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Publications by Henry H. P. Severin

Aphid Transmission of Mild Mosaic Virus of Annual Stock

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Poison-Hemlock-Ringspot Virus and Its Transmission by Aphids to Celery

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Insect Transmission, Host Range, and Properties of the Crinkle-Leaf Strain of Western-Celery-Mosaic Virus

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Additional Ornamental Flowering Plants Naturally Infected With California Aster Yellows

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Transmission of Tomato Yellows, or Curly Top of the Sugar Beet, byEutettix Tenellus(Baker)

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Transmission of California Aster-Yellows Virus by Leafhopper Species in Thamnotettix Group

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Symptoms of the Celery-Calico Virus on Tomato Plants

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