POPULATION INCREASE OF PRATYLENCHUS-HEXINCISUS ON CORN AS RELATED TO SOIL-TEMPERATURE AND TYPE

  • 1 January 1980
    • journal article
    • research article
    • Vol. 12  (4) , 313-318
Abstract
Population increase of P. hexincisus on corn was tested over 3 mo. at 15, 20, 25 and 30.degree. C in Marshall silt loam, Clarion silt loam, Buckner coarse sand and Haig silty clay loam soils. The optimum temperature for increase was 30.degree. C in all soils. The nematode population was significantly larger in Buckner coarse sand than in other soil types at 30.degree. C. The recovered P. hexincisus populations equaled or exceeded initial inoculum levels at the 2 higher temperatures in Marshall silt loam and Haig silty clay loam and at 30.degree. C in Clarion silt loam and Buckner coarse sand. P. hexincisus required 32,400 heat units in Haig silty clay loam and more than 40,000 heat units in the other 3 soil types to reach a level that causes significant height and biomass reduction in corn under controlled condition.

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