Acta Entomologica Sinica (2004) 47, 624-629

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Xiao-Sui Wen, Yuan-Yu Kuang, Ming-Qing Shi, Yong-Song Luo, Rong-Lin Deng and Jiang-Hua Sun (2004)
[Life history, oviposition and feeding behavior of Hylobitelus xiaoi Zhang (Coleoptera : Curculionidae)]
Acta Entomologica Sinica 47 (5), 624-629
Abstract: Hylobitelus xiaoi Zhang is a new outbreak pest attacking exotic pines with larvae feeding on the inner bark of both lower parts of tree trunks and root collar area. This species required two years to complete one generation in southern Jiangxi, with overwintering by adults in pupal chambers and soil and by larvae in galleries in the bark of host trees. The thermal threshold for development was 8.4°C for egg and 7.5°C for pupa. The thermal sum for development was 215.9 degree-days for eggs and 345.3 degree-days for pupa. Between 13-28°C , the developmental duration was 52.9 - 11.4 days for the egg stage, 60.1 - 16.4 days for the pupal stage between 13 - 30°C . Larval development lasted for 128.9 days at a temperature of 25°C. Adult flight ability was very limited and the insect mainly moved by walking. It became active at night, climbing up trees around sunset and returning to the tree base in the following morning. Adults fed on the inner bark of host branches. Average feeding lasted about 46.3 days before reaching reproductive maturity. The oviposition period was 105.3 days. The eggs were deposited in the outer bark of the stem near the ground. The average fecundity per female was 35.7 eggs. There were five to seven larval instars. Young pine plantations, especially slash pine, were very susceptible to larval attack.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Jiang-Hua Sun

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Hylobitelus xiaoi Pine (Pinus) China (south)