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occurrence regularity of Major Damage Generations of Nilaparvata lugens(Stl) in Single Cropping Medium Rice Region in Sandu County of Guizhou Province

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Plant Diseases and Pests 2014年第2期5卷 4-9页

作者： Liu Tianlei Jin Daochao Yang Hong Ai Zhengxian Zhou Zhaoxia Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Region Institute of EntomologyGuizhou University Sandu Plant Protection Station

In order to clarify occurrence regularity of major damage generations of Nilaparvata lugens( Stl) in Sandu Shui Autonomous County( Sandu County for short),Guizhou Province,a karst single cropping medium rice region,the population dynamics of N. lugens were systematically studied using the methods of light trap and systematic field survey from 2009 to 2011. The results showed that the number of immigration generations caught by light trap and the actual population of N. lugens in fields were different among three years. The daily maximum trapping numbers of N. lugens amounted to 6 688 in 2009,which were 15. 3 and 2. 5 times of that in 2010 and 2011,respectively. The peak numbers in prediction nursery were 10 777,4 630 and 1 615 heads per hundred hills in 2009,2010 and 2011,respectively. The forth and fifth generations of N. lugens were the major damage generations in single cropping medium rice fields,and the initial immigration day was significantly related with primary-peak day. The occurrence degree of adults and nymphs of N. lugens varied with years and transplanting periods,and the peak days of N. lugens nymphs were from late July to early August in 2010 and 2011. The occurrence peaks of adults and nymphs in late transplanting paddy field were later than that in the early one. Meanwhile,the coexisted various growth periods of rice,due to time differences of transplanting,were conducive to inhabitation and reproduction of N. lugens. The population dynamics of spiders and Cyrtohinus lividipennis well synchronied with that of N. lugens,but predatory capacity of spiders and C. lividipennis was not enough to control N. lugens.

关键词： Nilaparvata lugens(Stl) Population dynamics Single cropping medium rice occurrence regularity

occurrence regularity and Prediction Model of Underground Pest Adults in Hangzhou District of China

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Plant Diseases and Pests 2013年第1期4卷 1-6,27页

作者： Wang Daoze Hong Wenying Wu Yanjun Wang Aijuan Wei Jiqian Hangzhou General Station of Plant Protection and Soil Fertilizer Agro-ecological Environment & Crop Protection Administrative General Station of Yuhang District

To improve forecasting and sustained control level of underground pests, trapping quantity of underground pests （black cutworm,mole cricket and scar-ab） by lamps and their field dynamics in Hangzhou district from 2005 to 2011 were investigated in the paper. The results showed that different pests had obvious differences in population dynamic. The black cutworm （Agrotis ypsilon） had several damage peaks （late May, late June and late July） and the moth amount in early period was relatively high. The mole cricket （ Gryllotalpa africana） had two damage peaks （late May to early July, early September to mid and late October）. The scarab （Anomala corpulenta） had one damage peak （late May to late June）. There were periodic changes in total quantity of underground pests among years, and the peak period appeared in the year of 2005, 2007 to 2009 and 2011, respectively. On this basis, temperature, humidity, rainfall and light were used as forecas- ting factors, using the method of stepwise regression, 19 factors with significant correlation were screened out and prediction models for occurrence quantity and oc- currence period of the three pests were established. By using accuracy degree judge model for verification, the score values of prediction model for occurrence quan-tity and occurrence period of the three underground pests were more than 58 and 70, which indicated that the historical coincident rate and prediction accuracy of estabhshed prediction models were good.

关键词： Hangzhou district Underground pests Population dynamic occurrence regularity Prediction model

occurrence regularity and Integrated Control Technology of Canker in Citrus

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Asian Agricultural Research 2021年第2期13卷 33-34,40页

作者： Zhijing WANG Liming WU Fang SONG Ligang HE Ce WANG Yingchun JIANG Institute of Fruit Tree and Tea Hubei Academy of Agricultural Sciences Wuhan 430064 China

Canker is a quarantine bacterial disease that seriously harms leaves,branches and fruits of citrus,leading to a decrease in the production and affecting the commodity and sales of *** canker has the characteristics of fast spreading speed and difficult radical *** the identification of symptoms and a summary of occurrence regularity,the integrated prevention and control technology for citrus canker is described in this article,in order to achieve effective prevention and control and reduce prevention and control cost.

关键词： Citrus canker Symptom recognition occurrence regularity Integrated prevention and control

occurrence regularity of Myzus persicae and Aphid- transmitted Virus Disease in Zhenyuan County of Guizhou

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Plant Diseases and Pests 2016年第4期7卷 19-22,26页

作者： Yang Jing Chen Jie Yang Rusong Tang Jun Zou Guangjin Yang Yan Zhenyuan Branch of Southeast Guizhou Tobacco Company Zhenyuan 557700 China Huangping Branch of Southeast Guizhou Tobacco Company Huangping 556199 China Southeast Guizhou Tobacco Company Kaili 556000 China

[ Objective] The paper provided a reference for establishment of effective prevention mechanism against aphids in Zhenyuan tobacco area. [ Melllod ] The initial population quantity of aphids in early spring, migration of winged aphids, occurrence regularity and damage status of Myzus persicae and aphid-transmit- ted virus （PVY ＋ CMV） were investigated in Zhenyuan County from 2014 to 2015 using 10-point checkerboard sampling method, yellow dish trapping method and 5-point sampling method. [ Result] The total amount of aphids in Brassica campestris was the largest among overwintering hosts, with an average of 18.44 speci- men/plant. The migration of winged aphids presented bimedal pattern; the population dynamics of wingless aphids presented unimodal pattern, and the occurrence peak was from May to June. [ Conclusion] Field control against M. persicae in tobacco fields should be conducted from mid May to early June.

关键词： Myzus persicae Migration Aphid-transmitted virus occurrence regularity

occurrence regularity and Control of Tobacco Mosaic Virus (TMV) in Wuxi Tobacco Area of China in 2011

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Plant Diseases and Pests 2013年第1期4卷 23-27页

作者： Li Zheng Xie Changsheng Xiang Yongguang Cao Anquan Zhang Dengrong Chen Mingfu Shuai Hong Zhu Lingyan Jing Haixia Wuxi Branch of Chongqing Tobacco Company

On the basis of general situation and new characteristics of tobacco mosaic virus （TMV） in Wuxi tobacco area in 2011, the paper expounded the objec-tive reasons of TMV via systemic investigation, field experiment and date sorting. Meanwhile, combined with mcteorological conditions and results of systemic inves-tigation, the study especially analyzed meteorological conditions, outbreak and prevalence regularity of TMV and control efficacy of chemical reagents against TMV. The results showed that climatic conditions were the main conditions affecting TMV. There were three occurrence peaks of TMV in 2011, as a result of meteorologi-cal conditions of the months from April to June. The peaks were concerned with a wide range of rainfall about half a month before, low temperature, high humidity and scant sunshine and temperature jump after rain. The results of control effects showed that the chemical reagents could obviously prevent TMV, but once tobacco plants were infected, spraying chemical reagents would not have effective control effect against TMV.

关键词： Tobacco mosaic virus (TMV) Hue-cured tobacco occurrence regularity -Chemical control

occurrence regularity of Tobacco Cutworm Moth (Spodoptera Litura) in Low-Altitude Tobacco Cultivation Areas in Lincang

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Plant Diseases and Pests 2012年第2期3卷 42-45,48页

作者： Mingwen YANG Xuebing ZHANG Ping YA Guiqing PENG Ping CHEN Jianjun YU Dongcheng ZHANG Lincang Agricultural Extension Station Lincang Branch of Yunnan Tobacco Company Zhenkang Branch of Lincang Tobacco Company

[ Objective ] The paper was to study the occurrence and damage regularity of tobacco cutworm moth （Spodoptera Litura Fabricius） in low-altitude area in Lincang city. [ Method] The adult sex attractant monitoring, field investigation of occurrence and damage, and observation of continuous generation development of natural populations were carried out in natural flue-cured tobacco fields. [ Result] In field growth period of flue-cured tobacco under low-altitude of 1 000 - 1300 m, tobacco cutworm moth occurred for 4 generations, the duration of each generation was about 33 d, and the main injurious generation was the third generation. [ Conclusion] The paper provided reference for comprehensive control of tobacco cutworm moth in the low altitude areas.

关键词： Low-altitude tobacco cultivation areas Tobacco cutworm moth occurrence regularity China

occurrence regularity and Control Research of Apple Early Defoliation Disease in West Sichuan Plateau

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Plant Diseases and Pests 2011年第5期2卷 25-27,68页

作者：杨文渊谢红江陈善波江国良陈栋涂美艳李靖孙淑霞四川省农业科学院园艺研究所四川成都610066 眉山职业技术学院农业技术系四川眉山620036

[ Objective ] The research aimed to discuss the occurrence regularity of apple early defoliation disease and control effects of fungicides in west Sichuan plateau. [ Method ] Apple early defoliation disease in west Sichuan plateau was systematically investigated during 2009 and 2011, and the control effects of different fungicides during different spraying periods were studied. [ Result] The species of pathogen mainly was Marssonina ma/i （ P. Henn）, accounting for 32.5%, Phyl-losticta Pirina Sa accounted for 29.9%, and Alternaria mali Roberts accounted for 25.7%. The field fluctuation regularity was as follows ： the disease generally be- gan in the mid-May and ended in early and middle October with only one damage peak during the whole year, the fluctuation had positive correlation with rainfall （ R2 =0.891 8 ＊＊）. Control test showed that 40% flusilazole had the best control effect （86.5%）, which was best to apply after anthesis. [ Conclusion ] The paper provided theoretical basis for the effective control against apple early defoliation disease.

关键词： Apple Early defoliation disease occurrence regularity Control effect China

occurrence regularity and Mating Rhythm of Overwintering Adults of Tessaratoma papillosa on Longan Tree

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Plant Diseases and Pests 2013年第1期4卷 10-12,32页

作者： Liu Jimin Huang Qichun Wei Ge Chen Zhenglin Huang Chaofu Wan Chunhui Jia Bao He Ningzu Lu Wen Termite Control Institute of Nanning House Property Administration Cash Crops Research Institute Guangxi Academy of Agricultural Sciences College of Agriculture Guangxi University

[ Objeodve ] The occurrence regularity and mating rhythm of overwintering adults of Tessaratoma papiUosa on longan tree were studied in the paper, so as to provide scientific reference for effective prevention and control against the pest. [Method] During the mating period of overwintering adults of T. papillosa, mating duration, occurrence regularity and mating rhythm of overwintefing adults within g8 h as well as their occurrence and mating status during April and June were observed. [Result] Mating duration of T. pap///osa adults for$ -9 h accounted for 18.2%, and duration for 10 -ll h and more than 13 h accounted for 54.5% and 27.3%, respectively. According to daily observation, the maximum adult quantity of T. papillosa adults appeared at 9：00 am, followed by 13：00 pm. There were two peaks （9：00 am and 15：00 pm） and troughs （6：00 am and 19：00 pro） for adult quantity of T. papiUosa and its mating pairs within 24 h as times changed. Mating pairs were positively correlated with observed adult quantity. Adult quantity and mating pairs increased since April 1, and reached the maximum value on April 6. Afterwards, they were gradually dropped down, and almost no adults of T. papiUosa were found after June 11. [Conclusion] The mating peak of T. papillosa adults was from April to May, and there were two mating peaks （9：00 am and 13：00 pm） and troughs （6：00 am and 19：00 pm） every day. Adults repeatedly mated and spawned, while mating usually lasted for 10 -11 h either during the daytime or at night.

关键词： Tessaratoma papillosa Overwintering-adult occurrence regularity Mating rhythm

occurrence regularity and Control Measures of Powdery Mildew in Strawberry

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Asian Agricultural Research 2020年第9期12卷 60-61,72页

作者： Hui DONG Li LI Jingfang FAN Li YANG Lei YANG Yanan LI Shijiazhuang Institute of Pomology Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050061China Plant Protection and Quarantine Station of Hebei Province Shijiazhuang 050035China

Powdery mildew is a major disease of *** harms both plants and fruits,seriously affecting the quality and yield of *** article briefly introduces the harms and occurrence regularity of powdery mildew in strawberry and summarizes the corresponding control measures,with a view to providing a certain scientific reference for the prevention and treatment of the disease.

关键词： Powdery mildew in strawberry Harm occurrence regularity Control measure