Premium
Interactions of some nematicides with Azospirillum lipoferum and the growth of Zea maize
Author(s) -
Fayez M.
Publication year - 1990
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19901530404
Subject(s) - carbofuran , aldicarb , microbial inoculant , inoculation , agronomy , incubation , biology , horticulture , cultivar , dry matter , chemistry , pesticide , biochemistry
The possible interaction of four nematicides (Terbufos, Carbofuran, Fenamiphos, and Aldicarb) with Azospirillum lipoferum and growth of two Zea maize cultivars was studied in a greenhouse experiment. Application of nematicides, Fenamiphos in particular, resulted in higher plant length, dry matter production and N yield over the nematicide‐untreated plants. Azospirillum spp. inoculation stimulated the growth of nematicide‐treated Z. maize . Among the nematicides used, Carbofuran and Aldicarb inhibited the nitrogenase activity on plant roots more seriously than Fenamiphos and Terbufos. Generally, the inhibition percentages in acetylene reducing activity in soil of inoculated treatments were lower (14.4 ‐ 61.8%) than those reported for the uninoculated ones (21.4 ‐ 73.9%). Soil, irrespective of treatment, regained a part of its normal N 2 ‐ase activity with time. Field concentrations of all nematicides showed different inhibitory effects on N 2 ‐ase activity of Azospirillum spp. in culture medium, such effects increased with increased doses (10‐ and 100‐ fold) and incubation periods (10 days). The contribution of Azospirillum spp. to the N economy of soil treated with nematicides is discussed.