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- Title
Patterns of Kunyushan Web-spinning Sawfly Occurrence in Four Types of Japanese Red Pine Forest Stands: Implications for Ecological Control of a Specialist Herbivore.
- Authors
Sun, Z. Q.; Liang, J.; Zhang, X. Y.
- Abstract
We analyzed Japanese red pine (JRP) stand dynamics over 13 years of growth (1996 -2008) and the effects of stand conditions on Cephalcia kunyushanica occurrence, to test the feasibility of ecological control of herbivore in Kunyushan National Forest Reserve, China. Changes in stand characteristics implied that local stands have entered the stem exclusion stage. Mean larval densities differed significantly among four types of JRP stands, ranging from pure stands to mixture with secondary host or non-host species. Stand density was the most important factor to influence sawflies occurrence. Severe sawfly attack accelerated stand density adjustment. The "stand density trigger hypothesis" applies well to explain insect outbreaks closely associated with the stem exclusion stage, since sawfly occurrence was not necessarily severe in resource-concentrated areas. Our results suggest that control of sawfly through ecological approaches, such as by avoiding large area pure JRP stand or stands mixed with secondary host, or by adjusting JRP stand density, are feasible.
- Subjects
JAPAN; SAWFLIES; JAPANESE red pine; FORESTS &; forestry; FOREST ecology; HERBIVORES; PLANT growth
- Publication
Egyptian Journal of Biological Pest Control, 2015, Vol 25, Issue 2, p305
- ISSN
1110-1768
- Publication type
Article