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Shoot blight of Eucalyptus leaves the causes and control of


Yap Yin Street 2.5295.3991.970 small forest village project demonstration area more than 2 yuan fertilizer 625g / line 47. O017.14131.611.4884.81197.17 east county borax 25 /, Jurassic 58.35l6.21130.81072.46flO0.00 board forest model surface cK (not applied) 49.4466782.2852. 3132.840 plot 2 acres. Induced physiological diseases. If we plant growth on the incidence of a certain amount of soil boron added to this disease can be completely removed to make normal growth. Sleep 4, soil and plant groups by Shue Tan Products ■ Laboratory tables turned with incidence of disease to disease onset disease Kam Ting boat without disease (severe) heavy blue gum Eucalyptus grandis soil samples soil samples thousands of eucalyptus blue gum straight the whole amount of boron PPm 33. 8992.882.8I2.984.744.7321.31 ppm boron available 0.036O. 197 Second, the control study to find out the cause of shoot blight of Eucalyptus leaves on the basis of a more cost-effective way to control the disease, we made the application amount of boron quantitative test. That is representative of the incidence of sub-regional selection of borax, Pu District root application 12.5g, 25g, 50g, 100g, 150g, and poured the same amount of water, repeated 3 times, at the same time as control area, measured 210 days after treatment, from measurement results indicate the treatment applied borax asked no significant difference. General, when planting seedlings facilities l2.5g ,2-3 strains of Health and robbed in a tree with facilities 25g, you can effectively achieve the control effect. In addition, soil development in different parts of the differences in the level of the soil PH value, soil moisture, rainfall, size, soil fertilization is reasonable, the amount of organic matter in soil and other factors, makes the boron content in the soil there are some differences . Therefore, plant B deficiency should be based on different reasons, to take appropriate preventive measures. 1, boron content in soil rich in whole, and eucalyptus plants are boron deficiency is not yet, take the following preventive measures: (1) PH value adjusted to slightly acidic soil; (2) Note the dry season irrigation water needed to ensure plant ; (3) Adding organic matter; (4) should not be excessive application of lime, potash, nitrogen; (5) to create a mixed forest, planting green manure, increasing the surface coverage, and reduce soil erosion; (6) prevention and control of soil pests, thus contributing to organic , the effectiveness of adsorbed boron into boron, which will help plants absorb, mitigate the phenomenon of plant B deficiency. 2, low levels of total boron in the soil, eucalyptus plants showed symptoms of boron must, in addition to the above indirect control measures, the need to take the following preventive measures directly supplies. (1) application of the soil according to age, tree vigor, disease levels may be. General, when applying borax planted seedlings l0 grams per plant; 2-3 years old saplings wiping Shi 20-5o grams borax, and water 500 - 1000 times can be. (2) foliar spraying can be prepared solution of 0.25 sand cracking boron spray uniformly cloudy or late afternoon, three months, applied three times a year. (3) trunk injection, with five ten thousandths parts of borax solution injected in the trunk. 3-5 meters in height per plant fertilizer plant l-2 grams. After more than promote the use of control methods, the shoot blight on Eucalyptus leaves have obvious effect, and has a high economic investment value. Eucalyptus oil production is only one meter, ten months of orchid tree, eucalyptus robbery, the control was increased after the 20.56 times than seven months, three years after students blue eucalyptus control after eleven months increased 15.27 times than the control, Every dollar invested in prevention and treatment fee will be a pure stab 1. Children of a 5.19 yuan. Reference text cricket Note: This topic in the research process for 7 Midu County Agriculture and Animal Husbandry senior agronomist Ming Jiang, Dong Hua policy comrades comrades Midu County Forestry Bureau Bai Rurong great help. 7 Kunming Institute of Ecology of soil borne and plant sample analysis laboratory. County Forestry Bureau of Pengyun Long Midu 7 comrades from the drawing table working paper. To express heartfelt thanks. q qq help fine fine fine fine q q He fine (Continued from page 13) 0.75 kg, such as ditching the amount of force applied 2 kg of wheat per mu solid ammonia bacteria. V. Summary table associated nitrogen-fixing bacteria in rhizosphere of wheat, is a successful research in China in recent years, increase microbial agent, and soon l6 provinces in the country promote the use of, have received increased production of ammonia solid early germination of wheat fungus, leaf area increase in dark green leaf color, plant wiping robust, more tillers, panicles, grain number, grain weight, etc.,[link widoczny dla zalogowanych], have increased. Root growth. Increased drought and to soil fertility cold, so Xiacha crops continue to increase, and pollution. The technology is easy to grasp, less investment, high efficiency, the ratio of input and output l: 15 ~ l9, carbon and nitrogen per acre can save 12 kg wheat area in China are advised to promote the use of. (