The density of the pine caterpillar (number per 1000 cm 2 branch) was 7.9 on 8 May 1998, and subsequently decreased to 0.5 on 14 March 1999, showing a decreasing trend of caterpillar density.
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Modeling Pine Caterpillar, <i>Dendrolimus spectabilis</i> (Lepidoptera: Lasiocampidae), Population Dynamics with a Stage-Structured Matrix Model Based on Field Observations.
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