Wilt disease of Cinnamomum cassia in nurseries and control measures for diseases management in Lao Cai province

Abstract

Cinnamomum cassia belonging to the family Lauraceae is a multi-purpose tree. Previously, only the barks of Cinnamon trees were consumed. Currently, the stem, branches, leaves are sold at high prices. Cinnamon stalks are sold to wood processing factories for boards, flooring, furniture or pillars. The products from cinnamon can be processed into large quantities of valuable commodities. In addition, Cinnamon also contributes to the protection of the ecological environment, preserving and developing the variety of indigenous
precious tree species. Currently, the Cinnamon plantation in our country reached 40,000ha, in Northern Vietnam, Cinnamon mainly distributed in the provinces of Yen Bai, Lao Cai and Quang Ninh. In the coming years, Cinnamon growing area will be expanded in both size and area. With the rapid increase, many Cinnamon nurseries and plantations in some localities are facing the risk of pests and diseases. The death of Cinnamon in the nurseries of Bao Thang district, Bao Yen district, Bac Ha district and Van Ban district of Lao Cai province was identified by Phytophthora cinnamomi and Pythium vexans. For control measures of diseased plants during the nursery period, it is
necessary to apply integrated management such as eliminating infected plants, using fungicides (Ridomil 72WP with the concentration of 0.5-1%; Agrifos 400 with the concentration of 0.5-1% in 4 liters/100m2) were sprayed 2 to 3 times at intervals of 10 to 15 days. When preparing seedlings, we can use some biological products Trichoderma or other bio-preparations that are resistant to pathogenic fungi to control the disease. Before nursing seedlings, the nurseries need to be cleaned, drainage, avoid the flooded beds, disinfected with fungicides calcium carbonate powder. In the process of watering trees, clean water must be used.