Biology of Subanguina picridis, a Potential Biological Control Agent of Russian Knapweed
Watson, A.K.
Journal of Nematology 18(2): 149-153
1986
ISSN/ISBN: 0022-300X PMID: 19294156 Document Number: 274576
The knapweed nematode, Subanguina picridis, forms galls on the leaves, stems, and root collar of Russian knapweed, Acroptilon repens. After being revived from a dormant, cryptobiotic state, second-stage juveniles required at least 1 month in a free-living state before becoming infective. Galls were induced on relatively slow-growing host plants that retained their apical meristems at or near the soil surface for 2-5 weeks. Galls developed extensive areas of nutritive tissue. The nematode was introduced from the Soviet Union and released in Canada for the biological control of Russian knapweed.