Rice strain disease
Sing a song with you, please listen to it for me. The bell and drums are not expensive, but I hope that long drunkenness does not wake up, the ancient sages are lonely, but there are drinkers to stay its name. Ha ha, you heard it right is Li Bai, but today the village chief Xiaoli not Kan Li Bai nor Kan Du Fu, only Kan Kan we Road Qu disease. Because there is a Qu word, suddenly remembered the old grandfather Li Bai, incidentally, to remember him, is not also seem us a little sentiment. Back to the topic, rice qu disease, also known as false black disease, green black disease, green powder disease and so on. This disease usually occurs on late rice, glutinous rice and hybrid japonica rice incidence is higher than other varieties, we hear the hybrid is not to think of foreigners, yes this disease is really the introduction of new varieties before the big release, so the foreign moon is not necessarily round Oh. Rice is mostly susceptible to the disease at the spike and flowering stage, forming a spike disease, and depending on the variety, climatic conditions and fertilizer management and other conditions, there are significant differences in the degree of incidence between rice fields, thus affecting the yield. In some years, the disease occurs severely on individual varieties, with a serious incidence of up to 60% or more, with 1~5 grains per spike, and up to 20~30 grains per spike resulting in large yield losses. This disease is a fungal disease, mostly occurring in good years of rice harvest, farmers mistakenly believe that it is a sign of a good year, so there is a "harvest fruit" commonly known.
I. Identification and occurrence
The fungus is encouraged to damage part of the rice spike, first revealing a small yellowish-green fungal mass at the seam of the glumes (that is, the layer of the shell wrapped around the rice), gradually expanding, and finally wrapping the whole glume, which is a bit like a balloon. Sick valley is 3 to 4 times larger than the healthy grain, dark green or olive, the surface is smooth, and finally cracked; balloon blowing over will burst. Covered with dark green powder (for the thick wall spores of the disease, thick wall spores is a fungus as thick as the wall of something resistant, the wall is as thick as the walls, guns can not penetrate), cut open the disease grain, the center white, its periphery in three layers, the outer layer of dark green or olive, the second layer, orange, the third layer of yellowish. The same as peeling eggs, but you have seen the dark-colored olive shell wood, there are words to tell Xiao Li, Xiao Li also go long knowledge.
The infestation cycle of rice borrelia is more complex. It seems that the specific now those experts also did not get clear, it is estimated to waste a lot of dry rice. Can only have about, generally, perhaps to explain. In general, the disease to the thick wall spores, is the thick face spores attached to the seed surface or fall into the field overwintering: the nucleus falls in the field overwintering: the next year, the thick face spores sprouted to produce conidia, the nucleus sprouted to produce sub do, the zygote formation cyst shell and cyst spores, anyway, is born to go right, the disease if when you can also family planning would be good, then we humans and plants are not so Many people and plants are not so old and sick and die. The ascospores and conidia in the rice gestation period (mainly broken mouth is out of a mouth to come out of the spikelets 6-10 days before the spike, that is, the pollen mother cell meiosis to pollen formation period) by air, rain, dew spread into the leaf sheath to infest the flower organ and young glumes, causing seed disease. The source of infestation is mainly the ascospores produced by the nucleus, and the conidia produced by the thick-walled spores also play a major role in infestation. All of the above is nonsense, nonsense and not practical not to fight food words, we do not blame Oh.
Second, to Kan Kan disease conditions.
The late growth of rice is too tender and lush, flowering period and encounter rainfall and high temperature, conducive to the development of the disease (the appropriate temperature for the growth of the disease 26 ~ 28 degrees) is prone to induce the disease. It is really a suffering child, flowering met with rain, not to say, after the rain and the sun exposure, not disease is strange. If you apply too much nitrogen fertilizer, or if the water falls dry too late, and the fire rice plant is close to maturity when the leaves are thrown to maintain a strong green, the disease is heavier. I said farmers uncle you always apply so much nitrogen fertilizer why, there is no place to throw more money, people are full, but also let people eat, people will be happy? In the future, that fertilizer before to Xiao Li, Xiao Li to you kan poetry sentiment of, not more happy. In addition. Variety on the onset of light and heavy relationship is also greater.
Three, do not go away, wonderful immediately come, prevention and control measures
1 agricultural control
First of all, choose disease-resistant and productive varieties, this truth is the world's avenue, no matter what diseases are available, if you want to become an expert must practice the first for this.
2 avoid leaving seeds in diseased fields, and burn the onset of blight early to avoid the spread of the disease. This article is standing and talking, but you can go and fool simple students of plant protection.
3 Strengthen cultivation management, pay attention to increase the application of phosphorus and potassium fertilizer, control late application, partial application of nitrogen fertilizer: carry out reasonable irrigation, enhance the disease resistance of rice, prevent collapse to reduce the disease. This article is more practical, but is also a universal avenue, must keep in mind, you can Kan to the people, he will be admired to you, like a torrent of water, continuous.
Buy or not, it does not matter, come over and take a look, take a look, the most down-to-earth pharmaceutical control is finally out. In the rice breakout about 6 days before the drug control. The agent can be used: 15% wellbutrin A soluble powder 70 grams per 666 square meters, or 6% wellbutrin . Serpentine wettable powder 80 grams, or 20% Wellbutrin. Wax bacterium suspension 100 g, sprayed with 50 kg of water. For the fields with disease in previous years, you can choose oxime. Tebuconazole aqueous dispersible granules 10~15g, sprayed with water, with the liquid focusing on the upper part of the plant. Most of the agents used to control rice blast can be used for the control of rice stunt, but the dosage must be doubled. The principle of rice borrelia control is to coat the spike with a layer of drug film to prevent the invasion of the disease, because the control of rice borrelia spraying site is in the upper part of the plant, so, when using the drug water should not be large, and strive to mist droplets fine, generally 40-50 kg of water per mu, to be used after the dew, rain dry.
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Copyright © Kaifeng Dadi Agrochemical Biotechnology Co., Ltd.
Powered by www.300.cn Business license SEO
This website supports IPV6