IMPLANTATION AND INJECTION OF SYSTEMICS TO SUPPRESS SEED AND CONE INSECTS IN DOUGLAS FIR IN MONTANA,
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AbstractThe systemic insecticides oxydemeton-methyl and acephate were injected at 10- and 15-cm spacings, and acephate and dimethoate were implanted at 10-cm spacing in Douglas fir, Pseudotsuga menziesii var. glauca (Beissn.) Franco, to improve seed yield. Nutrients were also injected at 15-cm spacing. All treatments except nutrients and dimethoate increased the yield of filled seeds when compared with the checks. The western spruce budworm, Choristoneura occidentalis Freeman, and spruce coneworm, Dioryctria reniculelloides Mutuura and Munroe, caused most of the damage to cones.
1988 ◽
Vol 3
(4)
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pp. 126-128
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1988 ◽
Vol 3
(2)
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pp. 44-46
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1978 ◽
Vol 110
(11)
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pp. 1127-1132
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1977 ◽
Vol 109
(9)
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pp. 1153-1158
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2009 ◽
Vol 91
(1-5)
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pp. 459-463
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