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Li J.,Guangdong Entomological Institute | Guo Q.,Shenzhen Wild Animal and Plant Protection Management Office | Han S.,Guangdong Entomological Institute | Jiang L.,Shenzhen Wild Animal and Plant Protection Management Office | Liang G.,South China Agricultural University
Florida Entomologist | Year: 2013

To uncover the relationship between chemical receptors and behaviors of the erythrina gall wasp (EGW), Quadrastichus erythrinae Kim (Hymenptera: Eulophidae), and to elucidate the chemical connections between the parasite and the host plant, the present study focused on determining the types, morphologies and distributions of the various antennal sensilla of adult EGW. With scanning electron microscopy and 3-dimensional microscopy, we found that the antennae of EGW adults have 6 kinds of sensilla, namely, sensory pore sensilla, chaetica sensilla, multiporous plate sensilla, trichoid sensilla, basiconic capitate peg sensilla and uniporous trichoid sensilla. Both the male and female wasps have these 6 kinds of sensilla. However the types and numbers of sensilla on the funicle and clava differed between males and females, but such a difference was not seen on the scape and pedicel between the 2 sexual genders. We found one kind of sensillum located on the end of pedicel of Q. erythrinae Kim that has not been described previously. The results of our research may aid use of EGW in the biological control of undesirable Erythrina spp. trees.

Lin M.-F.,Guangdong Entomological Institute | Lin M.-F.,Guangdong Public Laboratory of Wild Animal Conservation and Utilization | Lin M.-F.,Guangdong Key Laboratory of Integrated Pest Management in Agriculture | Guo Q.,Shenzhen Wild Animal and Plant Protection Management Office | And 13 more authors.
Chinese Journal of Ecology | Year: 2016

Solenopsis invicta is one of the most devastative invasive pests. In order to clarify the correlation between the numbers of different S. invicta instars on nest surface layer and ant mound size, 180 nests from six sites in Panyu, Guangzhou were investigated by digging method. The results demonstrated that in terms of mound volume, 57.78% of the nests were less than 5000 cm3, 20.56% between 5000 and 10000 cm3, and 21.67% greater than 10000 cm3. In terms of mound surface layer base area, 32.78% of the nests were less than 500 cm2, 42.78% between 500 and 1000 cm2, 24.44% and greater than 1000 cm2. For an area of 1 cm2 mound layer base and a volume of 1 cm3 mound, there were 3 and 22 ants, respectively. The number of each instar and total population increased with the increase of mound volume and mound surface base area. The positive correlations of the number of worker ants with the mound volume and the mound surface layer base area were more obvious than that of any other instars of S. invicta. The correlation of the amount of S. invicta with the mound volume was better than that with the mound surface layer base area. © 2016, editorial Board of Chinese Journal of Ecology. All rights Reserved.

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