EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Virulence and aggressiveness of single zoospore isolates of phytophthora fragariae


, : Virulence and aggressiveness of single zoospore isolates of phytophthora fragariae. Plant Pathology (Oxford) 35(3): 344-354

A system for scoring the virulence of isolates of Phytophthora fragariae based on a scale of root rot from 0 (no symptoms) to 5 (76-100% roots rotted)on a series of strawberry cultivars is described. Thirty-two single-zoospore isolates from one field site were compared by subjecting their root rot scores to cluster analysis and this grouped them into two major clusters equivalent to physiologic races B66-3 and B66-11. Different sub-clusters of isolates of race B66-11 produced different degrees of rotting on the same hosts. Apart from differences in virulence between the sub-clusters there was some evidence for differences in aggressiveness between isolates within sub-clusters. Increasing inoculum concentration by over 300-fold increased rotting by c. 25% but did alter the rankings of different isolate/host combinations. Repeated passage of isolates through cultivars of differing susceptibilities did not affect their pathogenicity.

(PDF 0-2 workdays service)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 006905524

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Davis, S. C.; Badiavas, E.; Rendon Pellerano, M.; Cazzaniga, A. L.; Mertz, P. M., 2000: The effect of a new hydrogel dressing for laser resurfacing. Wound Repair & Regeneration 8(4): 331, July-August

Salyanov V.I.; Evdokimov Yu M., 1991: Effect of micrococcal nuclease on superhelical dna molecules forming liquid crystalline dispersions. The effect of micrococcal nuclease on superhelical spherical DNA molecules pBR 322 was studied. The molecules form liquid crystalline dispersions in water-salt solutions containing polyethylene glycol [PEG]. Experiments were carried out with micro...

Reddiah K., 1968: Pseudomacrochiron stocki new genus new species a cyclopoid copepod associated with a medusa 3 new combinations dactylometra quinquicirrha. Crustaceana (Leiden) 16(1): 43-50

Feldblum, S.; Arnaud, S.; Simon, M.; Rabin, O.; D'arbigny, P., 1998: Gacyclidine A potent neuroprotective agent in rat spinal cord injury. Society for Neuroscience Abstracts 24(1-2): 1727

Waggle, D. H.; Lambert, M. A.; Miller, G. D.; Farrell, E. P.; Deyoe, C. W., 1967: Extensive analyses of flours and millfeeds made from nine different wheat mixes. 2. Amino acids, minerals, vitamins, and gross energy. Values are given for 17 amino acids, 15 mineral elements, gross energy and 7 vitamins, betaine and choline. Essential amino acids were highest in germ, lowest in flour; minerals generally were highest in bran, lowest in flour; vitamins were higher...

Ito, Y., 1963: Six newly recorded species of tarsonemid-mites in Japan. Six unrecorded mites of the family Tarsonemidae in Japan were collected from various plants, and their morphological features were examined. The spp. are, Tarsonemus confusus, T. scaurus, T. setifer T. smithi, T. occidentalis, Daidalotarsonemus te...

Luco, J. V., 1963: Neuronal bases of plasticity Symposium on the neurophysiology of learning, Ribeirao Preto, Brazil, 1961. Acta Physiol Latino Amer 13(1): 62-63

Wilde, J. De, 1971: Physiology and biochemistry of insect diapause. International Congress of Entomology 13th Moscow 1968 Trudy: 460-461

Pettis, J. S.; Higo, H. A.; Pankiw, T.; Winston, M. L., 1997: Queen rearing suppression in the honey bee: Evidence for a fecundity signal. Previous studies have shown that a pheromone produced in the honey bee (Apis mellifera L.) queen's mandibular glands suppresses the rearing of new queens. The present studies investigated the existence of an as-yet unidentified, brood-associa...

Bonhomme-Florentin, A., 1983: Biohydrogenation des acides gras insatures de chloroplastes, par les protozoaires et les bacteries du contenu du caecum de Cheval. Archiv fuer Protistenkunde, 1274: 399-404