Symptoms are also called fissure dwarfism. Distributed in Guangdong, Fujian, Taiwan, Hainan, Hunan, Hubei, Jiangxi, Zhejiang and other provinces. The affected strain was dwarfed, the tip of the leaf was rotated, and the edge of the leaf had jagged nicks. The tip of the infected leaf in the seedling stage often rotates more than 10 times, and the lower leaflet of the heart leaf is broken into a notch, mostly jagged. Dwarfed plants in the tillering stage were dwarfed, the plant height was only 1/2 of the healthy plant, the leaves were crumpled and twisted, the edges were jagged, the depth of cut was about 0.1-0.5cm, generally not more than midrib, and there was usually 3-5 nicks on one leaf. Sometimes up to 13. Some varieties are at the jointing and booting stage and produce 1 to several branches at high nodes, which are known as "pitching phenomenon". Spikelets are extracted from branches and are not more robust. Sometimes the leaf sheath veins are swollen, the flowering of the diseased plants is delayed, the flag leaves are shortened, and the ear is small. The pathogen Rice ragged stunt virus is abbreviated as RRSV, which is called rice fission virus and belongs to the Reovirus group. The virions are equal-diameter spheroids 50-60 nm in size and contain double-stranded RNA. With a passivation temperature of 60°C and a dilution limit of 100,000 times, the virus survived in the phloem cells of rice leaves. Transmission route and disease condition The virus transmission medium of this disease is mainly Nilaparvata lugeas, and the transmission rate is 2.5%-55%. The virus can circulate for 10 days in the body of the insect and can transmit the virus for life. However, it cannot be transmitted from egg to egg. One generation, there are gaps in drug transmission phenomenon, gap period of 1-6 days, rice infection after 13-15 days after incubation revealed symptoms, the length of incubation period and temperature-related. Incidence and Poisoning Quantity related. In the field, the disease has a double or triple infection or compound infection, that is, the same plant can be multiple infections with Dentivirus and other viruses, and there are symptoms of individual or co-existence. In addition to infecting rice, the virus can also infect wheat, corn, sugarcane, barnyardgrass, and Lee's clams. See yellow rice leaf disease for prevention and control methods.
Ningxia
Kofolon International Co.,Ltd make and export Horseradish Powder.We have
our horseradish planting base with 5000 acres.Our horseradish powder is
used for material of Horseradish Paste and for Japanese food,sea food and
fashion food. Our horseradish powder is healthy,natural,spicy and
delicious, and very popular in Japan,Korea,America,Europe,Brazil,Taiwan,South-East
Asia,etc.
We
can make provide you horseradish powder as your request,such as quality,price,packing,etc.
More
details is following.
Season:from
NOV.to FEB.next year.
Packing:25kgs/CTN 15.5
tons/20`FCL
Ingredients:horseradish
Delivery:20
days
MOQ:5TONS
Payment:T/T
Dehydrated Horseradish Powder,Horseradish Powder,Dry Horseradish Powder,Dried Horseradish Slice NINGXIA KOFOLON INTERNATIONAL CO.,LTD. , https://www.kofolon.com
Rice tooth dwarf disease