Dissertation
Developing an IPM program to control the carpenterworm moth and poplar-and-willow borer in irrigated hybrid poplars
Washington State University
Doctor of Philosophy (PhD), Washington State University
12/2006
DOI:
https://doi.org/10.7273/000005590
Abstract
Hybrid poplars (Populus spp.) are grown world wide for a variety of uses. In the interior Pacific Northwest they are grown as short rotation woody crops for high-grade wood fiber for the pulp and paper industry or non-structural sawtimber. Given the premiums that can be garnered when poplars are grown for non-structural sawtimber as well as some of the pest management limitations that occur when trees are grown under the guidelines of the Forest Stewardship Council certification, finding low cost and highly effective pest management strategies becomes an imperative. The research reported within this dissertation contributes toward this goal.; In the introduction, I outline both the context of poplars within a short rotation woody crop system and note the major pests found in irrigated poplars in the interior Pacific Northwest. These pests are categorized by feeding damage (i.e. defoliators and wood borers) and for each pest I briefly outline their importance, biology, monitoring methods, and current control tactics. Of the various major pests within the poplar system, I primarily focused on two: The poplar-and-willow borer, Cryptorhynchus lapathi (L.) (Coleoptera: Curculionidae) and the carpenterworm moth, Prionoxystus robiniae (Peck) (Lepidoptera: Cossidae).; In chapter one, I report on a study aimed at assessing the variability in C. lapathi to clone preference. Results indicated that C. lapathi were significantly more successful at establishing a population in two clones with Populus trichocarpa x P. deltoides (TxD) parentage (? x ?) than in either the two clones with P. deltoides x P. nigra (DxN) parentage (? x ?), or a single clone of P. deltoides x P. maximowiczii (DxM) parentage (? x ?). In chapter two, I report on a study that comprised several laboratory experiments with the objective of elucidating the effect of temperature on P. robiniae development. In chapter three, I evaluate two degree-day (DD) calculating methods to determine their relative accuracy at predicting biofix of male P. robiniae in irrigated poplar plantations in the interior Pacific Northwest. Additionally, I discuss an expanded survey at 29 locations across North America that indicated the predictive biofix value did not work outside the interior Pacific Northwest.
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Details
- Title
- Developing an IPM program to control the carpenterworm moth and poplar-and-willow borer in irrigated hybrid poplars
- Creators
- Eugene R. Hannon
- Contributors
- John J. Brown (Chair)
- Awarding Institution
- Washington State University
- Academic Unit
- Department of Entomology
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 192
- Identifiers
- 99901054531701842
- Language
- English
- Resource Type
- Dissertation