Results 131 to 140 of about 522 (163)

The properties of the oil of Xanthium spinosum*

Journal of the American Pharmaceutical Association (Scientific ed.), 1949
Some chemical and physical properties of the oil obtained from Xanthium spinosum are reported. Preliminary studies on toxicity and on blood pressure response indicate that the oil is pharmacodynamically inert.
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Xanthium spinosum L. - Bathurst burr

2012
Bathurst burr, Xanthium spinosum (Asteraceae), is a widespread summer annual weed in rangeland, pastures and crops in eastern Australia. Possibilities for both the inundative (bioherbicide) and classical biocontrol of Bathurst burr have been explored. In the 1980s–90s, the anthracnose fungus Colletotrichum orbiculare that naturally occurs on Bathurst ...
Louise Morin, Bruce A Auld
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Possible control of Xanthium spinosum by a fungus

Agriculture, Ecosystems & Environment, 1988
Abstract Xanthium spinosum L. is among the world's worst weeds and is particularly important in Australia. Although susceptible to 2,4-D it often occurs near crops where the herbicide cannot be used. The fungus, Colletotrichum orbiculare (Berk. et Mont.) v.
Bruce A. Auld, Cheryl F. McRae, Madeleine M. Say   +2 more
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Emergence and flowering in Xanthium spinosum

Agriculture, Ecosystems & Environment, 1993
Abstract Xanthium spinosum , Bathurst burr or spiny clotburr is an introduced widespread annual weed in eastern Australia and several other countries. Experiments and field observations were made to contribute to understanding the species' success. Seed dormancy varied between sites and was not affected by partial fruit coat removal. Seeds in fruits
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Anthracnose of Xanthium Spinosum - Quantitative Disease Assessment and Analysis.

Australasian Plant Pathology, 1988
A sensitive disease assessment and analysis technique was developed for anthracnose of the weed Xanthium spinosum caused by Colletotrichum orbiculare. Time to plant death was used to discriminate between treatments. The disease rating scale reflected disease progression patterns rather than static symptoms. The mean daily rating in all treatments up to
CF McRae, HR Ridings, BA Auld
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Field applications of Colletotrichum orbiculare to control Xanthium spinosum

Agriculture, Ecosystems & Environment, 1990
The fungal pathogens Colletotrichum orbiculare is being assessed as the basis for a mycoherbicide for biological control of Xanthium spinosum, Bathurst burr or spiny cockleburr. Following preliminary small plot field applications in summer 1987/88, applications of aqueous spore suspensions of 106 or 107 spores ml−1 were made at four sites in summer ...
B.A. Auld, M.M. Say, H.I. Ridings, J. Andrews   +3 more
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Phytophagous Insect Faunas of Spiny Clotbur, Xanthium spinosum, and Cocklebur, Xanthium strumarium, in Southern California

Environmental Entomology, 1983
Phytophagous insects representing six orders, 14 families, and 18 identified and 3 unidentified species are reported as comprising the insect fauna of spiny c1otbur, Xanthium spinosum L. (Compositae), in southern California. Similarly, insects representing six orders, 29 families, and 60 species are reported as associates of cocklebur, X. strumarium L.
Jack H. Hilgendorf, Richard D. Goeden
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Influence of Potential Stress Factors on Anthracnose Development on Xanthium spinosum

The Journal of Applied Ecology, 1990
The fungal pathogen Colletotrichum orbiculare which causes anthracnose of the exotic weed Xanthium spinosum is being evaluated for use as a mycoherbicide for biological control of the weed in Australia. Four experiments investigated the effects of potential stress factors on the host-pathogen interaction.
B. A. Auld, M. M. Say, G. D. Millar
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Role of conidial matrix of Colletotrichum orbiculare in pathogenesis of Xanthium spinosum

Mycological Research, 1990
The extracellular conidial matrix in Colletotrichum orbiculare inoculum hastened the onset of visual symptoms and the level of anthracnose development in Xanthium spinosum. The conidial matrix contained enzymes known to be involved in fungal penetration of plants — cellulase, non-specific esterase, invertase, pectinesterase and pectic lyase.
C.F. McRae, G.R. Stevens
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CONTACT ALLERGY TO COCKLEBUR (XANTHIUM SPINOSUM)

Archives of Dermatology and Syphilology, 1939
During the last three years I have observed a man aged 68 years who had typical dermatitis venenata in April, two years before I saw him. It started on the face, hands, arms and legs, spreading to a lesser degree over the entire body, gradually diminishing in the fall and winter.
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