Western pine tip moth reduced in ponderosa pine shelterbelts by systemic insecticides
David R. Van Haverberke, Robert E. Roselle, Gary D. Sexson, Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1971 - Nature - 7 pages
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0.166 percent active 22 percent 60 trees active ingredient application of dimethoate Applications of granular applied to 60 Boyd cations Check and dimethoate-treated check trees dimethoate spray dimethoate-sprayed trees dimethoate-treated and check dimethoate-treated trees drip-line eastern redcedar effective control Evaluation found phorate grams active grams phorate groups of trees Height Growth Infestation Data infestation in Row infested lateral tips July larvae larval stages LATERAL BRANCH INFESTATION lateral branch tips loblolly pine seed ments number October one-half growing seasons percent granular phorate percent in Row percent infestation Percent terminal Percentage of infested phorate and disulfoton phorate granules phorate Thimet 15G phorate treatment phorate-treated trees phosphorodithioate pine seed orchard pine tip moth PONDEROSA PINE ROW PONDEROSA-EASTERN REDCEDAR ROW rates of phorate shelterbelts spring application study trees systemic insecticides terbelt terminal and lateral Terminal Infestation tion tipi tips per tree trade name treated trees tree fig Trees averaged trees in Row untreated check