MySheen

Licorice rust and its control

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, ① pathogen Glycyrrhiza uralensis rust pathogen (Uromycesglycyrrhizae) belongs to the genus → of the subphylum basidiomycetes, →, → rust, → Puccinidae. The regularity of ② is a. In the summer spore stage, at the seedling stage of Glycyrrhiza uralensis, a light brown summer spore pile appears at the tip of the leaf that has not yet spread. With the spreading and growing of the young leaves, the spore pile appeared densely along the leaf back from the leaf tip, and finally the whole leaf back was covered by the spore pile, showing a yellow color.

① pathogen Glycyrrhiza uralensis rust pathogen (Uromycesglycyrrhizae) belongs to the genus → of the subphylum basidiomycetes, →, → rust, → Puccinidae.

Incidence regularity of ②

a. In the summer spore stage, at the seedling stage of Glycyrrhiza uralensis, a light brown summer spore pile appears at the tip of the leaf that has not yet spread. With the spreading and growing of the young leaves, the spore pile appeared densely along the leaf back from the leaf tip, and finally the whole leaf back was covered by the spore pile, showing a yellow color, generally, all the leaves of the whole plant were diseased, and the diseased plant was obviously dwarfed.

b. In the winter spore stage, the winter spore pile is dark brown, the color is darker than the summer spore pile, the spore pile is disconnected, sporadically and sparsely distributed on the back of the leaves, but the incidence of diseased plants and diseased leaves are high, which does not seem to have much effect on plant growth.

The initial, peak and last stages of the occurrence of the diseased plants of Glycyrrhiza uralensis were early, middle and late July, and the peak of the occurrence of winter spores was about 70 days from the peak of the disease.

③ damage status of plants infected with Xia sporidium, the mortality rate of infected plants was very high, up to more than 98%, and caused the death of roots and rhizomes, affecting the harvest yield. The occurrence of winter spore disease is more common, but the plant will not die from the disease, which is completely different from the harm of summer spore disease.

④ control strengthened field investigation and found that summer spore disease plants should be pulled out in time to prevent transmission; irrigation in winter and spring and timely harvesting of aboveground stems and leaves in autumn could reduce the occurrence of the disease; Fenqining and Nongkang 120 treatments had a very significant control effect on licorice summer spore rust plants, and the relative control effect was more than 71.2%.

 
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