Publications by authors named "Guofei Fang"
Article Synopsis
- Pine wilt disease has significantly affected China, with research focusing on its long-term spread and the roles of host forests and wind in this process.
- The study found that from 1982 to 2019, affected areas in the Yangtze River Delta showed a trend of "steady increase-fluctuation-outbreak," with the host forest being the main factor in disease spread.
- Key factors influencing the transmission included host forest connectivity (31.8%), area share (28.7%), wind speed (22.6%), and wind frequency (8.8%), with simulations validating these results and emphasizing the need for effective prevention and control strategies.
In recent decades, ecological niche models (ENMs) have been widely used to predict suitable habitats for species. However, for invasive organisms, the prediction accuracy is unclear. In this study, we employed the most widely used maximum entropy (MaxEnt) model and ensemble model (EM) Biomod2 and verified the practical effectiveness of the ENM in predicting the distribution areas of invasive insects based on the true occurrence of in China.
View Article and Find Full Text PDFInvasive pathogen-insect symbioses have been extensively studied in many different ecological niches. Whether the damage of symbioses in different introduced regions might be influenced by other microorganisms has, however, received little attention. Eight years of field data showed that the varied levels of the nematode and beetle populations and infested trees of the invasive Bursaphelenchus xylophilus--Monochamus alternatus symbiosis were correlated with patterns in the isolation frequencies of ophiostomatoid fungi at six sites, while the laboratory experiments showed that the nematode produced greater numbers of offspring with a female-biased sex ratio and developed faster in the presence of one native symbiotic ophiostomatoid fungus, Sporothrix sp.
View Article and Find Full Text PDF[Responses of biological markers of larval Propsilocerus akamusi to phenol].
Ying Yong Sheng Tai Xue Bao
July 2011
Taking the 4th-instar larval Propsilocerus akamusi as test object, this paper studied the acute toxicity of phenol, and the body mass, pupation rate, protective enzyme activities, and detoxifying enzyme activities of the larvae under exposure to phenol. The LC50 value of phenol to the larvae after exposure for 6, 24, 48, 72, and 96 h was 222.52, 134.
View Article and Find Full Text PDFBackground: Intensification of world trade is responsible for an increase in the number of alien species introductions. Human-mediated dispersal promotes not only introductions but also expansion of the species distribution via long-distance dispersal. Thus, understanding the role of anthropogenic pathways in the spread of invading species has become one of the most important challenges nowadays.
View Article and Find Full Text PDF[Relationship between occurrence of Dryocosmus kuriphilus and development of cecidum].
Ying Yong Sheng Tai Xue Bao
January 2004
Article Synopsis
- Dryocosmus kuriphilus is a major pest affecting chestnut trees in China, leading to the formation of galls (cecidum) that compromise plant health.
- The quality and size of these galls vary under natural conditions, with their weight typically following a normal distribution pattern.
- Different chestnut varieties show varying levels of resistance to this pest, with Chushuhong being the most resistant, followed by Mifengqiu and Ershuizao, while Torymus sinensis Kamijo serves as the primary natural predator of the pest.