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A Research On Biological Characteristics And Occurrence Regularity Of Anomala Corpulenta Motschulsky In Blueberry Orchard

Posted on:2012-02-29Degree:MasterType:Thesis
Country:ChinaCandidate:H HuangFull Text:PDF
GTID:2143330332984570Subject:Zoology
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In recent years, as large-scale industrial planted of blueberry, Anomala corpulenta Motschulsky had been a severe boring pest of blueberry orchard. From 2009 to 2010, this article have studied systematically the morphic character, habitus, life history, threshold temperature, effective accumulative temperature, population dynamics, sampling technique and the impact of temperature on the growth and development by room and field experiments. The results were as follows:1. Biological charactersThis insect occurs only one generation in one year and 3rd larvae over-wintered in the soil. Next year,3rd larvae moved to plow layer and began to damage in the April. In the May,3rd larvae became to pupa firstly. The pupation was to peak in late May to mid June. The Pre-pupa was twelve days. The pupa was about nine days. Adults appeared by the end of the May and the most serious hazards period of the year is June and July, In the late August and early September, the adults were disappeared. Late June to late July was the peak of oviposit. The pre-reproductive period was twelve days. And the reproductive period was about twenty-eight days. The July was the peak of incubate. Larval drilled in the soil that the depth from 40 to 70 cm in order to live through the winter.Added different leaves to Anomala corpulenta Motschulsky found:Anomala corpulenta Motschulsky taken very little castor. Adult s life was very short. The female couldn t spawn and propagate offspring. The adults, which were fed on soybean and blueberry, had longer life and higher spawning rate than fed on castor and poplar.2. Ecological characters(1) Field distribution pattern:Processed the experimental data and found that the probability (P) of neyman and the negative binomial distribution was more than 5%. This showed that the theoretical value from the two theories hadn t has significant difference from the actual number. So the two distributions were appropriated.(2) Sampling technique:Compared the various sampling methods found that checkerboard sampling method was most suitable for used in the blueberry orchard. When each sampling took one square meter, not only saved time and effort, but also improved the efficiency.(3) Effective accumulative temperature:In rage of 19~31℃, the growth of Anomala corpulenta Motschulsky went up with the rising of temperature. The relationship between growth speed and temperature accords to linear model and logistic model. The result showed that threshold temperature of egg, the first larvae, the second larvae, the third larvae, larval stage, pupa, adult and the yearly generation were: 11.9330±0.6082℃,10.0959±0.6362℃,10.1182±0.6267℃,4.1073±0.5631℃, 4.5031±0.5170℃,10.4223±0.2259℃,9.1801±0.7346℃,6.9598±0.5351℃respectively. And the effective accumulated temperature were:140.8419±5.1885, 385.0107±15.4981,400.6528±91.3068,3283.0440±112.8390,4281.0170±14.7737, 172.3876±2.3446,570.8104±24.6681 and 4854.3380±146.8242 degree-days.(4) Effect of temperature to fecundity:The effect of temperature for fecundity was very obvious. At 19℃,22℃,25℃,28℃and 31℃, spawning rate were:53.3%,73.3%, 86.7%,80.0% and 66.7% respectively. At 19℃, because the adults ate little and almost didn't move, the success rate of mate was low. At the temperature, spawning rate was the lowest of the five temperatures. At the remaining four temperatures, the spawning rates were between 65% and 90%.(5) Effect of temperature to adult longevity:With the rising of temperature, the adult longevity became more and more short. The entire populations of colony averaged at different constant temperatures (19℃,22℃,25℃,28℃and 31℃) were to be 53.2 d, 48.7 d,40.2 d,30.5 d and 25.6d, respectively. At 22℃, the longest life was up to 85 days. In different temperature conditions, the average life of female was higher than the male's. At 31℃, the average life of adults were significantly lower than at 19℃.
Keywords/Search Tags:Anomala corpulenta Motschulsky, biological characters, threshold temperature, effcetive accumulative temperature, sampling technique
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