Evaluation of powdered pine bark for control ofMeloidogyne arenaria andHeterodera glycines on soybean |
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Authors: | Nancy Kokalis-Burelle Rodrigo Rodríguez-Kábana Charles F Weaver Peggy S King |
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Institution: | (1) Department of Plant Pathology, Auburn University, 209 Life Sciences Building, 36849-5409 Auburn, AL, USA |
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Abstract: | Commercially avaiable pine bark nuggets (composted) and fresh pine bark were ground into powders and added at rates of 0 to 50 g kg–1 to field soil infested withMeloidogyne arenaria andHeterodera glycines. The treated soil was maintained moist in the greenhouse for 2 weeks, sampled, and planted with Davis soybean (Glycine max.). Eight weeks after planting, numbers ofM. arenaria andH. glycines in soil decreased with increasing amounts of composted or fresh pine bark. No juveniles were present in soil treated with 5% pine bark. The number of galls and cysts g–1 root decreased in proportion to the amount of pine bark added to soil. Gall and cyst formation was completely eliminated at the 5% rate. Numbers of saprophagous nematodes were highest in soil with 4–5% pine bark. The activity of several soil enzymes was correlated with the addition of both composted and fresh pine bark. Fresh pine bark powder caused an increase in soil enzyme activity compared to composted pine bark, but did not provide consistent control of gall and cyst formation.Journal Series No. 18-933579 Alabama Agricultural Experiment Station |
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Keywords: | fluorescein diacetate Glycine max Heterodera glycines invertase Meloidogyne arenaria organic amendments pine bark soybean trehalase |
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