Bài viết Thực trạng bệnh vàng lá thối rễ trên cây cam sành tại huyện Hàm Yên, tỉnh Tuyên Quang được nghiên cứu nhằm đánh giá thực trạng bệnh vàng lá thối rễ trên cây cam sành, xác định được các nguyên nhân gây nên bệnh vàng lá thối rễ và đề xuất giải pháp khắc phục nhằm tăng hiệu quả cho cây cam sành tại huyện Hàm Yên, tỉnh Tuyên Quang. | TNU Journal of Science and Technology 228 01 334 - 341 ASSESSING THE STATUS OF YELLOW LEAF ROOT ROT DISEASE ON SANH ORANGE IN HAM YEN DISTRICT TUYEN QUANG PROVINCE Ha Duy Truong Nguyen Quynh Anh TUAF Center of training and research on plant and animal breedings ARTICLE INFO ABSTRACT Received 11 10 2022 The purpose of this study was to evaluate the status of yellow leaf root rot on Sanh orange identify the caused of yellow leaf root rot and propose solutions Revised 07 12 2022 to increase the effectiveness of Sanh orange in Ham Yen district Tuyen Quang Published 20 12 2022 province. We collected the information from farmers about the current farming situation production conditions and taked the soil samples from the survey sites to analyze and determine the cause of yellow leaf root rot disease in Ham KEYWORDS Yen district Tuyen Quang. The survey results show that the majority of Cam sanh orange-growing households get seedlings from places with no clear origin 82 the use of organic fertilizer for orange trees in the locality has not been Ham Yen noticed by the people. In terms of use up to of households do not use Orange organic fertilizers or decaying manure the remaining of households Yellow leaf use but the amount of organic fertilizer for plants is quite low the amount of fertilizer Inorganic plants have not yet complied with the technical process of Root rot producing earthen orange trees. The results of analysis of soil samples for orange production in Ham Yen which have pH ranging from to EC from to mS cm are acidic or very acidic soil. Measures to improve soil help plants can better absorb nutrients. The analysis results showed that the number of fungal spores in the soil samples ranged from 408 to 595 spores 100g of soil and the characteristics of some nematode species were identified specifically H. .cavenessi . THỰC TRẠNG BỆNH VÀNG LÁ THỐI RỄ TRÊN CÂY CAM SÀNH TẠI HUYỆN HÀM YÊN TỈNH TUYÊN QUANG .
