The ultra_morphology and chemical composition of waxes secreted by the scale insect Physokermes shanxiensis (Homoptera: Coccidae) was researched with the techniques of scanning electron microscope (SEM), infrared abso...The ultra_morphology and chemical composition of waxes secreted by the scale insect Physokermes shanxiensis (Homoptera: Coccidae) was researched with the techniques of scanning electron microscope (SEM), infrared absorption spectra (IR) and gas chromatography/mass spectrometry (GC/MS). The result indicated that the scale insect secreted wet wax in its nymph stage. The wet wax coagulated into translucent wax covering on the body surface. However, the female adult secreted its wax secretion with white color and long thread form. According to the infrared absorption spectra characteristic of the waxes, it can be known that the both waxes either from male nymph or female adult were composed by a series of saturated and unsaturated long carbon chain compounds. But the two waxes have different in the chemical functional groups kind and numbers that composed the compounds, because of the differences in absorption peaks numbers and forms which appeared in the two infrared spectra from the wave number 1 800 cm -1 to 1 000 cm -1 . Through detected with GC/MS, 14 compounds with carbon atom number form C 13 to C 32 were obtained form the wax of the male scale insect. These compounds included 5 saturated higher fatty acids, 1 unsaturated higher fatty acid, 1 saturated higher fatty alcohol, 1 unsaturated higher fatty alcohol, 1 unsaturated ester, 1 saturated aldehyde, and 4 saturated alkane compounds.展开更多
Two soft scales, Kilifia deltoides De Lotto, 1965 and K. americana Ben-Dov, 1979 are recorded from Hainan, China for the first time. Detailed descriptions and illustrations of adult females are given. A key to the Chi...Two soft scales, Kilifia deltoides De Lotto, 1965 and K. americana Ben-Dov, 1979 are recorded from Hainan, China for the first time. Detailed descriptions and illustrations of adult females are given. A key to the Chinese species of adult females is provided. The specimens examined are deposited in the Entomological Museum of Northwest A ＆ F University, Yangling, Shaanxi, China （NWAFU）.展开更多
Coccophagus scutellaris (Dalman) is one of the specific parasitoids that attack soft scale insects in Egypt. In the present study, C. scutellaris was reared from 6 species of soft scale insects. These are Cero...Coccophagus scutellaris (Dalman) is one of the specific parasitoids that attack soft scale insects in Egypt. In the present study, C. scutellaris was reared from 6 species of soft scale insects. These are Ceroplastes floridensis Comstock, Coccus hesperidum L., Pulvinaria floccifera (Westwood), P. psidii Maskell, Saissetia coffeae (Walker) and S. oleae (Oliver).The abundance of C. scutellaris was monitored from July to Nov. 1999-2000 in five localities in Egypt, the Beni Suef, Cairo, Giza, Gharbiya and the Northern coast. C. scutellaris is considered an effective parasitoid of S. coffeae and S. oleae with maximum parasitism rates reaching 26% and 22% in Nov. and Aug. 1999, respectively.展开更多
A new species of scale inscct.Kilifia guizhouensis,from Guizhou,China, on myrsine semiserrata(Myrsinaceae),is described and illustrated.The differences between this species and the other know species of Kilifia are di...A new species of scale inscct.Kilifia guizhouensis,from Guizhou,China, on myrsine semiserrata(Myrsinaceae),is described and illustrated.The differences between this species and the other know species of Kilifia are discussed.展开更多
文摘The ultra_morphology and chemical composition of waxes secreted by the scale insect Physokermes shanxiensis (Homoptera: Coccidae) was researched with the techniques of scanning electron microscope (SEM), infrared absorption spectra (IR) and gas chromatography/mass spectrometry (GC/MS). The result indicated that the scale insect secreted wet wax in its nymph stage. The wet wax coagulated into translucent wax covering on the body surface. However, the female adult secreted its wax secretion with white color and long thread form. According to the infrared absorption spectra characteristic of the waxes, it can be known that the both waxes either from male nymph or female adult were composed by a series of saturated and unsaturated long carbon chain compounds. But the two waxes have different in the chemical functional groups kind and numbers that composed the compounds, because of the differences in absorption peaks numbers and forms which appeared in the two infrared spectra from the wave number 1 800 cm -1 to 1 000 cm -1 . Through detected with GC/MS, 14 compounds with carbon atom number form C 13 to C 32 were obtained form the wax of the male scale insect. These compounds included 5 saturated higher fatty acids, 1 unsaturated higher fatty acid, 1 saturated higher fatty alcohol, 1 unsaturated higher fatty alcohol, 1 unsaturated ester, 1 saturated aldehyde, and 4 saturated alkane compounds.
基金supported by the National Natural Science Foundation of China (30870324)
文摘Two soft scales, Kilifia deltoides De Lotto, 1965 and K. americana Ben-Dov, 1979 are recorded from Hainan, China for the first time. Detailed descriptions and illustrations of adult females are given. A key to the Chinese species of adult females is provided. The specimens examined are deposited in the Entomological Museum of Northwest A ＆ F University, Yangling, Shaanxi, China （NWAFU）.
文摘Coccophagus scutellaris (Dalman) is one of the specific parasitoids that attack soft scale insects in Egypt. In the present study, C. scutellaris was reared from 6 species of soft scale insects. These are Ceroplastes floridensis Comstock, Coccus hesperidum L., Pulvinaria floccifera (Westwood), P. psidii Maskell, Saissetia coffeae (Walker) and S. oleae (Oliver).The abundance of C. scutellaris was monitored from July to Nov. 1999-2000 in five localities in Egypt, the Beni Suef, Cairo, Giza, Gharbiya and the Northern coast. C. scutellaris is considered an effective parasitoid of S. coffeae and S. oleae with maximum parasitism rates reaching 26% and 22% in Nov. and Aug. 1999, respectively.
文摘A new species of scale inscct.Kilifia guizhouensis,from Guizhou,China, on myrsine semiserrata(Myrsinaceae),is described and illustrated.The differences between this species and the other know species of Kilifia are discussed.
