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  1. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 09

    Deep tillage enhances the spatial homogenization of bacterial communities by reducing deep soil compaction

    HU Ruiwen(1); ZHENG Bufan(1); LIU Yongjun(2); PENG Shuguang(2); GONG Jia(1); LI Junhui(1); QIN Tian(1); LIANG Jingsong(1); XIONG Kunlong(1); ZHENG Zhongyi(1); HU Yajun(1); YI Zhenxie(1); ZHOU Qingming(1); LI Juan(1)
    (1) College of Agronomy, Hunan Agricultural University, Changsha, China; (2) Hunan Branch of China National Tobacco Corporation (CNTC), Changsha, China
    Pressure from machinery and continuous agricultural production exacerbate soil compaction. Deep tillage (DT) can reduce subsoil compaction, but the effects of DT on soil bacterial communities at various spatial and temporal scales and the...
  2. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 10

    A multi-county survey of plant-parasitic nematodes in North Carolina tobacco fields

    BONYAK H.C.(1); GORNY A.M.(1); VANN M.C.(2); LEWIS R.S.(2); DAVIS E.L.(1)
    (1) North Carolina State University - Department of Entomology and Plant Pathology, Raleigh, NC, U.S.A.; (2) North Carolina State University - Department of Crop and Soil Sciences, Raleigh, NC, U.S.A.
    The genera of plant-parasitic nematodes (PPN) known to infect tobacco include root-knot nematodes (Meloidogyne spp.), lesion nematodes (Pratylenchus spp.), the tobacco cyst nematode complex (Globodera tabacum), and stunt nematodes (Tylenchorhynchus...
  3. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 11

    Screening of insecticides for controlling Myzus persicae in cigar leaf fields and safety evaluation of Rhynocoris fuscipes

    CHEN Dexin(1); XIA Changjian(1); SUN Ranfeng(2); MA Guangxiang(2); DENG Haibin(3); WANG Xinggao(2); SHAO Yu(4)
    (1) Haikou Cigar Research Institute of Hainan Branch of CNTC, Haikou, Hainan, China; (2) College of Plant Protection, Hainan University, Haikou, Hainan, China; (3) Guangdong Institute of Tobacco Science, Wujiang, Shaoguan City, Guangdong Province, Guangdong, China; (4) Danzhou Branch of Hainan Tobacco Company, Danzhou City, Hainan, China
    In order to identify effective and Rhynocoris fuscipes-friendly aphid control agents in tobacco fields, the toxicity of nine common insecticides to Myzus persicae and R. fuscipes was assessed using the leaf-dip and residual film methods in glass...
  4. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 12

    A new index "root-knot density" was created which can objectively evaluate the damage of root nematodes on tobacco

    FAN Miaomiao(2); DAI Kuai(1); LIU Meiju(3); ZHANG Limeng(4); LIN Shan(2); LI Jiangzhou(1)
    (1) Research Center of Biological Control Engineering for Tobacco Diseases and Insect Pests of China Tobacco/Yuxi Branch of Yunnan Tobacco Company, Yuxi, China; (2) College of Resources and Environmental Sciences, China Agricultural University, Beijing, China; (3) College of Resources and Environmental Sciences, Yunnan Agricultural University, Kunming, China; (4) Yuxi Zhongyan Tobacco Seed Co., Ltd., Yuxi, China
    Root-knot nematode disease occurs frequently due to continuous mono-cropping and excessive water and nitrogen input. The disease degree and gall index are often used to evaluate the damage of root-knot disease. However, the weak correlation between...
  5. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 13

    Photosynthetic performance as a tool in detecting infection in tobacco (Nicotiana tabacum)

    MATEVA K.I.; MUKOYI F.; RUZANE R.T.; MAGAMA F.; DIMBI S.
    Tobacco Research Board (TRB), Kutsaga Research Station, Harare, Zimbabwe
    Photosynthesis is the key process for plant growth and development. By calculating the rates of chlorophyll fluorescence kinetics, it is possible to quantify the impacts of environmental stresses like phytopathogen infection on photosynthetic...
  6. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 16

    Fungicide and starter fertilizer placement at transplanting

    STAINBACK C.G.; VANN M.C.; MACHACEK J.L.; CHEEK J.A.; WHITLEY D.S.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    Starter fertilizer and fungicide products are commonly included in transplant water solutions. It has been hypothesized that a different placement strategy is needed in order to minimize chemical and soluble salts injury. Research was initiated in...
  7. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 18

    Study on hyperspectral multivariate linear prediction model of tobacco leaf nitrogen content

    GUO Ting; LI Wujin; XIAO Xi; LI Hongguang; LI Wen
    Chenzhou Tobacco Company, Chenzhou City, Hunan Province, China
    The nitrogen content of tobacco leaves has a direct bearing on the gene expressions of nitrogen metabolism-related enzymes and on the amount of nitrogen metabolites (Alinat et al., 2015). Hyperspectral remote sensing, originating in the 1920s, offers...
  8. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 19

    Automatic discrimination planting areas of flue-cured tobacco based on near-infrared spectroscopy technology and support vector machine improved by whale optimization algorithm

    QIU Changgui(1,2); LIU Ze(3); QI Lin(4); YANG Jingjin(4); WANG Xianguo(4); WENG Ruijie(4); LIU Jihui(4); WEI Qing(1); LIU Jing(1,2); YANG Panpan(1,2); LI Siyuan(4)
    (1) Yunnan Reascend Tobacco Technology (Group) Co., Ltd., Kunming, China; (2) Yunnan Comtestor Co., Ltd., Kunming, China; (3) China Tobacco Yunnan Industrial Co., Ltd., Kunming, China; (4) Hongyun Honghe Tobacco (Group) Co., Ltd., Kunming, China
    A study was carried out to accurately and rapidly identify planting areas of flue-cured tobacco. A total of 201 flue-cured tobacco samples from three different areas in Kunming, Honghe and Qujing, Yunnan Province were selected for the study. After...
  9. CORESTA Meeting, Agronomy/Phytopathology, 2023, Cancun, APPOST 20

    Design and testing of sinusoidal curve variable frequency control system for circulating fan in bulk curing barn

    WANG Jianan(1); YIN Guangting(2); CHEN Xiaolong(2); SHEN Hongtao(2); DUAN Weidong(2)
    (1) College of Tobacco Science / Tobacco Harm Reduction Research Center, Henan Agricultural University, Zhengzhou, China; (2) China Tobacco Henan Industrial Co., Ltd., Zhengzhou, China
    Scientific control of wind speed between tobacco leaves can improve quality of tobacco after cured in bulk curing barn. Regarding the light colour and high power consumption caused by inaccurate control of the current circulating fan, and different...