Abstract
Dioryctria auranticella (Grote), a coneworm that infests ponderosa pine, Pinus ponderosa Douglas ex P. Lawson and Lawson, and Austrian pine, P. nigra Arnold, in southeastern Nebraska is univoltine. Head capsule measurements indicate five instars. First instars apparently overwinter in hibernaculae. Second and third instars feed in male and female pine flowers during early May. Fourth and fifth instars tunnel in second-year cones for about 2-3 wk between mid-May and mid-June and often require two cones to complete development. Larvae pupate within cones during June, and adults are active from mid-June to late July. At26°C, eggs hatch in 6-9 d. Ichneumon brunneri Rohwer was the most abundant of eleven parasite species reared from cones damaged by D. auranticella .
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
