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  • 1
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 4 (1961), S. 415-430 
    ISSN: 1871-4528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 59 (1953), S. 1-8 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary Though bulbs are not grown in soil infested withH. rostochiensis in the Netherlands, a method has been developed which gives complete destruction of adhering cysts of this eelworm, without damaging the bulbs. Some organic mercury compounds, which are regularly used as dips in controlling fungus diseases of bulbs, proved to be effective againstH. rostochiensis also. With Aaventa a complete kill ofH. rostochiensis was obtained using 1/4% for 6 hours, 1/2% for 3 hours and 1% for 1 hour (tables 1 and 2). These lethal doses did not affect the germinative and productive power of the tested bulbs, viz., 2 varieties of daffodil, 4 of hyacinth, 1 of iris, 1 of crocus, 3 of tulip and 2 of gladiolus. The only exception was the tulip variety Red Emperor (table 3f), which is an exceptionally susceptible variety in several respects. A comparison of Aaventa with the more common commercial bulb dips proved that Aabulba was also useful and even better than Aaventa (tables 6a-d). From former experience we conclude, that Aabulba is also, not phytocidal to bulbs in doses completely lethal toH. rostochiensis.
    Notes: Samenvatting Hoewel op metH. rostochiensis besmette grond in Nederland geen bloembollen verbouwd worden, is een ontsmettingsmethode ontwikkeld waarbij aanhangende cysten van dit aaltje worden gedood zonder de bollen te schaden. Enkele organische kwikverbindingen, die geregeld worden gebruikt als bloembolontsmetters ter bestrijding van schimmelziekten, bleken ook goed werkzaam tegenH. rostochiensis. Bij Aaventa bleek dompeling in 1/4% gedurende 6 uur, 1/2% gedurende 3 uur en 1% gedurende 1 uur juist afdoende (tabellen 1 en 2). Deze voorH. rostochiensis dodelijke concentraties bleken zonder bezwaar verdragen te worden door alle onderzochte soorten bloembollen, namelijk 2 variëteiten narcis, 4 variëteiten hyacinth, 1 variëteit iris, 1 variëteit crocus, 3 variëteiten tulp en 2 variëteiten gladiool. De enige uitzondering was de tulpenvariëteit Red Emperor (tabel 3f), die echter ook in andere opzichten sterk afwijkt van het normale tulpensortiment. Bij vergelijking van Aaventa met de gebruikelijke bloembolontsmetters bleek Aabulba eveneens goed bruikbaar en zelfs beter dan Aaventa (tabellen 6a-d). Op grond van vroegere ervaringen wordt aangenomen, dat ook Aabulba niet phytocide is bij de voorH. rostochiensis dodelijke doses.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 59 (1953), S. 207-216 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary and conclusions 1. In the Netherlands already seven differentParatylenchus strains resp. species have been found, but probably none of them is identical with the originalP. macrophallus (de Man, 1880). One remarkable strain is described asP. goodeyi n. sp.; the other are provisionally headed under known species. 2. Spear length proved to be a useful specific character in addition to shape of head and tail in all strains encountered so far in this country. The presence of ♂♂ and the presence of a spear in ♂♂ also varied consistently between strains. α and β may show great variation when maturing ♀♀ swell considerably, as inP. goodeyi. Lateral vulva membranes, as indicated byThorne & Allen (1950), were always present with the ♀♀ and a thick, anal sheath with dorsal extension with the ♂♂ and a thick, anal sheath with dorsal extension with the ♂♂, so that these characters may be generic. The same was true for the presence of lip annules and of a lateral field with 4 lines. 3. Goodey's redescription ofP. macrophallus in 1934 is probably based on a mixture of species. A similar mixture is met with in the Netherlands and analysed in this paper. 4. Some described species ofParatylenchus may be synonyms of others, but in the case ofP. macrophallus the present synonymy has probably gone too far. The genus evidently needs an over all revision, including the description of several commonly occurring new species.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 57 (1951), S. 52-64 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 59 (1953), S. 95-100 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Heterodera cruciferae is found in the Netherlands in five different locations, living on cabbage, rape and rapeseed, whereas beets are not attacked. ThisHeterodera is distinguished from nearly all otherHeterodera's known in Europe by its small, red brown, roundish lemon-shaped cysts and its short, thick larvae (Fig. 1, 2, 3, 5). The only exception isHeterodera humuli, which has however a thinner cyst wall of a lighter colour with a conspicuous, coarse, irregular punctation and larva stylets with distinctly forward-pointing knobs (Fig. 7, 8). The males are redescribed; they have 5–7 lip annules and three teeth on each spiculum tip (Fig. 4). Population density and type of damage with culture of rape seem to be about the same as with beet sickness caused byH. schachtii (Fig. 6). In the most important cabbage areaH. schachtii plays a more important role thanH. cruciferae. With both eelworms, an advisory service based on soil sample examinations would probably be useful for the culture of cruciferous crops.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 59 (1953), S. 104-104 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 59 (1953), S. 149-152 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Ditylenchus radicicola (Greeff, 1872)Filipjev 1936, has been found since 1950 in 75% of the Netherlands' old meadows as a generally distributed parasite on grass roots. Additional data on the morphology of the eelworm are given. Eleven grass varieties were found to be attacked under natural conditions; 7 of them are new host plants. Damage in our meadows was not observed. However this eelworm is considered a noxious parasite of cereals abroad and in view of the economic importance of grassland in our country further information would be desirable.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 59 (1953), S. 245-251 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les différences morphologiques entre les espèces de Heterodera formant des kystes sont brièvement discutées. L'examen d'un grand nombre de populations et l'expérience acquise dans la pratique et dans le service de renseignements ont démontré que les 6 espèces principales des Pays-Bas peuvent être divisées suivant la forme du kyste. Il est plus difficile de décrire ces différences que de les observer in vivo (Fig. 1à 5). La longueur de la queue des larves (c. à d. la partie de la queue depuis la pointe jusqu'à la cavité du corps) et d'autres caractéristiques encore constituent des marques de valeur. La clef suivante peut servir pour la détermination pratique: 1. Kystes piriformes, c. à d. avec abdomen arrondi... Kystes en forme de citron, c. à d. avec abdomen se terminant en pointe allongée, tandis que la vulve se trouve au sommet du cône... 2. Kystes, sans le cou, ovales; l'anus et la vulve l'un et l'autre dans de larges taches claires de la paroi du kyste; queue des larves très longue et mince ...H. punctata. Nématode des graminées Kystes, sans le cou, sphériques; vulve dans une large tache claire mais l'anus à peine perceptible; queue des larves une peu plus longue que le stylet ...H. rostochiensis. Nématode de la pomme de terre. 3. Kystes surprenant par leur petitesse, ventrus, teinte rouge brun; larves trapues et épaisses (rapport longueur: largeur±20) ... ...H. cruciferae. Nématode du chou. Kystes ne surprenant pas par leur petitesse, larves pas trapues et épaisses 4. Kystes assez élancés en forme de citron sans pointe mais abdomen pas ou à peine en pointe allongée; teinte rouge brun luisante; queue des larves longue et mince (±11/2×la longueur du stylet)... ...H. goettingiana. Nématode du pois. Kystes avec le cône de la vulve en pointe allongée... 5. Kystes larges renflés jusqu'à proximité de la vulve, cône de la vulve petit, paroi du kyste le plus souvent brun foncé ou noir; larves avec longue queue (±11/2×la longueur du stylet)... ...H. avenae=H. major. Nématode de l'avoine. Kystes avec cône de la vulve en pointe allongée et élancée, teinte brun clair; queue des larves 1 à 11/4×la longueur du stylet... ...H. schachtii. Nématode de la betterave.
    Notes: Summary Morphological differences between the cyst-forming species ofHerodera are briefly discussed. Examination of many populations and experience in practical survey and advisory work have shown, that the 6 important species in the Netherlands can be separated on the base of cyst shape. These differences are more difficult to describe than to observe in vivo (Figs. 1–5). The length of the larval tail (i.e. the clear portion of the tail from the tip to the body cavity) and additionally also other characters, serve as a valuable check. The following key is advertised for practical determination work: 1. Cysts pear-shaped, i.e. with rounded lower end of body ... Cysts lemon-shaped, i.e. with cone-shaped lower end of body and vulva on top of the cone ... 2. Cysts excluding neck oblong; anus and vulva each on a conspicuous thin spot in the cyst wall; larvae with very long and thin tail ...H. punctata Cysts excluding neck nearly round; vulva on a conspicuous thin spot in the cyst wall, anus scarcely visible; larval tail of about the same length as spear...H. rostochiensis 3. Cysts very small, relatively thick and round, reddish brown; larvae short and thick (length: breadth ratio±20)...H. cruciferae Cysts not very small; larvae not short and thick... 4. Cysts rather slender, bluntly lemon-shaped with scarcely protruded vulva cone, shining reddish brown; larvae with long, thin tail (±11/2×spear length)...H. goettingiana Cysts with definitely protruded vulva cone... 5. Cysts broad with short vulva cone; cyst wall brown to black; larval tail long (±11/2×spear length)...H. avenae=H. major Cysts with conspicuous, slender vulva cone, light brown; larval tail 1−1/4 ×spear length...H. schachtii
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of plant pathology 63 (1957), S. 345-360 
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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