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Pathogenicity of Heterodera medicaginis

Pathogenicity of Heterodera medicaginis

Zashchita Rastenii, Moscow (12): 29-30

H. medicaginis causes severe losses in lucerne crops in the Rostov region, USSR. A survey of the Aksaiks district showed that yields were decreased at infestation levels of > 1000 larvae/100 cmsuperscript 3 of soil; the nematode was most pathogenic to young plants. Thus at 1500 larvae/100 cmsuperscript 3, the green mass yield was 34% less than in uninfected plots in the first year and 6% less in the 2nd and 3rd years.

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