Effects of pyrethroid insecticide seed treatments on Rhizobium japonicum and its symbiotic relationship with,and growth of soybean |
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Authors: | C M Tu |
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Institution: | Research Centre , Agriculture Canada , London, Ontario, N6A 5B7, Canada |
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Abstract: | Abstract Two pyrethroid insecticides were compared with two fungicides for their effects on the rhizobial and seedling components of the N2‐fixing symbiosis in soybeans (Glycine max Merr. variety Olinda). In vitro growth of Rhizobium japonicum RI16, was inhibited in the order of HgCl2 > thiram > cypermethrin > permethrin. The emergence of the seedlings was stimulated by all chemicals tested. Also, none of the pesticides studied had any significant effect on N2 fixation (acetylene reduction), at the dosages used. Consequently, yields of the various organs were also not significantly influenced by the chemicals. |
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Keywords: | Pyrethroid insecticide seed treatment Rhizobium japonicum soybean |
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