control, 1987
Insecticide and Acaricide Tests, 1988Abstract Six-year-old pear trees were sprayed by handgun operating at 600 psi to evaluate pesticides for control of PP. Plots consisted of unreplicated blocks 2 rows wide containing 48 trees. The test orchard was sprayed on 6 Mar with Pydrin 2.4 EC, 1 pt/100 gal, and superior type oil, 1 gal/100 gal, to reduce density of overwintered ...
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Pear, Pear Psylla Control, 1979
Insecticide and Acaricide Tests, 1980Abstract Fifteen-yr-old Barlett pear trees were sprayed with handguns operating at 600 psi to evaluate candidate pesticides for control of pear psylla. Plots consisted of five 2-tree replications in randomized block design. Each plot was sprayed on May 1 and Jun 29.
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Pear, Pear Psylla Control, 1978
Insecticide and Acaricide Tests, 1979Abstract Experiments were conducted in a 1.5-acre planting of 6-yr-old ‘d-Anjou’ pear trees. Dilute sprays were applied to single-tree plots with a hand gun and hydraulic sprayer operating at 400 psi. Unsprayed trees were alternated with treated trees within rows. Experiment 1 (Table 1) consisted of 6 prebloom treatments, 5 of which were
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Pear, Pear Psylla Control, 1986
Insecticide and Acaricide Tests, 1987Abstract Twenty-year-old pear trees were sprayed with handguns operating at 600 psi to evaluate Avid for seasonal control of PP. Populations were monitored at 2-week intervals by adult and nymph counts. PP adults were counted by the limb tap method (25 taps/plot), PP nymphs and PRM from brushed leaf samples (56 leaves/plot).
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Pear, Pear Psylla Control, 1981
Insecticide and Acaricide Tests, 1982Abstract This test was conducted within a commercial orchard comprised of 9-year-old trees. Single-tree plots were arranged in a complete randomized block design with 5 replications. Treated trees were separated within rows by at least one unsprayed tree and adult psylla were available to repopulate test plots. Treatments were applied on
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Pears, Pear Psylla Control, 1977
Insecticide and Acaricide Tests, 1978Abstract Spurs bearing 10-15 psylla eggs were collected from mature Bartlett pear trees in April. In the laboratory each spur was dipped (in and out), 6 replicates each, in each of the insecticides listed and then fixed upright in a flask with the base of the spur immersed in water to keep the spur fresh.
J. F. Howell, R. E. Fye, T. J. Sevigny
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Insecticide and Acaricide Tests, 1984
Abstract Twenty-yr-old Anjou pear trees were sprayed with handgund operating at 600 lb/in2 to evaluate candidate pesticides for control of pear psylla. Plots consisted of five single-tree replicates in randomized block design. Pear psylla densities were estaimated by counts of adults and nymphs at about 2-week intervals.
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Abstract Twenty-yr-old Anjou pear trees were sprayed with handgund operating at 600 lb/in2 to evaluate candidate pesticides for control of pear psylla. Plots consisted of five single-tree replicates in randomized block design. Pear psylla densities were estaimated by counts of adults and nymphs at about 2-week intervals.
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