Symptoms Wheat generally does not show symptoms before winter, and most of them can see obvious symptoms during the jointing stage after spring wheat crops turn green. The diseased plants were obviously dwarfed and deformed, and the internodes were more and more dwarfed and intussusceptive, resulting in round leaves of the leaves. The base leaves were thickened and thickened, with dark green to green blue, and the leaves were straight and smooth. After many yellow curls necrosis. In the adult planting period, the upper leaves form a wide band of yellow irregularities, many of which cannot be normally jointed or heading. Even if the heads can be headed, the ear is tower-shaped, the spikes are short and small, and they are upwardly pointed. Severe growth stagnation of the disease, one month after the onset of symptoms, withered, the root hair was significantly reduced.
The pathogen Mycoplasma like organism is abbreviated as MLO, and it is called mycoplasma. It is the first kind of mycoplasma disease in domestic wheat. In the ultrathin sections of the leaf phloem and leaf salivary glands and intestinal cells, the MLO is spherical, elliptical, dumbbell-shaped, sickle-shaped, etc., and the size is 50-1000 nm, and the unit membrane thickness is 8-10 nm. It was designated as Wheat mycoplasma like blue dwarf by the leafhopper test. In addition to infesting wheat, the host also includes grasses such as barley, oats, rye, alfalfa, sorghum, and corn.
Transmission routes and conditions of the disease The virus can only be persistently transmitted through Psammotettix striatus, and no seeds or juice can be transmitted. The optimum food-feeding period is 24 days, and the shortest virus-taking period is 10 seconds. Prolonging the period of poisoning can increase the ability to transmit drugs. The protozoa in the body of the insects have a shortest period of 2 days and a maximum of 8 days with an average of 5.2 days. Disease incubation period is related to temperature. The average is 45 days in the fall and 19 days in the spring. At that time, the poisonous period was 19 days in the fall and 12 days in the spring. Ye Xie can be poisoned once in a lifetime, but eggs cannot be transmitted. After the emergence of winter wheat in autumn, the leafhoppers moved from the autumn crops and weeds to the wheat fields and transmitted the virus. In the early autumn of winter, when winter crickets grow eggs over wheat or weeds, they are allowed to incubate in late spring and then begin to pass the virus. Before the wheat was harvested, it flew to the corn, sorghum and a variety of grass weeds. In China, Shaanxi and Gansu provinces have three to four generations of annual populations of sand leafhoppers, and their occurrence is closely related to the occurrence of wheat blue dwarf disease. weight. Variety disease resistance is different.
Prevention and control methods (1) As soon as possible to organize efforts to breed new wheat varieties resistant to blue dwarf disease. The original local breeds are all susceptible. In recent years, the introduction of money to pay wheat, 2711 showed a high degree of resistance. (2) For other methods, see Wheat red dwarf disease.
Honghui capsule produces gelatin hollow capsule in large scale with well-equipped facilities.
The gelatin hollow capsule is a shell with special color and shape, made of the main raw material of gelatin. It is always used as special packaging of medicines or health care products which have bad smell, light sensitive of unstable,.
The capsules do not need adhesives and numerous excipients during the production process, easy to disintegrate and release in gastric juice.
Size 0el Gelatin Empty Capsules
0el Capsules,0el Gelatin Capsules,0el Gelatin Empty Capsules,Size 0el Gelatin Capsules
Zhejiang Honghui Capsule Co.,Ltd , https://www.hhcapsule.com