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The influence of the nematode Meloidogyne incognita on competition between Solanum nigrum and tomato
Author(s) -
PONCE R. GONZALEZ,
ZANCADA C.,
VERDUGO M.,
SALAS L.
Publication year - 1995
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1995.tb01640.x
Subject(s) - solanum nigrum , meloidogyne incognita , biology , interspecific competition , weed , competition (biology) , lycopersicon , intraspecific competition , agronomy , solanum , terra incognita , solanaceae , horticulture , nematode , botany , biochemistry , gene , ecology
Summary The effect of Meloidogyne incognita (Kofoid & White) Chitwood, 1949, on the competitive relationship between tomato ( Lycopersicon esculentum Mill.) and black nightshade ( Solanum nigrum L.) was investigated under glasshouse conditions. Two intraspecific competition treatments were set up for the crop and the weed, and five interspecific treatments where the emergence of S. nigrum plants was progressively delayed in relation to tomato. Nematodes reproduced in all inoculated plants, their multiplication rates being much higher in tomato than in S. nigrum plants. Under nematode‐free conditions, intraspecific competition of tomato was more severe than the interspecific competition shown by the weed S. nigrum. Tomato was as tronger competition with S. nigrum than the weed was with itself. However, when infested by M. incognita , both species displayed a similar competitive ability. Tomato yield losses increased with prolonged weed competition but were greater under nematode‐infested conditions.