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| Publication Type:
| Report |
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| Author(s): | Heller, Paul R.;
Walker, Robert G. |
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| Author Affiliation: | Heller: Professor; Walker: Research Technologist, Entomology, Penn State University |
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| Title: | Spring management of Cooley spruce gall adelgid with insecticidal soap, highly refined horticultural spray oil, experimental and conventional insecticides on douglas fir in Lehighton, Pennsylvania, 1992 |
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| Section: | Insect control in turfgrass
Other records with the "Insect control in turfgrass" Section
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| Source: | Turfgrass Research Results. 1992, p. 77. |
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| Publishing Information: | [University Park, PA: Pennsylvania State University, College of Agricultural Sciences, Agronomy Dept., Entomology Dept., Horticulture Dept., Plant Pathology Dept.] |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Twelve treatments were applied to evaluate Cooley spruce gall adelgid on heavily infested 6-8 ft Douglas fir Christmas trees. Treatments were applied on 23 Apr and arranged in a randomized complete block design. Each treatment was replicated four times. Foliar treatments were completed by using a Solo Master 412 back pack mist blower operating at full throttle on setting two. Treatments were applied at the rate of 150 gal/A (454 ml/tree). At treatment time the following conditions existed: air temperature, 78° F; % relative humidity, 45.0; and skies were clear. Posttreatment counts were completed on 3 Aug. Each treatment was evaluated by selecting four cardinal locations on each tree at breast height, and counting 50 needles at each location and recording the number of Cooley spruce gall damaged needles. A total of 200 needles were examined per tree and converted to % damaged needles. An average of 54.9 immature Cooley spruce gall adelgids per 15 s counts were recorded prior to treatment on Apr 23. Results from posttreatment counts (3 Aug) indicated that seven treatments provided significant control. No phytotoxicity was noted." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Heller, P. R., and R. G. Walker. 1992. Spring management of Cooley spruce gall adelgid with insecticidal soap, highly refined horticultural spray oil, experimental and conventional insecticides on douglas fir in Lehighton, Pennsylvania, 1992. Turfgrass Research Results. p. 77. |
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