THE PATHOGENICITY OF PRATYLENCHUS PENETRANS TO STRAWBERRY
نویسندگان
چکیده
منابع مشابه
Anhydrobiosis in Pratylenchus penetrans.
Anhydrobiotic survival of Pratylenchus penetrans was compared in several soil moisture regimes. Bodies of anhydrobiotic nematodes were coiled. In slow-dried soils, Vineland silt loam (VSL) and Fox loamy sand (FLS), 70 and 58% of the total P. penetrans populations were anhydrobiotic when soil moistures reached ca. 3% and water potential 15 kPa or greater. Coiling began at a much lower water pote...
متن کاملEffects of Pratylenchus penetrans on the Infection of Strawberry Roots by Gnomonia comari.
The fungus Gnomonia comari, causal agent of strawberry leaf blotch, was inoculated at the crown of young axenized strawberry plants growing in sterilized sand. Only the roots were colonized, and the infection was symptomless. When the fungus colonized the roots in the presence of the root lesion nematode Pratylenchus penetrans, the plants were extremely stunted and their root system was necroti...
متن کاملInfluence of Rotation Crops on the Strawberry Pathogens Pratylenchus penetrans, Meloidogyne hapla, and Rhizoctonia fragariae.
Field microplot, small plot, and greenhouse experiments were conducted to determine the effects of rotation crops on Pratylenchus penetrans, Meloidogyne hapla, and Rhizoctonia fragariae populations. Extraction of P. penetrans from roots and soil in microplots and field plots planted to rotation crops was highest for Garry oat, lowest for Triple S sorgho-sudangrass and Saia oat, and intermediate...
متن کاملMorphological variation in Pratylenchus penetrans.
Variability of morphological characters used to separate Pratylenchus penetrans from other species of the genus was studied in a population originating from a single gravid female. Pronounced heteromorphism was observed and characterized. About 30% of females had a crenate-tail terminus. Several shapes of stylet knobs were characterized; 50% of them were anteriorly flattened to indented. The ou...
متن کاملUltrastructure of the spicules of Pratylenchus penetrans.
The two spicules of PratyIenchus penetrans are not morphologically identical. The outer spicule is slightly larger and longer than the inner spicule. Each spicule is composed of a blade, shaft, and base. The spicules originate from the gradual thickening and invagination of the posterior walls of the spicular pouch. At the tip of each spicule are two small pores with one dendritic process assoc...
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ژورنال
عنوان ژورنال: Canadian Journal of Plant Science
سال: 1963
ISSN: 0008-4220,1918-1833
DOI: 10.4141/cjps63-012