Ginger seasonal febrile diseases calls decay disease or green withered disease again, spread disease for bacterial sex earth, it is big Jiang Sheng in producing exist generally and the annihilative disease with harm extremely strong sex. Ginger seasonal febrile diseases basically happens in more during summer, tall hair of ginger seasonal febrile diseases is after hill up especially period. Basically endanger a ministry and Jiang Kuai, shape of water be soiled, cinnamon, interior is shown at the beginning of Jiang Kuai of catch a disease gradually bate is cankered, ginger ginger seasonal febrile diseases basically endangers rhizome, mostly in close ground on cauline radical ministry and subterranean rootstock half come on first. Shape of water be soiled is at the beginning of ill ministry, cinnamon, lose luster, bate is cankered. Stay only cortical. White turns into inside cankered organization ropy juice, and effluvial odour. Place of ginger bine be murdered shows dark purple, hind
Ginger seasonal febrile diseases calls decay disease or green withered disease again, spread disease for bacterial sex earth, it is big Jiang Sheng in producing exist generally and the annihilative disease with harm extremely strong sex. Ginger seasonal febrile diseases basically happens in more during summer, tall hair of ginger seasonal febrile diseases is after hill up especially period. Basically endanger a ministry and Jiang Kuai, shape of water be soiled, cinnamon, interior is shown at the beginning of Jiang Kuai of catch a disease gradually bate is cankered, ginger ginger seasonal febrile diseases basically endangers rhizome, mostly in close ground on cauline radical ministry and subterranean rootstock half come on first. Shape of water be soiled is at the beginning of ill ministry, cinnamon, lose luster, bate is cankered. Stay only cortical. White turns into inside cankered organization ropy juice, and effluvial odour. Place of ginger bine be murdered shows dark purple, become cinnamon after, in-house organization changes brown is cankered. In cankered process, because rhizome loses the function of imbibe, upright lamina is reached on the bine receive a leaf to appear become yellow symptom, serious when, blade wilting is curly, xie Se by yellow turn into withered Brown, final bine leaf is withered dead.
Transmission way
Kind ginger, soil, fertilizer, water, agronomic operation all can transmit bacteria of green withered disease. Kind ginger belt bacterium is main invade first catch a source, also be bacterium of cause of disease remote the main avenue of transmission. Take bacterium to plant central diseased or infected plant can be become after ginger grow, rely on pest of ground running water, underground and agronomic operation transmission, borrow by cut of big ginger plant transmission is invaded. The bacteria can be being planted the live through the winter on ginger, soil and the fertilizer that contain ill incomplete substance, can survive 5 years in soil commonly above. Air temperature tall, humidity the weather of Hu Yu of big, Hu Qing, the happening of advantageous ginger seasonal febrile diseases and transmission.
Deliver pathogeny vegetable
Reason 1, spread disease by fertilizer and irrigation water:
Pollute the fertilizer that pass by body of incomplete of catch a disease catch a disease, if make compost is reached,do not wait for what organic fertilizer can cause different level to come on via the barmy compost, person cultivate manure without become thoroughly decomposed. Upriver tall plot comes on, ill water flows into downstream small plot to bring about directly come on, still can bring about disease to be accelerated quickly spread.
Spread through investigating discovery to ill tanaka bacteria can follow running water and diffuse, flooding, stringing together fill is one of main factors that quicken disease popularity, be in especially field when having fragmentary diseased or infected plant, agglomerate diseased or infected plant appears after often irrigating, this is bacteria downstream transmission invades caught result again.
Accordingly, once Jiang Tian discovers central diseased or infected plant hind, appropriate uses shallow water furrow irrigation or irrigate, flooding of avoid by all means, string together fill. Use at the same time without the bacteria clean water, the water that be like a well, river water.
Reason 2, affect by temperature:
Outside affecting ginger seasonal febrile diseases to produce popular main factor to cause disease except bacterium of cause of disease, still have temperature, humidity and rainfall. The most comfortable temperature of bacterium of cause of disease of ginger seasonal febrile diseases is 28 ～ 30 ℃ , according to field observation: Come on temperature is day of average air temperature to be in 30 ℃ of 20 ～ above, the most comfortable come on temperature is 28 ～ 35 ℃ .
Ginger seasonal febrile diseases comes on initial stage is in in June ～ of the last ten-day of a month in July the first ten days of a month, fill hair period to be in in July ～ of the last ten-day of a month in September the first ten days of a month, illness of the last ten-day of a month in September stops gradually. As a result of on July 20, 2003 ～ the first ten days of a month lasted in September high temperature amounts to many days 40, and the air temperature of high temperature weather all is in 35 ℃ above,
The discretion of temperature, can affect disease popularity rate directly, temperature adds coefficient of breed of bacterium of a serious illness high, shorten preclinical, increase to be invaded again acquire a number. From the system investigation makes clear, air temperature 25 ℃ of 20 ～ from come on plant is withered need 15 ～ 18 days to death, air temperature 35 ℃ above from come on withered need 6 ～ 8 days to death.
Reason 3, affect by rainfall and humidity:
Rainfall can affect the happening of ginger seasonal febrile diseases and popular rate directly. According to weather data and integration analysis of sick condition of field and actual hair: The our city was in 2003 in May ～ of the first ten days of a month in September the last ten-day of a month, ginger is whole average air temperature all is in growth period day 20 ℃ above, accorded with the disease requirement to temperature basically. So disease produces what the rainfall July and rainfall and sunshine day count 6 ～ to basically depend on sooner or later than; The degree that come on basically depends on come on earlier rainfall and come on fill period lukewarm wet condition.
Measure of disease prevention and cure
The directest way: Expand period, advocate the seasonal febrile diseases that prevent ginger: Sparge + root of key area fill: Green withered 150-300 establishing a gram times + times dilute uses garlic oily 1000-1500. The standard is fully with fill when fill root, general every individual plant needs 300ml about.
