热带农业科学
熱帶農業科學
열대농업과학
CHINESE JOURNAL OF TROPICAL AGRICULTURE
2015年
2期
57-61
,共5页
张建春%张光勇%陈伟强%孙寅虎%邓成菊%李芹%刘学敏%杨绍琼%王晓燕%黄绍忠
張建春%張光勇%陳偉彊%孫寅虎%鄧成菊%李芹%劉學敏%楊紹瓊%王曉燕%黃紹忠
장건춘%장광용%진위강%손인호%산성국%리근%류학민%양소경%왕효연%황소충
红河流域%木薯细菌性枯萎病%动态研究%病情指数%海拔
紅河流域%木藷細菌性枯萎病%動態研究%病情指數%海拔
홍하류역%목서세균성고위병%동태연구%병정지수%해발
Honghe Valley%cassava bacterial blight%epidemic dynamics%disease index%altitude
采用定点监测、分级调查法对红河流域不同区域的木薯细菌性枯萎病发生情况进行研究。结果表明：(1)木薯细菌性枯萎病在红河流域进入雨季后(5月)开始发病,整个雨季中(5～9月)病害发生较为严重,尤其是进入夏季后温度满足病原菌的发病条件时,病情指数变化曲线和降雨量曲线出现了同升、同降的现象。(2)同一海拔高度下,病情指数呈现出下游大于上游和中游,而危害率则出现相反的趋势,250～300 m海拔观测点的病情指数大小顺序为下游(2.03)＞中游(1.96)＞上游(1.77),危害率为下游(64.57%)＜中游(66.86%)＜上游(70.00%)；450～500 m海拔观测点的病情指数大小顺序为下游(2.01)＞中游(1.77)＞上游(1.76),危害率为下游(64.57%)＜中游(66.29%)＜上游(69.14%)。(3)同一区域则表现出低海拔地区的病情指数和危害率均高于高海拔地区。
採用定點鑑測、分級調查法對紅河流域不同區域的木藷細菌性枯萎病髮生情況進行研究。結果錶明：(1)木藷細菌性枯萎病在紅河流域進入雨季後(5月)開始髮病,整箇雨季中(5～9月)病害髮生較為嚴重,尤其是進入夏季後溫度滿足病原菌的髮病條件時,病情指數變化麯線和降雨量麯線齣現瞭同升、同降的現象。(2)同一海拔高度下,病情指數呈現齣下遊大于上遊和中遊,而危害率則齣現相反的趨勢,250～300 m海拔觀測點的病情指數大小順序為下遊(2.03)＞中遊(1.96)＞上遊(1.77),危害率為下遊(64.57%)＜中遊(66.86%)＜上遊(70.00%)；450～500 m海拔觀測點的病情指數大小順序為下遊(2.01)＞中遊(1.77)＞上遊(1.76),危害率為下遊(64.57%)＜中遊(66.29%)＜上遊(69.14%)。(3)同一區域則錶現齣低海拔地區的病情指數和危害率均高于高海拔地區。
채용정점감측、분급조사법대홍하류역불동구역적목서세균성고위병발생정황진행연구。결과표명：(1)목서세균성고위병재홍하류역진입우계후(5월)개시발병,정개우계중(5～9월)병해발생교위엄중,우기시진입하계후온도만족병원균적발병조건시,병정지수변화곡선화강우량곡선출현료동승、동강적현상。(2)동일해발고도하,병정지수정현출하유대우상유화중유,이위해솔칙출현상반적추세,250～300 m해발관측점적병정지수대소순서위하유(2.03)＞중유(1.96)＞상유(1.77),위해솔위하유(64.57%)＜중유(66.86%)＜상유(70.00%)；450～500 m해발관측점적병정지수대소순서위하유(2.01)＞중유(1.77)＞상유(1.76),위해솔위하유(64.57%)＜중유(66.29%)＜상유(69.14%)。(3)동일구역칙표현출저해발지구적병정지수화위해솔균고우고해발지구。
Study of Cassava bacterial blight (Xanthomonas campestris pv.manihotis Starr) was made in different regions of Honghe Valley with Fixed-point monitoring and hierarchical investigation. The result shows. (1) Cassava bacterial blight will begin onset in Honghe Valley when it enter the rainy season (May). Whole rainy season (May-September) is the most serious infection period. Especially, when the temperature is high enough to meeting incidence conditions after entering summer, disease index and precipitation are direct proportion.(2)Under the same altitude, the number of disease index of downstream is more than which of upstream and midstream as the same elevation. The study sites with 250~300 meters above sea level observation show disease index: downstream (2.03)> midstream (1.96)> upstream (1.77), and hazard ratio: downstream (64.57%)< midstream (66.86%) < upstream (70.00%); The study sites with 450-500 meters above sea level show disease index of downstream (2.01) > midstream (1.77)> upstream (1.76), while the hazard rate: downstream (64.57.%)< midstream (66.29%) < upstream (69.14%). (3) The same area show the disease index and hazard rate of the low-altitude are higher than which of high-altitude areas.
