. Cooperative economic insect report. Beneficial insects; Insect pests. - 193 - PEAR PSYLLA (Psylla pyricola) increased rapidly during May and June in central WASHINGTON, encouraged by early season control failures and favorable weather. The pest was greatly reduced in the Yakima area of Yakima County by high temper- atures in July and control chemicals. Resistance, which appeared in 1961 to the latest phosphate control material, became a serious problem in 1962. Populations of pear psylla were low throughout the season in western Washington. Control of the psylla in Jackson County, OREGON, wa
. Cooperative economic insect report. Beneficial insects; Insect pests. - 193 - PEAR PSYLLA (Psylla pyricola) increased rapidly during May and June in central WASHINGTON, encouraged by early season control failures and favorable weather. The pest was greatly reduced in the Yakima area of Yakima County by high temper- atures in July and control chemicals. Resistance, which appeared in 1961 to the latest phosphate control material, became a serious problem in 1962. Populations of pear psylla were low throughout the season in western Washington. Control of the psylla in Jackson County, OREGON, was excellent. Only a few negligent growers were bothered by this pest in the Hood River or the Willamette Valley in 1962. Population levels of pear psylla in IDAHO were apparently below those recorded during the past few years, particularly in the Moscow-Lewiston area of Latah and Nez Perce Counties. In CALIFORNIA, several counties not previously recorded as having pear psylla were added in 1962. The counties reported were Alpine, Butte, Glenn, Kern, Mono, San Diego, Tuolumne and Ventura. This insect probably received more attention in 1962 than in previous years in California since it is suspected of being a vector of pear decline. Pear psylla was abundant in home orchards in CONNECTICUT during 1962, and nymphs were common on neglected trees June 26 and August 2 in RHODE Distribution of Pear Psylla APPLE TWIG BORER (Amphicerus bicaudatus) damaged apple trees in Baylor County, TEXAS; and FLATHEADED APPLE TREE BORER (Chrysobothris femorata) killed about 30 percent of the trees in a young apple orchard near Belen, Valencia County, NEW MEXICO. Larval counts in the latter case were often as high as 5 per tree. FULLER ROSE BEETLE (Pantomorus godmani) was reported light on apple trees in Humboldt County, CALIFORNIA. PLUM CURCULIO (Conotrachelus nenuphar) was about normal for the year in NEW YORK and MAINE, somewhat less troublesome in NEW HAMPSHIRE, but it was the number two
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