The hatchability of sheep gastrointestinal nematode eggs exposed to ultraviolet (UV) radiation and the activity of the hatched larvae were examined. Hatchability decreased with increasing exposure to radiation. The difference in hatchabilityof eggs irradiated for 15,30 and 60 minutes were highly significant (p < 0.01 dalpha = 3.07, 3.24 and 3.75) compared with the hatchability of the nonirradiated eggs. The life span of irradiated larvae was shortened, only 20% of those expose to UV radiation 60 minutes survive for 2 days as against 100% survival rate in the non-irradiated larvae. Batches of nematode larvae (L1) were irradiated with ultraviolet (UV) light for varying time interval to determine the influence of radiation on the transmission potential of the irradiated larvae. There was a decrease in the survival rate of the hatched free-swimming larvae that corresponded with the increasing radiation exposure time.
Animals ; Larva/growth&development/radiation effects ; Nematoda/*growth&development/*radiation effects ; *Ultraviolet Rays

To clear the effect of the wound to the growth of the larva of the host to the Ophiocordyceps sinensis, the wounds of same severity at the same position were made artificially to the larva and which were artificial fed at the same environment and condition. The results indicated that, over the winter, the survival rate of the wounded of the infection larva was lower than that of the healthy larva, but the weight had no significant difference between the wounded and the healthy larva. The survival rate of the wounded of the no infection larva was lower than that of the healthy larva, but except with black skin, the wounded larva with offwhite and dusty red had no influence on the variety of the weight. In summery, wound had no advantage to the survival rate, but had no influence to the weight. The result had provided theoretical basis to the reforming of the system of the artificial culture O. sinensis.
Animals ; Body Weight ; Breeding ; methods ; Hypocreales ; growth & development ; Larva ; Moths ; growth & development ; microbiology

UNLABELLEDTo culture silkworm Cordyceps cicadidae artificially.

METHODTwenty Paecilomyces cicadae were collected and isolated from 8 natural reserves in China and the Cheju Island of Korea. By the impregnation method, their infection to silkworm larvaes and silkworm chrysalises and the synneneta production were studied.

RESULTThe results showed that all P. cicadiae strains could infect silkworm larvaes and silkworm chrysalises, and some strains could produce synnenetas.

CONCLUSIONThe silkworm chrysalis was better than silkworm larvae to culture C. cicadidae.

Animals ; Bombyx ; growth & development ; microbiology ; Cordyceps ; growth & development ; Culture Techniques ; methods ; Larva ; microbiology

UNLABELLEDTo study the effects of the integrated pest control techniques on growth of host larvae of Cordyceps sinensis.

METHODThe integrated pest control techniques were compared with conventional techniques to evaluate the effects on growth of host larvae.

RESULT AND CONCLUSIONThe results showed that the techniques had broken the balance of the microbial living in the material, produced effective inhibition on the pests, raised the survival rate and promoted the growth of the host larvae at the same time.

Animals ; Cordyceps ; physiology ; Larva ; growth & development ; microbiology ; Moths ; growth & development ; microbiology ; Pest Control, Biological ; methods

OBJECTIVE: To study the growing of flies on body after different postmortem interval. METHODS: In natural environment, time points when flies coming, gathering, making eggs, and maggots pupating, emergencing were observed on a female body died of disease. RESULTS: The time when flies coming, gathering, making eggs, and maggots pupating, changing to chrysalis, and emergencing were 0.2, 28, 44, 60, 112 and 248 h after one's death, respectively. CONCLUSION This study may be used in PMI estimation.
Animals ; Diptera/growth & development* ; Female ; Humans ; Larva/growth & development* ; Ovum/growth & development* ; Postmortem Changes ; Pupa ; Temperature ; Time Factors

A case of furuncular myiasis was reported for the first time in a 29-year-old young Taiwanese traveler returning from an ecotourism in Peru. Furuncle-like lesions were observed on the top of his head and he complained of crawling sensations within his scalp. The invasive larva of botfly, Dermatobia hominis, was extruded from the furuncular lesion of the patient. Awareness of cutaneous myiasis for clinicians should be considered for a patient who has a furuncular lesion and has recently returned from a botfly-endemic area.
Adult ; Animals ; Diptera ; growth & development ; physiology ; Humans ; Larva ; physiology ; Male ; Myiasis ; diagnosis ; parasitology ; Taiwan ; Treatment Outcome

Bombyx mori bidensovirus (BmBDV) has been identified as causing chronic densonucleosis in Bombyx mori specifically. The replication mechanism of BmBDV remains unknown. Its genome comprises two single stands DNA (VD1 and VD2). In order to rescue infectious virions in vitro, we obtained the total viral DNA extracted from the BmBDV-infected larvae midguts, subsequently cloned the full-length sequence of BmBDV genome fragments by PCR and constructed recombinant plasmids pMD18T-VD1 and pUC-VD2. The linear genome fragments were obtained by digesting recombinant plasmids with corresponding restriction enzymes, and then collectively transfected BmN cells by the method of liposome-embedding. We determined the replication of the virus gene by PCR with the template of demethylated total DNA extracted from the post-transfect BmN cells. Meanwhile, we collected the total proteins from the post-transfect BmN cells and the larvae midgut of feeding the post-transfect BmN cells to perform Western blotting analysis, and detected the expression of viral genes. Here we firstly confirm that infectious virions can be rescued in BmN cells by linear co-transfect method.
Animals ; Bombyx ; DNA, Viral ; Densovirus ; growth & development ; Larva ; Transfection ; Virion ; Virus Cultivation

In order to explore the environmental pest management method of Dorysthenes hydropicus, three strains of entomopathogenic nematodes, viz. Heterorhabditis bacteriphora (H06), Steinernema scapterisci (SS), S. carpocapsae (All) were used on larvae of Dorysthenes hydropicus, with treatments of 0, 5 000 and 10 000 nematodes each larva. The result showed that these three strains viz. All, H06 and SS had high lethal effects on the larvae. Lethal rates had dose-effects relationship with inoculation amounts. High dose treatments resulted in high mortalities and led to quick death, especially in the treatment of H06. Treatment of H06 with 10 000 nematodes per larva resulted in 100% mortality after inoculated 4 days. Different strains of these nematodes had various lethal characters, H06 with only one peak mortality, the larvae died quickly after inoculated, while All and SS with 2 peak mortalities, there was a stable stage with low mortality between the 2 peak mortalities. Entomopathogenic nematodes could be used as a hopeful method for controlling of Dorysthenes hydropicus in fields.
Animals ; Larva ; parasitology ; Moths ; growth & development ; parasitology ; physiology ; Nematoda ; physiology ; Pest Control, Biological ; methods

This paper is in order to study the anti-feeding and growth inhibition activity of toatal ginsenoside of ginseng stems and leaves against 4th-instar Mythimna separata larvae. Simulating natural growing condition indoors, on the base, To study the anti-feeding and growth inhibition activity of toatal ginsenoside against 4th-instar M. separata larvae by leaf disc test. The toatal ginsenoside appeared to be of significant antifeeding activity against 4th-instar M. separata larvae. The 4th-instar M. separata larvae fed on the leaves of Sorghum bicolor treated with 20, 10, 5 g · L(-1) toatal ginsenoside. At 8 h, non-selective anti-feeding rate were 88.67%, 64.40% and 47.36%, and selective anti-feeding rate were 62.49% , 44.29% and 34.19%; Compared with the photographic, The toatal ginsenoside conld make the development period had prolonged 13h in treated group. The toatal ginsenoside had significant inhibition effect on feeding and growth and development against 4th-instar M. separata larvae, and inhibition effect increases as the increase of concentration ginsenoside.
Animals ; Ginsenosides ; pharmacology ; Insecticides ; pharmacology ; Larva ; Moths ; growth & development ; Panax ; chemistry

OBJECTIVE: In order to determine the major species of sarcosaphagous flies and their regular activity on carcass in Hohhot district. METHODS: Six rabbits were killed and placed outdoors at different time from July to October in Hohhot district. Some species of sarcosaphagous flies that appeared the cadavers were observed and identified. RESULTS: It showed that there are 10 main spieces belonging to 3 families and 8 genera were from Diptera, including Musa domestica domestica Linnaeus, Musa domestica vicina Maequart, Ophyra capensis (Wiedemann), Hydrotaea armipes (Fall.), Muscina stabulans (Fall.) from Museidae; Lucilia sericata (Meigen), Chrysomya megacephala (Fabricius), Lucilia cuprina (Wiedemann) from Calliphoridae; Boettcherisca peregrina (Robineau-Desvoiy), Parascarcophaga crassipalpis (Maequart) from Sacrophagidae. Besides, it showed obvious regulations that different species of sarcosaphagous flies appeared on carcass at different postmortem interval and the first part of carcass that sarcosaphagous flies appeared on. CONCLUSION It may be useful for estimating postmortem interval in Hohhot district.
Animals ; China ; Diptera/physiology* ; Larva/growth & development* ; Postmortem Changes ; Rabbits ; Seasons ; Species Specificity ; Time Factors