Effect of Meloidogyne incognita on Selected Forest Tree Species
Wang, K.C.; Bergeson, G.B.; Green, R.J.
Journal of Nematology 7(2): 140-149
1975
ISSN/ISBN: 0022-300X PMID: 19308146 Document Number: 92510
The effects of Meloidogyne incognita on seedlings of 14 species of forest trees were investigated in pot experiments by inoculating with 100, 1,000 or 10,000 larvae at 5 seedling growth stages up to one year. Growth and histopathology of the seedlings and reproduction of the nematodes were assessed. Taiwania cryptomerioides proved immune: Picea abies and Pinus virginiana were highly resistant and there was no nematode reproduction: seedling emergence was severely reduced in Cryptomeria japonica and seedlings of Chamaecyparis obtusa were severely damaged in the young stages and the nematodes failed to reproduce. Inoculations of 1-year-old seedlings of Thuja occidentalis, Pinus resinosa and P. strobus caused little damage and few or no nematodes reproduced. In P. sylvestris and P. banksiana survival of seedlings was reduced but reproduction of most nematodes was restricted by layers of densely stained cells. Seedlings of Cunninghamia lanceolata were severely damaged by M. incognita associated with Fusarium oxysporum; the nematodes reproduced in variable numbers. Similar effects were seen in Paulownia fortunei but seedling damage was less. In Albizzia falcata the nematode had little effect on seedling emergence and survival and it reproduced well as it did also on Robinia pseudoacacia, but seedlings of this species were stunted in early growth and survival was reduced at the highest pre-emergence inoculum level.