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1.
<正>刺蛾类是为害柞树等林木的重要害虫.1964年以来,在辽宁地区发现为害柞树的刺蛾有20余种,大发生时常将柞叶食光,严重影响柞蚕生产.笔者曾对数种刺蛾进行生物学观察和防治试验.本文仅就国内尚未见报道的迷刺蛾Miresina banghaasi(Hering et Hopp)和客刺蛾Ceratonema retractatum Walker的观察结果报告如后.分布与寄主根据现有记录,迷刺蛾分布在辽宁、四川等省.主要食害蒙古栎(Quercus mongolica), 相似文献
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在分析导致柞园质量下降原因的基础上,提出了通过加强建设提高柞园单位面积产叶量、通过生物和工程措施防治柞园水土流失、通过实施综合技术优化柞园质量、依托政策和法规提升柞园建设与管护力度等提高柞园质量和养蚕功能的措施. 相似文献
3.
刺蛾是一类为害茶园的新型害虫,虫害爆发时严重影响茶叶产量和质量,调查发现南昌地区茶园刺蛾类害虫主要有茶刺蛾、扁刺蛾、褐刺蛾、丽绿刺蛾、黄刺蛾和龟形小刺蛾等.较系统地阐述了南昌地区茶园刺蛾发生及综合防治技术,旨在为茶园刺蛾的有效防治提供参考. 相似文献
4.
刺蛾科昆虫是柞园栎树林中的重要害虫类群。克隆了栎树林中主要刺蛾科昆虫的线粒体细胞色素C氧化酶亚基Ⅰ基因(mtDNA COⅠ,Gen Bank登录号:KP727647~KP727664),以此作为供试刺蛾科昆虫的DNA条形编码基因分析其碱基组成特点和遗传进化规律,探讨将其应用于栎树林中刺蛾科害虫的分类鉴定和系统进化关系研究的可行性。刺蛾科昆虫各物种间的mtDNA COⅠ基因碱基组成差异不明显,碱基T、C、A、G的平均含量分别为38.0%、16.2%、30.7%和15.1%,AT含量为68.7%,显著高于GC含量(31.3%),表现出明显的AT使用趋向性;碱基明显倾向于使用T(AT偏倚度为-0.106 26),具有较弱的C偏好性(GC偏倚度为-0.035 14),不同物种间该基因碱基T使用偏好程度差异较大。刺蛾科昆虫mtDNA COⅠ基因碱基变异率为26.64%,碱基颠换明显高于转换(R值为0.75)。刺蛾科昆虫各物种mtDNA COⅠ基因的平均进化率为11.5%,进化率最大的发生在锯纹岐刺蛾Austrapoda seres与中国扁刺蛾Thosea sinensis间,进化率最小的发生在黄刺蛾Monema flavescens与梨娜刺蛾Narosoideus flavidorsalis之间。在刺蛾科昆虫mtDNA COⅠ基因的系统进化树中,中国绿刺蛾Parasa sinica和中国扁刺蛾Thosea sinensis聚在一起形成一个单系,其他物种聚在一起形成另外一个单系。以上结果表明,mtDNA COⅠ基因可作为DNA条形编码用于栎树林刺蛾科害虫的分类鉴定和系统进化研究。 相似文献
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通过对危害桑树、果树和园林树木的褐刺蛾的分布与危害、形态特征、生物学特性、桑褐刺蛾幼虫致病物质成分的分析以及褐刺蛾质型多角体病毒研究总结,提出了刺蛾类害虫发生与防治的措施,表明铲除越冬茧、摘除虫叶、灯光诱杀是据其生物学特性制定的有效农业防治措施。生物治虫、天敌保护是防除刺蛾的必然趋势。喷雾法、打孔注药法构成了化学防治的核心内容。以化学防治为主体,农业防治和生物防治为配合的防治技术是目前行之有效的综合治理措施。 相似文献
6.
柞园食叶害虫不仅影响柞树的生长发育,而且与柞蚕争食,严重影响柞蚕的产量和质量。通过调查确定了柞园食叶害虫的主要种类,依据害虫种类提出科学合理的防治建议。 相似文献
7.
为了解市售的8种农药的残毒期,进行了柞园施药后的柞蚕放养试验。结果表明:敌敌畏对柞蚕幼虫残毒期为7 d、烯啶虫胺为15 d、毒死蜱为20 d、敌百虫和吡虫啉为25 d左右、阿维菌素为60 d以上、四氯虫酰胺和高效氯氰菊酯为90 d以上。在柞园及柞园周边严禁使用阿维菌素、四氯虫酰胺和高效氯氰菊酯,慎用吡虫啉、敌百虫、毒死蜱和烯啶虫胺,可将按要求稀释后的敌敌畏作为柞园食叶害虫的防治药剂。 相似文献
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柞园又称柞蚕场或柞坡,柞园建设是发展柞蚕生产的基础和前提,柞园建设影响柞蚕营养条件及山区生态环境。柞树不仪是柞蚕的饲料树种,也是我幽重要的植被资源、绿化树种,同时还是…区水土保持的优良树种。 相似文献
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通过对河南省柞园柞树树型种类调查和对柞园的轮茬修剪、不同修剪方法养蚕的对比试验,探讨适合技术操作和放养柞蚕的理想树型,为河南省柞园的科学修剪提供理论依据。 相似文献
10.
介绍了辽宁蚕区栎粉舟蛾的发生历史及现状,简述了栋粉舟蛾的生物学特征及生活习性,分析了化学防治及生物防治的不足,提出应根据当地实际,采取综合措施进行防治。 相似文献
11.
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%). Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada. 相似文献
12.
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
13.
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection. 相似文献
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In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
16.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated. Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively. 相似文献
17.
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
18.
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%). Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada. 相似文献
20.
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario. Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously. 相似文献
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