Nghe An tests new cassava variety resistant to mosaic disease
Thanh Phuc - Hoai Thu - April 19, 2024 08:34
(Baonghean.vn) - In recent years, cassava mosaic disease has broken out and spread widely, causing a decrease in cassava productivity and quality, resulting in crop losses and factories running out of raw materials. Currently, the solution of finding new disease-resistant cassava varieties is being implemented in localities in the province.
Cassava mosaic disease has the scientific name Sri Lanka Cassava Mosaic Virus. The disease is transmitted by whiteflies and cuttings taken from diseased plants. This is a very dangerous disease and difficult to prevent. Photo: Thanh PhucThe typical recognizable symptom of cassava mosaic disease is mottled yellow mosaic on the leaves. Mild damage causes no deformation, or mild deformation. Severe damage causes cassava leaves to curl, bend, wrinkle and gradually kill the plant. Photo: Hoai ThuMr. Nguyen Van Thanh's household in Hoi 3 hamlet, Hoi Son commune (Anh Son) has been growing cassava for more than 6 years now. According to Mr. Thanh, compared to corn, cassava is more economically efficient, has lower input costs, and has a purchasing factory so there is no worry of stagnation. However, in the past 2 years, cassava mosaic disease has appeared and spread widely, causing productivity to drop sharply. Photo: Thanh PhucMs. Nguyen Thi Vinh, a cassava grower in Hoi 3 hamlet, Hoi Son commune (Anh Son) said: "This spring, my family's 6 sao of cassava are all infected with mosaic disease. If before, 1 sao yielded over 2 tons, now, when cassava is infected with mosaic disease, the yield has decreased to about 1-1.2 tons." Photo: Hoai ThuCurrently, the entire Hoi Son commune has 70 hectares of raw cassava with 200 growing households, most of which are infected with mosaic disease. Photo: Thanh PhucMaster Phan Duy Hai - Deputy Head of the Provincial Department of Cultivation and Plant Protection explained: There are two ways to transmit cassava mosaic disease, which are from cuttings and whiteflies. For cuttings, the virus exists in the cassava stem, leaves, and tubers, so when using cassava stems as seeds for the next crop, the virus will continue to multiply in the cuttings and curl the leaves as soon as the plant sprouts... Therefore, the most effective measure currently to overcome cassava mosaic disease is to replace it with new, disease-free and disease-resistant cassava varieties. Photo: Thanh PhucThese cassava varieties were imported from the southern provinces to support local people in experimental planting. Photo: Hoai ThuCurrently, new, disease-free and disease-resistant cassava varieties such as KM94, HN1, HN5 are being tested in the following localities: Tan Ky, Thanh Chuong, Anh Son, Nam Dan. Photo: Thanh PhucAccording to initial assessment, the new cassava variety grows well and is disease-free. In the coming time, when its productivity and quality are confirmed, it will be widely propagated and planted to replace the old cassava variety. Photo: Thanh PhucIn addition, the model of growing cassava covered with plastic is also being applied in many localities. Mr. Nguyen Van Thuy - agricultural officer of Hoa Son cassava starch processing factory (Anh Son) said: "Growing cassava covered with plastic will limit mosaic disease. In particular, growing cassava covered with plastic saves care work such as weeding, shortens the time to harvest cassava, compared to growing cassava normally, the yield is doubled. The starch content of cassava covered with plastic is also higher". Photo: Hoai Thu
Clip: Phuc - Thu
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