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Of red rust in Nantong City, San increase occurs because


Since the graft, since the possession of mulberry kg. cultivate mulberry 2,550,000 resistant, disease-resistant planting mulberry 2MO acres, representing an area of newly planted mulberry 53%. the establishment of disease-resistant varieties of mulberry, mulberry contraction to control the spread of the disease has played a positive role. t 1990 the egg industry in Jiangsu Health and temperature, humidity most closely, when the temperature at 13 ~ 28 ℃ humidity 8O above, with the temperature and humidity increase the incidence of serious. From March onwards as the temperature rise and winter buds began to sprout The pathogen was also extended in the development of winter buds, bud disease will continue, temperature, speed up the course. Charles city meteorological data in 1990: since mid-March, average daily temperature of 1O ℃ or more, more than 10 days earlier than normal , 5 days moving average temperature (stability) appeared in the August 17, 20 days earlier than the calendar year, as the temperature rose early} special high relative humidity, relative humidity in late March 90, rarely in history,[link widoczny dla zalogowanych], future relative humidity between 75-85. From the data shows the city in 1990, a few warm, high humidity environment, the site is evoked one of the factors mulberry red rust. 3. Mulberry intercropping domestic unreasonable. Some support silkworm white mulberry solid economic benefits to improve, find ways to increase the solid mulberry intercropping, some sets of folders types of terraces for the year, variety,[link widoczny dla zalogowanych], Sang solid become a Normally closed for spring oilseed rape, wheat, intercropping summer fruits, soybean, corn, sorghum, etc., Sang poor domestic air and light microclimate environment for the growth and spread of rust red mulberry provided the conditions. 4. Close planting mulberry growing into a film, can also induce the disease. Measured according to withdraw Haian station Sang Wang pile worms, Zhang guillotine stack point survey reported, where 1,200 acres planted into Lin Sang on the general incidence, the highest incidence of strains of about 25, the victim is also heavier. Although Rugao County silkworm farm about 500 acres of the Conference, but into a piece of mulberry forest belt of the grid is small, wide field micro-climate is poor, disease strains is greater. Mulberry in the site environment, coupled with the communication system, such as not supporting the high water table, water holding capacity increased field illustrates, in more humid environment, may lead to the occurrence of rust red line 5. Sha Fei ward mishandled. Use of a large number of silkworms silkworm Zhuang Ye, due to labor tensions, inclusions in the healthy leaves of diseased leaves to feed silkworms Jamsil also brought back a large number of rust spores distributed in the silkworm sounds of the sand plaque, these hoop retting by fermentation of sand do not directly withdrawal within the San solid or stacked around the mulberry, and later, rust spores flapping in the wind, hafnium once again create the conditions for infection, which is the main cause of disease spreading =,[link widoczny dla zalogowanych], trend analysis from the city Building Measures overall, nearly two years to the disease incidence increased year by year, the incidence has expanded in area but also has caused some losses. Ig90 one by one from the I98B Comparison of the disease: Sang pest Qidong Census 1988 statistics, the mulberry area of red rust disease longum 2067 acres in 1990, 4,328.5 acres,[link widoczny dla zalogowanych], 2 times in 1988. Haian incidence area in 1990 and 1 million acres. Mulberry red rust from the infection cycle and the onset of the Rule, specifically against the pathogen of mulberry, no other host, and the leaves, petioles, buds of mulberry, mulberry, spears and other organizations can shoot morbidity, such as red mulberry rust does not take measures, the incidence will become increasingly serious, should be highly valued. Sang for the occurrence of red rust situation and law, control should do the following: First, the summer after cutting mulberry garden thoroughly clean to remove disease. Mulberry fall to strengthen the monitoring, improve forecasting, and the incidence of shoots removed the power of organization, the early onset of the plots can be sprayed 2O's Carboxin Triadimefon 250 WP Agent 25 times or 1000 times, to contain the disease. Secondly,[link widoczny dla zalogowanych], the patients buds, diseased leaves and sand to the retting dare fermentation Zaishi into mulberry fields and eliminate the lotus copied directly sown in the field so as to prevent virus spread. Third, to improve the microclimate environment mulberry. First, to be rational close planting mulberry solid, it is necessary to consider the quick yield, but also not too close, to 1000 per acre is about as good, and second, to achieve a reasonable cyberspace as mulberry, young Lin Sang may be appropriate to some short-term low-dry crops, intercropping, Note Mulberry air and light and the third is around the Lim-Ah-layout should be reasonable mulberry, silkworm mulberry field for each mu of forest with the grid properly, to avoid excessive forest planting operation to clear the trench t Fourth Department, in a timely manner eliminate waterlogging and reduce the water table, improve the environment. Fourth, any incidence of terraces, winter can be taken to re-cut after shoot pruning diseased branches carrier of serious illness can be spraying area plots one by one crossing the US-4, 5 degree trees disinfection liquid lime sulfur. After the spring as temperatures rise, combined with search insects, buds were working in the disease, timely issue of pest information, organizational strength removal disease bud, leaf, repeated Po investigation, complete fight disease.
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