Studies On The Types Of Bamboo Diseases And A Development Law Of Major Diseases In Anhui

The kinds of bamboo diseases in Anhui was investigated, and the law of bamboo foot rot and the mechanism of some disease resistance were analyzed in this paper, Main results are as follows:1, There were 17 kinds of live bamboo diseases found in Anhui, of them seven kinds of leaf diseases, eight kinds of branches diseases, two kinds of root diseasea, and five kinds of bamboo wood diseases. In the while, the occurence characteristics of disease was introduced.2, Through the investigation of the law of the root rot, the lowest incidence was the southeast slope which is 7.7%; the more incidence rates were in the northeast and the gentle slope which were separatively 28.8% and 29.0%.3, The incidence of bamboo foot rot waries with slope, degree of slope was negative with the incidence of bamboo foot rot, and the correlation coefficient of Simple Liner Regression was 0.9185. the highest incidence was 29.0% when the slope is 0°.4, Soil bulk density,which has an influence on the growing of bamboo, is one of the main indicator of soil fertility. There is an obviously positive correlation between volume weight of soil and the rate of bamboo foot rot. What's more, as the soil bulk density increases, the incidence rate will also increase. We can see , from the variance analysis of data of bamboo foot rot(P=0.0001<0.01), the incidence of bamboo foot rot in several plots is significant.5, From the unary regression equation of soil porosity and the center of bamboo rot incidence ,we can see that there is a significant positive correlation between the incidence of morbidity and the porosity. Correlation coefficient: R~2 = 0.9303.6, Soil moisture has neither significant positive nor negative correlation with the incidence of bamboo foot rot. When the soil water content was 26.2%, the incidence of bamboo foot rot was at the lowest level. When the soil moisture is greater than 26.2%, reaching 29.4%, the incidence rate of disease was the highest. Suitable soil water content can resist rot on the bamboo shoot of infection.7, The incidence of bamboo foot rot was in the lowest level when soil water holding capacity was 5.960 g; the incidence of foot rot of sample plotⅤ,where the soil water holding capacity was in the highest level , is the highest ; the incidence of foot rot of the sample plotⅢ,where the soil water holding capacity lowest, was also higher than that of sample plotⅠ. Suitable soil water holding capacity can maintain the optimal growth condition of bamboo.8, The height of bamboo and eye-high were in inverse proportion to the incidence of bamboo foot rot. When the height of bamboo is up to 13.1m, the incidence of rot was 7.7%, which was the lowest; when the height of forest is down to 7.6m, the incidence of rot was 29.0%, which was the highest. The average eyebrow diameters, with the incidence rates of the root rot from low to high, were 9.4cm, 8.8cm, 8.3cm, 7.2cm, 6.1cm. while the incidence of foot rot was from low to high. The strongest resistance was nearly 1.5 times as much as the weakest resistance.9, There is generally a V-type trend between Canopy density and the incidence of bamboo foot rot. When the stand density was 7.7, the incidence of bamboo foot rot is at the lowest level; when the stand density was greater or less than this value, the incidence of foot rot rate will increase.10, Through the research and analysis of the relationship between the four enzymes in bamboo leaves and the incidence of rot, a certain correlation between the increasing of PAL and the increasing of the ability to resist disease could be seen; PPO can produced significant toxicity on the plant pathogen, so the PPO activity in the body of resistance bamboo are larger than that in round bamboo; through the variance analysis of disease incidence, the difference of POD activity was not significant; from the variance analysis table (P = 0.035541 <0.05), we can see that there is a significant difference in the CAT activity in the body of bamboo and round bamboo The CAT activity of bamboo is slightly higher than round bamboo.11,Through the high resolution HPLC-DAD-MS analysis, we can see that the round bamboo has one more clear peak than bamboo. The compound may be quinone or flavonoid derivatives. The susceptibility to tar spot disease of round bamboo may be related to this matter. After infected with tar pot disease, the defensive substance that is produced in bamboo can prevent pathogenic bacteria from further infection...