共查询到19条相似文献，搜索用时 156 毫秒
1.
为筛选对桔小实蝇Bactrocera dorsalis（Hendal）有高毒力的球孢白僵菌Beauveria bassiana菌株,本文选取了对双翅目蝇类有致病性的球孢白僵菌菌株12株（Bb1824、Bb1840、Bb1853、Bb1981、Bb1995、Bb2003、Bb268、Bb853、Bb886、Bb1035、Bb1205、Bb2264）,通过菌落生长形状观察、产孢量测定、孢子萌发率的测定的方法筛选出菌株营养生长速度快、产孢量大、孢子萌发率高的优势菌株6株（Bb886、Bb1035、Bb1824、Bb1981、Bb2003、Bb1840）;再通过生物测定的方法,在6株优势菌株中筛选出了对桔小实蝇幼虫感染率最高、死亡率最高、LT50最小的Bb886菌株,该菌株对桔小实蝇幼虫的感染率为86.7%,校正死亡率达89.2%,在孢子浓度为2×107个/mL时的LT50仅为5.18天。 相似文献
2.
不同球孢白僵菌菌株对星天牛幼虫的致病力 总被引：1，自引：0，他引：1
为筛选出可用于星天牛生物防治的高致病力菌株,测定了8株球孢白僵菌菌株(Bb Ma A-01、Bb MQ-04、Bb MQ-07、Bb QZ-01、Bb QZ-02、Bb YXTR-03、Bb TK-02、Bb XJ-11)的生长速度和产孢量及其对星天牛幼虫的致病力。结果表明:不同球孢白僵菌菌株的生长速度、产孢量和对星天牛幼虫致病力差异十分显著。采用浸渍法接种15 d后,不同球孢白僵菌菌株对星天牛幼虫累计致死率(幼虫死亡率)在70%~100%之间,其中Bb XJ-11、Bb QZ-02菌株对幼虫的累计死亡率最高,均达100%;且接种后星天牛幼虫的僵虫率(感染率)也分别高达90%、80%;致死中时(LT50)较短,分别为5.38 d、5.83d。研究结果表明Bb XJ-11、Bb QZ-02菌株对星天牛幼虫的致病力较强,同时2个菌株的生长速度快、产孢量高,故可作为防治星天牛的优良菌株加以推广应用。 相似文献
3.
4.
为探索球孢白僵菌Beauveria bassiana Bb 080717菌株对榕母管蓟马Gynaikothrips ficorum的毒力效果,进行了该菌对榕母管蓟马成虫和若虫的室内毒力测定.结果表明:接种后8d,该菌株4.5×108孢子/mL浓度对榕母管蓟马成虫的累计死亡率是86.77％,致死中浓度(LC50)是2.268 6×105孢子/mL,最短致死中时间是4.37 d;对若虫的累计死亡率是84.35％,致死中浓度(LC50)是2.468 4×105孢子/mL,致死中时间是4.53 d.说明球孢白僵菌Bb 080717菌株对榕母管蓟马具有很高的毒性,有良好的应用前景. 相似文献
5.
白僵菌与病毒、苏云金杆菌、溴氰菊酯混合防治木毒蛾的研究 总被引：12，自引：5，他引：7
通过应用白僵菌 (Bb)、木毒蛾核多角体病毒 (LxNPV)、苏云金杆菌 (Bt)和溴氰菊酯粉剂及其不同配比的混合粉剂对木毒蛾室内毒力测定和林间防治比较试验 ,筛选出Bb与LxNPV(2× 1 0 6PIB·g-1)、Bt(1 4 0× 1 0 8·g-1)和 0 0 5 %溴氰菊酯(D)粉剂 ,以 2∶1∶1∶1比例混合粉剂防治效果最好 ,平均效果达 92 1 % ,较 4种单剂防治具有明显的增效作用 ,为探索配制木毒蛾复合生化杀虫剂提供了科学的依据 ,生产推广应用前景广阔 相似文献
6.
7.
8.
用NaCl、KCl、NaNO3和KNO3四种盐处理盐生植物碱蓬(Suaeda salsa)幼苗，比较Na^ 、K^ 、和Cl的营养性和毒性。低浓度时，Na、K和Cl对碱蓬的生长都有促进作用，其中K元素的促进作用明显。高浓度处理时，Na、K和Cl的效应有差异，NaCl和NaNO3处理时，Na和Cl没有表现出明显的毒性，KCl和KNO3处理时，K和Cl表现出毒害现象，叶片的叶绿素含量降低和脯氨酸含量明显的升高，植株干枯或黄化。 相似文献
9.
白僵菌代谢提取物对美国白蛾毒性生测方法的研究 总被引：5，自引：0，他引：5
以美国白蛾幼虫为试虫，采用饲喂、口服、表皮接触和血腔注射4种生测方法测定了白僵菌代谢提取液的毒性。结果表明，4种生测方法代谢提取液均表现一定的毒性，血腔注射生测所表现的毒性最高。通过对着4种生测方法的比较分析，建议白僵菌的代谢物中毒素物质的生物测定首先采用血腔注射法生测。 相似文献
10.
黄山风景区亮壮异蝽病原真菌及高毒菌株筛选 总被引：1，自引：0，他引：1
该文对黄山风景区亮壮异蝽UrocheladistinctaDistant的病原真菌进行了详细的调查 ,共鉴定出 5种病原真菌 :球孢白僵菌Beauveriabassiana (Bals.)Vuill.、粉拟青霉Paecilomycesfari nosus (Holm .exGray .)Brown&Smith、蜡蚧轮枝孢Verticillumlecanii(Zimmermann)Viegas、芽枝状枝孢霉Cladosporiumcladosporioides(Fres .)deVries和一种顶孢霉Acremoniumsp .,其中球孢白僵菌为绝对优势种群 ,占 92 %。选用 10株不同来源的球孢白僵菌菌株对亮壮异蝽成虫进行了毒力测定 ,结果表明Bb35 7菌株毒力最强 ,是可用于林间防治的生产菌株 相似文献
11.
Jaime A. Ocampo-Hernández Patricia Tamez-Guerra Samuel Pineda Fernando Tamayo-Mejía Ariel Guzmán-Franco José I. Figueroa de la Rosa Ana Mabel Martínez 《Journal of pest science》2011,84(4):471-477
Entomopathogenic fungi represent excellent candidates for biological insecticides. Among the many entomopathogenic fungi, Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Clavicipitaceae) is one of the most promising species. Here, we report the results of infection studies performed using four B. bassiana native isolates (Bb37, Bb38, Bb40, and Bb45) compared with the commercial product Mycotrol® (strain GHA) on adult Mexican bean beetle Epilachna varivestis Mulsant (Coleoptera: Coccinellidae), one of the most important pests of bean production in Mexico. First, single concentration (1 × 108 conidia mL?1) assays were carried out using all isolates applied using an immersion method. Examinations at 10 days after inoculation indicated that isolates Bb37, Bb38, and Bb40 significantly reduced adult survival, causing 60–75% mortality compared to the commercial strain GHA (33%) and control (29%). Second, using two selected isolates (Bb37 and Bb40), the mean lethal concentration values (LC50) were estimated for third instar larvae and adult E. varivestis. The LC50 values for Bb37 and Bb40 isolates decreased 5.26-fold and 3.19-fold, respectively, in third instars compared with adults. However, such difference for Bb40 isolate was not significant. Finally, an experiment, to compare the median survival time (MST) values between third instar and adult E. varivestis, was conducted using Bb37 and Bb40 at 1 × 109 conidia mL?1. MST values were significantly reduced against larvae (87 and 100 h) compared with adults (130 and 134 h) by Bb37 and Bb40, respectively. We conclude that native isolates of B. bassiana represent an important alternative for the control of E. varivestis. However, to demonstrate its effectiveness under field conditions, detailed studies are needed. 相似文献
12.
《Forest Pathology》1974,4(1):61-64
Book reviwed in this article: Cowan , S. T.: A Dictionary of Microbial Taxonomic Usage Nelson , R. R. (Ed.): Breeding Plants For Disease Resistance Gray , T. R. G.; Williams , S. T.: Soil Micro-organisms Marsh , R. W Systemic Fungicides. Pathak , V. N.: Essentials of Plant Pathology. Radulescu , E.; Negru , A.; Docea , E.: Septoriozele din România A discussion on disease resistance in plants. by P. W. Brian and S. D. Garrett 相似文献
13.
《Forest Pathology》1997,27(6):409-415
Book reviewed in this article Carlile , M. J.; Watkinson , S. C: The Fungi. Hawksworth , D. L.; Kirk , P. M.; Sutton , B. C; Pegler, D. N.: Ainsworth & Bisby's Dictionary of the Fungi. Alexopoulos , C. J.; Mims , C. W.; Blackwell , M. (eds): Introductory Mycology. Butin , H.: Tree Diseases and Disorders. Hiratsuka , Y.; Langor , D. W.; Crane , P. E.: A field guide to forest insects and diseases of the prairie provinces. Tainter , F. H.; Baker , F. A.: Principles of Forest Pathology. 相似文献
14.
《Forest Pathology》1984,14(3):191-192
Book reviewed in this article: Ernst , W. H. O.; Joosse-van -Damme , N. G.: Umweltbelastung durch Mineralstoffe-Biologische Effekte . Neuere Erkenntnisse zur Walderkrankung aus internationaler Sicht. Forstwissenschaft-liches Centralblatt 103, H. 1. Schlösser , E. : Allgemeine Phytopathologie. Teufel , D.: Waldsterben, natürliche und kerntechnisch erzeugte Radioaktivität 相似文献
15.
《Forest Pathology》1986,16(1):61-65
Books reviwed in this article: Schubert , R.: Bioindikation in terrestrischen Ökosystemen . Foster , R. G.; Rovira , A. D.; Gock , T. W.: Ultrastructure of the Root-Soil Inter-face . Nienhaus , F.: Viren, Mykoplasmen und Rickettsien, Parasiten an der Schwelle des Lebendigen. Jülich W.: Die Nitchtblätterpilze, Gallertpilze . Windels , C. E.; Lindow , S. E. (eds.): Biological Control on the Phylloplane. Grosser , D.; Pflanzliche und tierische Bau-und Werkholzschädlinge. Spaar , D.; Kleinhempel , H.; fritzsche , R. (Hrsg.): Diagnose von Krankheiten und Beschädigungen an Kulturpflanzen. Diagnosemethoden. Deacon , J. W.: Introduction to Modern Mycology. Jennings , D. H.; Rayner , A. D. M. (Hrsg.): The ecology and physiology of the fungal mycelium. Biology of Dwarf Mistletoes: World Directory of Forest Pathologists . World Directory of Forest Pathologists . Compiled by H. O. Batzer and D. D. Skiiling 相似文献
16.
桉树营养状况与叶片营养诊断研究 总被引：24，自引：2，他引：24
本文研究了雷林１号桉、尾叶桉和柠檬桉一年和三年生植株养分浓度及养分积累量；叶片营养诊断的采样时间、诊断方法，并用临界值法和系统综合诊断法诊断桉树施肥“中试”区的营养状况。 相似文献
17.
Ayed Al Omary 《New Forests》2011,42(3):285-300
Plantation of open grazing lands with Pinus halepensis are the most widely used practices in afforestation and reforestation in Jordan and other semi-arid areas around the Mediterranean
Basin. The effect of aspect North (N), South (S), East (E) and West (W) and slope position (upper, middle, lower and valley
bottom) on growth of planted Aleppo pine, nutritional status, plantation on restoring, needle, forest floor, nutrients concentration
and soil properties were studied in Jubilee forest in Rakeen area, south of Jordan. Tree height was significantly higher in
W than N, S and E aspects which mainly due to better moisture and nutritional conditions. All growth parameters were obtained
on valley bottom were significantly higher than all aspect slope position combinations due to accumulation of run off and
depositions from upper towards middle, and finally in lower slopes. In general, pH and EC were significantly reduced and soil
organic matter was significantly improved by Allepo pine plantations compared to unplanted areas. West and N aspects as well
as valley bottoms showed better soil physical and chemical properties. 相似文献
18.
从林隙大小和林隙年龄2个方面初步研究了杨桦次生林经营采伐形成的林隙及其更新特征.结果表明:冠林隙面积<50 m2占7%,50～100 m2占21%,100～150 m2占36%,150～200 m2占29%,>200 m2占7%.28.6%的林隙呈圆形,71.4%的林隙呈椭圆形.椭圆形林隙中55%为南-北方向,30%为东北-西南方向,15%为东南-西北方向.林隙一般由7～10株山杨、白桦或山槐被伐后形成.林隙内更新幼苗的密度和生长状况优于非林隙林分.在林隙形成初期,灌木幼苗在林隙更新中占绝对优势,但随着林隙形成年龄的增加,灌木将逐渐丧失其优势,乔木的优势则逐渐上升.除50～100 m2林隙外,乔木幼苗的平均高和平均基径均大于灌木,但都在100～200 m2林隙内最大.各大小级林隙内更新的主要乔木中阳性树种占大多数,但优势种各不相同. 相似文献
19.
通过田间双因素试验设计研究了不同插穗基部下切口型（W）、不同扦插基质（P）对半枫荷扦插生根率、生根数的影响差异,通过田间正交试验设计研究了不同种类生根促进剂（C）、不同密度遮阳网（D）及不同木质化程度的插穗（E）对半枫荷扦插生根率、生根数及苗高的影响差异。试验结果表明：插穗基部下切口型采用双削面（W3）＋扦插基质采用各50%红心土和珍珠岩（P2）最好,平均生根率、生根数最高,平均生根率达到86.9%,平均生根数达11.9条;采用生根促进剂ABT-1#（C2）＋遮光率为50%的遮阳网（D1）＋半木质化的绿枝（E2）最佳,平均生根率达到89.6%,平均生根数达到12.6条,平均苗高达到22.8cm。 相似文献