Nematologica最新文献_第10页

Criconema Paradoxiger (Orton Williams, 1982) Raski & Luc, 1985: Cuticle Ultrastructure and Revalidation of the Genus Amphisbaenema Criconema Paradoxiger(奥尔顿·威廉姆斯,1982)Raski &吕克·1985:表皮超微结构和属Amphisbaenema重新生效

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/004525996X00028

W. Decraemer, J. Baldwin, C. Eddleman, E. Geraert

引用次数: 2

Tylenchidae from Buenos Aires, Argentina.

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/187529296X00058

M. Torres, E. Geraert

引用次数: 6

Revision of the Genus Tylencholaimus De Man, 1876. General Discussion and Key To the Species 1876年修订的德曼田鼠属。一般讨论和物种的关键

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/004525996X00046

R. P. Santiago, A. Coomans

引用次数: 2

Population dynamics and damage potential of the root-lesion nematode, Pratylenchus bolivianus, on Alstroemeria 黑桫椤根损线虫种群动态及危害潜力

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/187529296X00076

J. Amsing

{"title":"Population dynamics and damage potential of the root-lesion nematode, Pratylenchus bolivianus, on Alstroemeria","authors":"J. Amsing","doi":"10.1163/187529296X00076","DOIUrl":"https://doi.org/10.1163/187529296X00076","url":null,"abstract":"In a 40-week pot experiment, population development and reproduction of Pratylenchus bolivianus on Alstroemeria cv. Jubilee were investigated. Thirty-two weeks after planting in soil initially infested with 24 P. bolivianus/ 100 cm 3 soil, nematode populations in subterranean plant parts and soil reached maxima of 3,350/10 g and 266/ 100 cm 3 , respectively, giving an overall reproduction factor of x59. In a 2-year pot experiment, population development, reproduction and crop damage were investigated in relation to four initial inoculum levels (Pi): 0, 24, 1 19 and 468 nematodcs/ 100 cm 3 soil. After two years the lateral roots of the infested treatments contained about 20,000 P. bolivianus/10 g and the soils of Pi=24, 119 and 468 were infested with 299, 485 and 1,284 P. bolivianus/ 100 cm 3 and resulted in reproduction factors of ×97.1, ×23.8 and ×3.4, respectively. All infested treatments affected root growth and flower production, with reductions in root weight, number of flowers, weight/flower, length of flower stem and weight/cm of flower stem ranging from 18-75%, 8-17%, 16-22%, 10-13% and 10-17%, respectively. The greatest reductions were found in the treatment with the highest Pi. Although P. bolivianus caused modcrate yield losses, the damage threshold density is less than 24 P. bolivianus/100 cm 3 soil at planting. No specific leaf symptoms were noticed, but lesions on subterrancan stem parts were related to infection with P. bolivianus.","PeriodicalId":18988,"journal":{"name":"Nematologica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73518993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Dispersal and host-finding ability of entomopathogenic nematodes at low temperatures 昆虫病原线虫在低温下的传播和寻宿主能力

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/004325996X00084

W. Steiner

{"title":"Dispersal and host-finding ability of entomopathogenic nematodes at low temperatures","authors":"W. Steiner","doi":"10.1163/004325996X00084","DOIUrl":"https://doi.org/10.1163/004325996X00084","url":null,"abstract":"To enhance the control of sedentary, subterranean insect pest species like Otiorhynchus sulcatus, 19 new alpine isolates of entomopathogenic nematodes were screened for infectivity at 9°C. For this purpose, nematode dispersal was studied in the presence of late instar Galleria mellonella and O. sulcatus, using a T-tube choice system filled with moist sand. For each isolate five characteristics were recorded: migration rate, average distance travelled, host-finding ability, parasitisation rate, and invasion rate. As expected, most isolates accumulated in the host compartments. The rank sum of the isolates, calculated according to the ranks attained for each of the five characteristics, classified seven Steinernema kraussei before the first S. feltiae. However, no single isolate was clearly the most infective. Steinernema sp. 1, Heterorhabditis CH-H-FLU91, and the commercially available S. feltiae OBS III yielded lowest scores. They are considered unsuitable control agents at low temperatures. The locomotory activity of the nematodes in dispersal assays with G. mellonella was significantly correlated with their efficacy at 8.5± 1°C against O. sulcatus in pot experiments. This indicates that T-tube choice experiments as performed in this study represent a meaningful tool for selecting cold-active nematodes. In supplementary dispersal experiments with larvae of Melolontha melolontha, biological control-performance of the four nematode species tested was meagre.","PeriodicalId":18988,"journal":{"name":"Nematologica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88462587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Culture conditions for Xenorhabdus and Photorhabdus symbionts of entomopathogenic nematodes 昆虫病原线虫的异食和光食共生体的培养条件

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/187529296X00139

Genhui Chen, P. Maxwell, G. B. Dunyhy, J. M. Webster

引用次数: 36

Three New Species of Hemicycliophora De Man, 1921 From India 标题印度半环莲三新种，1921

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/187529296X00030

P. F. Rahaman, I. Ahmad, M. S. Jairajpuri

引用次数: 3

Pratylenchus loosi from pasture grasses in central Florida 佛罗里达中部牧场草地上的松毛虫

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/004325996X00020

R. Inserra, L. Duncan, N. Vovlas, P. Loof

引用次数: 13

Burrows of Marine Nematodes as Centres for Microbial Growth 作为微生物生长中心的海洋线虫穴居

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/004425996X00056

P. Jensen

引用次数: 26

Virulence of Canarian Populations of Potato Cyst Nematodes (Globodera Spp.) 马铃薯囊肿线虫加那利种群的毒力分析

Nematologica Pub Date : 1996-01-01 DOI: 10.1163/004325996X00048

J. A. González, M. Phillips, D. Trudgill

{"title":"Virulence of Canarian Populations of Potato Cyst Nematodes (Globodera Spp.)","authors":"J. A. González, M. Phillips, D. Trudgill","doi":"10.1163/004325996X00048","DOIUrl":"https://doi.org/10.1163/004325996X00048","url":null,"abstract":"The virulence spectrum of the potato cyst nematodes (PCN), Globodera pallida and G. rostochiensis, from the Island of Tenerife was assessed and compared with that found in Europe. Within the G. rostochiensis populations, all the Canarian populations, with the exception of one (R2), were avirulent to the H1 resistance gene and therefore belong to the virulence group Ro1/Ro4. Within the G. pallida populations from Tenerife it was apparent that the virulence gene which overcomes the H2 resistance gene is present only at a low frequency. Four populations, P4, P7, P8 and P13, would be classified as pathotype Pa1. A wide range of variation in virulence against clones derived from S. vernei was observed, indicating a continuum of virulence, rather than discrete pathotypes. There was some correlation between the fitness of the populations on the hosts derived from S. vernei and those with no resistance, but less correlation between virulence on the ex-S. vernei clones and one derived from ex-S. tuberosum ssp. andigena CPC 2802. The reproduction of the G. pallida populations on three ex-S. vernei clones also indicated that increasing resistance is predominantly additive and that the nature of virulence towards the three ex-S. vernei clones tested is similar. The differences in the multiplication of the populations on a particular clone may reflect the number of resistance genes present in the clone. A clone derived from ex-S. tuberosum ssp. andigena CPC 2802 was comparatively uniformly resistant to all the populations. Its resistance appears to be different from that in the ex-S. vernei clones and to interact with at least in part, different genes in G. pallida for virulence. The nature of resistance in the different clones tested and aspects concerning the epidemiology of potato cyst nematodes are discussed.","PeriodicalId":18988,"journal":{"name":"Nematologica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77607445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5