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    Author(s): Kenneth N. Boe
    Date: 1971
    Source: Res. Note PSW-RN-233. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (1.04 MB)

    Description

    The knobcone X Monterey pine hybrid (Pinus attenuata Lemm. X P. radiata D. Don) has been outplanted in many places in California, among them the Redwood Experimental Forest and vicinity in north coastal California. Survival and growth in the early years were satisfactory. In 1966, red band needle blight was found to be infecting the plantations. Many of the trees have died. It appears that most of the trees on the best site will die from the needle blight. But one hybrid plantation so far shows no evidence of infection. It lies on a site four times higher in elevation and farther inland, where presumably there is less summer fog. The results suggest that small differences in climate may be the key factor in limiting needle blight infection.

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    Citation

    Boe, Kenneth N. 1971. Damaged to knobcone x monterey pine hybrids and parents ... by red band needle blight in California redwood sites. Res. Note PSW-RN-233. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p

    Keywords

    Pinus X attenuradiata, hybrid trials, plantation establishment, leaf blight, Scirrhia pini, Pinus attenuata, Pinus radiata, Redwood Experimental Forest

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