Anhui Provincial Academy of Forestry

Hefei, China

Anhui Provincial Academy of Forestry

Hefei, China
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Li X.-J.,Anhui Provincial Academy of Forestry | Dong G.-P.,Anhui Provincial Academy of Forestry | Fang J.-M.,Anhui Provincial Academy of Forestry | Liu H.-J.,Anhui Provincial Academy of Forestry | Guo W.-L.,Anhui Provincial Academy of Forestry
Entomological Research | Year: 2017

Monochamus alternatus is a destructive stem-boring herbivore of Pinus massoniana, and the principal vector of pine wood nematode. To investigate the impacts of boring by M. alternatus larvae on the emission of volatile organic compounds (VOCs) from their host trees, the VOCs from uninfested and M. alternatus larvae infested P. massoniana trees were observed using a gas chromatograph–mass spectrometer. We detected 12, 9, 18 and 14 volatile organic compounds from infested xylem, infested phloem, uninfested xylem and uninfested phloem, respectively. In P. massoniana xylem, the boring of M. alternatus larvae induced cyclosativene, and inhibited 4-carene, humulene, styrene, α-phellandrene, β-myrcene, β-phellandrene and γ-terpinene. The relative amounts of camphene, copacamphene, longicyclene, longifolene, tricyclene and α-longipinene were significantly increased, and the relative amounts of α-pinene and β-pinene were significantly decreased by the boring behaviors of M. alternatus larvae. In P. massoniana phloem, the boring of M. alternatus larvae induced 2-bornanone, copacamphene, longicyclene and α-longipinene, and inhibited 2-carene, 4-carene, styrene, α-phellandrene, β-myrcene, β-phellandrene, β-pinene, γ-terpinene and ο-cymene. The relative amounts of camphene, caryophyllene and longifolene were significantly increased by the boring behaviors of M. alternatus larvae. The results indicate that the boring behaviors of M. alternatus larvae changed both the sorts and contents of the VOCs from P. massoniana trees. © 2017 The Entomological Society of Korea and John Wiley & Sons Australia, Ltd


Li X.-J.,Anhui Provincial Academy of Forestry | Dong G.-P.,Anhui Provincial Academy of Forestry | Yang L.,Anhui Provincial Academy of Forestry | Guo W.-L.,Anhui Provincial Academy of Forestry
Journal of Forestry Research | Year: 2015

Both fecundities and egg hatchabilities were compared among three populations of Dastarcushelophoroides Fairmaire adults (Coleoptera: Bothrideridae) fed on three types of artificial diets (Diet of formula 1 composed of silkworm pupa powder, dried yeast powder, sucrose, peptone, egg yolk powder and poplar branch powder. Diet of formula 2 composed of silkworm pupa powder, dried yeast powder, sucrose, egg yolk powder, poplar branch powder, cricket powder, benzoic acid and distilled water. Diet of formula 3 composed of pine bark powder and Monochamus alternatus larva powder). for 90 days. The three diets showed no significant difference regarding the average number of eggs deposited by all D. helophoroides females (16622.3–23874.7); the average number of eggs per female (1278.6–1836.5); and the average number of eggs per female per day (14.2–20.4). The number of eggs one cluster contained mainly (82.06–82.66 %) lied in 1–100 eggs, and the average number of eggs per cluster ranged from 61.7 to 63.1. In the first 10-day period, the number of eggs deposited by all females fed on formula 1 was significantly larger than that on formula 3. The eggs deposited in the last four 10-day periods were more than in the former five 10-day periods, on formula 3. There were no significant differences in hatchability of total eggs among the three artificial diets, and the average corrected egg hatchability ranged from 82.85 to 84.78 %. No significant differences in the adult mortality and mean weight gain of D. helophoroides were found after feeding on three artificial diets. Our results suggest that D. helophoroides adults were not specialized on the diet, and the diet types might have little effect on fecundity and egg hatchability in D. helophoroides, as long as sufficient nutrition was supplied. © 2015, Northeast Forestry University and Springer-Verlag Berlin Heidelberg.


Li X.-J.,Anhui Provincial Academy of Forestry | Dong G.-P.,Anhui Provincial Academy of Forestry | Fang J.-M.,Anhui Provincial Academy of Forestry | Liu H.-J.,Anhui Provincial Academy of Forestry | And 2 more authors.
Archives of Insect Biochemistry and Physiology | Year: 2015

Dastarcus helophoroides is an ectoparasitoid beetle of Monochamus alternatus, and the parasitism by D. helophoroides larvae remarkably influenced on the immune responses of M. alternatus larvae in many aspects. The hemolymph melanization reactions in the hosts were inhibited 1 h and 24 h postparasitization. The phenoloxidase activities of hemolymph were significantly stimulated 4 h postparasitization and inhibited 12 h postparasitization, and back to control level. The antibacterial activities of hemolymph in the parasitized hosts were significantly lower than that in the unparasitized ones 1 h postparasitization. By 72 h postparasitism, the total hemocyte numbers of the parasitized larvae declined to not more than one-seconds of the number collected from the unparasitized larvae. All sampled hemolymph held the capability of nodulation, and there were fluctuations in the number of nodules the hemocytes made. However, there were no significant differences between unparasitized and parasitized larvae at each time point in the hemagglutination activity and the ratios of spreading hemocytes. In conclusion, D. helophoroides larvae could regulate M. alternatus immune system and resulted in the changes in host immune responses. © 2015 Wiley Periodicals, Inc.

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