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Sex Pheromone Application On Tea Tussock Moth, Euprocti Spseudoconspersa (Strand) And New Non-pollution Control Technique System For Insect Pest Of Tea Garden

Posted on:2005-07-11Degree:MasterType:Thesis
Country:ChinaCandidate:Y M WangFull Text:PDF
GTID:2133360122494677Subject:Agricultural Entomology and Pest Control
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The tea tussock moth, Euprocti spseudoconspersa (Strand) (Lepidoptera: Lymantridae) is one of the major pest insects in tea plantation of China. A series of environmental and economic problems have risen because chemical pesticide has been using in controlling this pest insect for a long time. It is necessary for research on implementation of rational biological control to reduce the pollution of pesticides.The adult behavior of tea tussock moth were observed in 2002-2003. In nature, the ratio of female adult to male adult was 1:1.40. The eclosion duration of male adult was 1.48 days longer than that of the female adult. The eclosion peak of overwintering generation and first generation of tea tussock moth was in middle June and later September , respectively; The eclosion mainly occurred from 12:00 to 17:00 in a day. The adult mating can continue 7.98 hour in average. Two fastigiums of mating, from 6:00 to 8:00 and from 16:00 to 20:00, were observed in a daylight. The average number of eggs per female adult was 196.47. About 26.92% males have ability to mate second time, but no male was observed to mate third times or more. Adults can live 4 to 5 day, which depends on having mated or not. The longest distance of spread of male moths was about 100 meters in their lifetime, while pregnant female moths can spread 150 meter by far.Various facts can influence the effectiveness of traps with synthetic pheromones (10Me14Me-15:iBu, 14Me-15:iBu and 10Me14Me-15:nBu). The type B of synthetic sex pheromone could attract more moths than that of the type A and type C. More moths can be caught in the traps hanged about 90 cm high and with about 24 cm in diameter and by the dosage of 1.5mg of synthetic sex pheromone. Red and white traps could attract significantly more moths than other color traps did. The effectiveness of pheromone traps was relative to the wind direction. Those traps against wind direction attracted more moths than those of the opposite direction. In rain night there were still a lot of male moths were caught in pheromone traps.The synthetic sex pheromone ( 10, 14-dimethylpentadecyl isobutyrate ) of tea tussock moth, Euproctispseudoconspersa was tested by mass trapping for controlling tea tussock moth in 20 and 23 hectares of tea garden of Guizhou province during 2002 and 2003. 17 683 males and 23 679 males of tea tussock moth were caught by synthetic sex pheromone sex pheromone in 2002 and in 2003, respectively. Rates of the female mating in the mass-trapping areas were 29.24-47.26% lower than that of check areas during test period. The numbers of eggs and larvae of tea tussock from the first generation moth and from the overwintering generation were decreased 50-51.92% and 53.39-66.61% in control tea plantation by mass trapping compared with check tea plantation for 2 years, respectively.Furthermore, two kinds of biological pesticide were tested. Result showed that malrine cancontrol Empoasca vitis (Gothe) about ten days and the highest motilities was 73.54%. Bacillus thuringiensis used when tea tussock moth was in low stadium achieved mortalities 80.2%, while the mortalities decreased to 37.8%. When Bacillus thuringiensis's effectiveness were tested in Cnidocampa flarescens (Walker) we got the seam tendency, the two mortalities were 65.05% and 41.26%. After implementation of insect sex pheromone and biological pesticide in controlling pest insect of tea garden, community diversity index of nature enemies was significantly higher than chemical control and nature tea garden and community evenness of pest insect also rose. A new non-pollution control technique system which consisted of sex pheromone and biological pesticide for insect pest of tea garden have been established. Ecological , economic and society benefits have gained obviously after setting this system.To our knowledge, this study provides the first empirical evidence to observe thoroughly observed the adult behavior of tea tussock moth and to use synthetic sex pheromone or controlling tea tussock moth by mass trapping. Our results sug...
Keywords/Search Tags:Tea Garden, Euprocti spseudoconspersa (Strand), Sex pheromone Biological Agent, Non-pollution Control
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