PROVISIONAL LISTS OF HOST PLANTS OF SOME ROOT EELWORMS (HETERODERA SPP.)

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Abstract
In host‐range tests carried out at Cambridge, 1951‐3, beet eelworm was found to parasitize nearly all Cruciferae tested, while other hosts were found amongst the Amaranthaceae, Caryophyllaceae, Chenopodiaceae, Labiatae, Phytolaccaceae, Polygonaceae, Scrophulariaceae and Tropaeolaceae. Cabbage eelworm parasitized nearly all Cruciferae tested, and a few Labiatae. Hosts of Galeopsis and clover eelworms were found amongst the Caryophyllaceae, Labiatae, Leguminosae, Polygonaceae and Scrophulariaceae. Potato eelworm cysts were found only on Lycopersicum and Solanum; carrot eelworm only on Daucus; and hop eelworm only on Urtica (Urticaceae) and Cannabis and Humulus (Cannabinaceae). Pea eelworm appeared to parasitize only the genera Lathyrus, Lens, Pisum and Vicia (Leguminosae), while hosts of oat eelworm appeared to be distributed more or less at random within the Gramineae.