Batocera horsfieldi,a forestry pest,was an important stem-borer in *** Pest Risk Analysis(PRA) of *** was evaluated in order to providing more information to prevent the further spreading and intergreted control of th...
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Batocera horsfieldi,a forestry pest,was an important stem-borer in *** Pest Risk Analysis(PRA) of *** was evaluated in order to providing more information to prevent the further spreading and intergreted control of this *** to the methods of international PRA,the risk level of *** was estimated by qualitative and quantitative analysis,and its control countermeasure was *** results of qualitative analysis showed that *** had lots of hosts,and its wide distribution,high adaptability and the difficulty of eradication made the pest damages forestry production *** to the quantitative analysis,the PRA value of the pest was 2.04,showing that it was one of the high perilous forestry pests in *** and various control measures must be strengthened to prevent the spreading and damage of *** were given that *** would be controlled sustainably by releasing Dastarcus helophoroides,a natural enemy of ***,in damaged forests.
The volatile compositions of Chinese Pine (Pinus tabulaeformis) are analyzed. The main turpentine volatiles are (R)-(+)-α-pinene, (S)-(-)-β-pinene, (S)-(+)-3-carene (the largest) which occupy more than 97% of the to...
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The volatile compositions of Chinese Pine (Pinus tabulaeformis) are analyzed. The main turpentine volatiles are (R)-(+)-α-pinene, (S)-(-)-β-pinene, (S)-(+)-3-carene (the largest) which occupy more than 97% of the total. There are also myrcene, (+)-limonene, camphene, terpinen and phellandrene. In the experiment of Electroantennograms(EAG), the male of red turpentine beetles are sensitive to (S)-(-)-α-pinene、limonene and (S)-(+)-3-carene; while the female of the red turpentine beetles are sensitive to (S)-(+)-3-carene、limonene、(S)-(-)-α-pinene and myrcene. The female are more sensitive to the volatiles than the male. There is much difference in response of Dendroctonus valens in Chinese pine compared to that in USA in ponderosa pine. The volatile difference of the two pine species and the environment condition may contribute to this change. Further study on the mechanism of the change is needed.
There are many reports about resistance of transgenic Bt poplars to lepidopteran defoliators. Whether the poplars can resist haustellate mouth part pests and leaf-miners remains unclear. This study chose transgenic Bt...
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There are many reports about resistance of transgenic Bt poplars to lepidopteran defoliators. Whether the poplars can resist haustellate mouth part pests and leaf-miners remains unclear. This study chose transgenic Bt poplar, Populus euramericana cv. Robusta’(R-94), as the material to investigate its resistance to a haustellate mouth part pest, Hegesidemus habrus, and two leaf-miner species, Leucoptera susinella (Lepidoptera: Lyonetiidae) and Lithocolletis paslorella (Lepidoptera: Gracillariidae) in both field and laboratory. Results showed that R-94 poplar had strong resistance to H. habrus in fields. Injury rates of R-94 leaves were respectively only 1.08% in pure stands and 1.1% in mixed stands respectively, while injury rate of 107 poplar (a non-transgenic variety) was 16.3% in the mixed stands. When H. habrus was fed with R-94 leaves in laboratory, the livability of nymphae was 19.9% after 7 days of feeding. However, the livability of nymphae reached to 56.8% after 7 days of feeding with leaves of 107 poplars. When H. habrus was fed with R-94 and 107 poplar leaves together, the insects significantly preferred 107 poplar leaves to R-94 poplar ones. Besides H. habrus, R-94 poplar also showed strong resistance to two leaf-miners species. Therefore, R-94 poplar not only has strong resistance to lepidopteran pest, but also has similar resistance to haustellate mouth part pests and leaf-miners.
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