一类具有非线性传染率流行病模型的定性分析

研究了一类具有非线性传染率βI^pSq的SIQR传染病模型,确定了各类平衡点存在的条件阈值,研究了各坪徽的稳定性,最后讨论了模型的Hopf分豉觋象,并证明了当0〈P≤1时地方病平衡点的全局稳定性     

浅析动物检疫监督存在的问题与对策

本文描述了动物检疫和监督执法工作在动物疫病防控、维护社会稳定中的重要性,并根据1年的基层工作经验,以科学发展观为指导,分析了动物检疫监督执法工作中存在的问题,提出了相应的建议与对策。     

植物害虫检疫处理技术研究进展

介绍国内外植物检疫各种处理技术应用现状及其优缺点,探讨辐射处理技术和气调处理技术的研究方向和发展趋势。     

缅甸入境仓储甲虫种类的研究

1983～1989年对缅甸入境动植物产品检查结果,鉴定出仑储甲虫25科、110种。其中,外检对象3种,危险性害虫4种,国內尚未分布的害虫16种。     

呼和浩特市地区鸡白痢综合防制措施

本文通过对呼和浩特市地区养鸡业发展状况及鸡白痢情况的调查,采用全血平板凝集试验,结合单抗协同凝集试验检疫净化鸡场,提出了呼和浩特市地区鸡白痢的综合防制措施使鸡白痢的阳性检出率由15.76％下降到0.34％以下。为呼市地区各鸡场及全国养鸡业鸡白痢的净化与防制提供了科学措施。     

Ustilospores of Tilletia ehrhartae, a smut of Ehrharta calycina, are common contaminants of Australian wheat grain, and a potential source of confusion with Tilletia indica, the cause of Karnal bunt of wheat

Australian wheat consigned for export from Australian ports was surveyed in March 2004 using a national diagnostic protocol for detection and identification of Tilletia indica . No ustilospores of T. indica were detected, confirming previous surveys which have failed to detect T. indica in Australia. However, the survey detected moderate levels of the common smuts Tilletia caries (syn. Tilletia tritici ), Tilletia laevis and Urocystis agropyri , and very low levels (average fewer than six ustilospores per 150 g sample) of an unidentified dark, tuberculate-spored Tilletia in ≈ 60% of samples tested. Comparison with herbarium specimens enabled identification of the majority of the tuberculate ustilospores as Tilletia ehrhartae , a smut fungus known to infect only Ehrharta calycina (perennial veldt grass) and which is common in southern Australia. A smaller number of tuberculate smut ustilospores were identified as Tilletia walkeri , a smut of Lolium spp. recorded in Australia but apparently uncommon. Both T. ehrhartae and T. walkeri bear sufficient resemblance to T. indica for misidentifications to be possible where only a very few ustilospores are seen, although T. ehrhartae ustilospores are always <25  µ m in diameter. The frequent presence of ustilospores of both T. ehrhartae and T. walkeri as contaminants of Australian wheat grain exports has significance for diagnosticians testing Australian export wheat, as it demonstrates the potential for tuberculate ustilospores of species other than those covered in existing diagnostic protocols to be misidentified as T. indica . This paper describes T. ehrhartae in detail, and provides criteria for its differentiation from T. indica , T. walkeri and some other species.     

小麦矮腥燃（TCK）传入中国及其定殖的风险分析研究进展

由Tilletia controversa Kühn(TCK)引起的小麦矮腥黑穗病是对小麦危害极大的一种病害。国际上有15个国家包括中国把其列为检疫对象。基于中美小麦贸易和检疫的需要,对小麦矮腥黑穗病在我国传入和定殖的风险研究一直是两国科学家的研究热点。本文系统介绍了此病害在风险分析方面的研究进展。     

浅谈松材线虫病的防治

松材线虫病为世界上最具危害性的森林病虫害之一,被称为松树的"癌症",及时发现该病的发生相当困难,一般情况下,无枯死树出现前,很难发现和诊断松材线虫病的发生,一旦发现其危害程度已相当严重,发生面积数公顷,甚至数十公顷到数百公顷,对除治工作的开展带来了相当大的困难。文章针对松材线虫病及其防治方法进行论述,阐述了松材线虫病发生发展规律,对松材线虫病疫情不能及时发现的诸多因素和发现途径进行分析,提出的一系列建议性防治措施,以供参考。     

荔枝蒂蛀虫辐照检疫处理的研究

应用γ-射线辐照检疫处理对荔枝蒂蛀虫Conopomorpha sinensis的研究结果表明，果中幼虫经0．2kGy处理后，幼虫死亡率达68．75；经0．25kGy处理后，仅有一头幼虫存活并能结茧化蛹，但不能羽化为成虫，经0．30，0．35和0．40kGy处理后，供试幼虫全部死亡，而对照死亡率仅为1．8％－2．2％，其余幼虫化蛹并羽化成虫虫，辐照处理后对荔枝果实的保鲜试验结果表明，在供试的几个辐照剂量，处理后7天，所有处理中的果率均比对照组低，0．35％kGy处理组保鲜效果最显著。0．25kGy γ-射线辐照可作为荔枝蒂蛀虫幼虫的检疫处理措施。     

滇南杧果生产现状及害虫名录

本文简介滇南杧果主产区的栽培现状和为害杧果的246种害虫名录。