Abstract
The jack-pine budworm, Choristoneura pinus Freeman, was observed feeding in an apparently normal manner on eastern larch. Observations in 1956 and 1957 indicated that large populations of the jack-pine budworm occurred on staminate-cone-producing red pine. The budworm defoliation caused top killing on red pine in all positions of the stand and it was shown that the dead portion of the crown was correlated with the length that was 80% or more defoliated. It was shown also that there was a correlation between the 1957 defoliation and the 1958 terminal growth on understory red pine. The 1957 terminal growth was not correlated with the 1957 defoliation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.