The responses of four mushroom cultivars ('PSU-310,' 'PSU-324,' 'PSU-348,' and 'PSU-344') exposed to free-living nematode infestations were compared in two experiments by quantitatively determining the amount of mycelium in compost samples using a laccase assay technique. The amount of mycelial production for cultivars 'PSU-310,' 'PSU-324,' and 'PSU-348' in the control treatments of both studies was similar. While cultivar 'PSU-344' produced less mycelium as shown by laccase production, mycelial production was greatly reduced for all four cultivars exposed to nematode infestations in a high-moisture compost (78%) over the duration of the experiment. The initial compost moisture is implicated as a critical factor influencing the potential damage caused by nematode infestations.
oriented germs). Randomly planted kernels had the lowest kernel density but the highest percentage of starch. Grain yields again were greater for NS rows (12.0 vs. 11.6 metric tons/ha; P ≤ 0.01) due to 6.5% greater kernel weights (P ≤ 0.01). The higher plant population increased grain yield per hectare but decreased kernels per ear (P < 0.02). Regressed across all samples, each 1% added starch displaced 0.38% oil and 0.44% protein. Grain yields were greater for kernels specifically at planting and when grown in NS than in EW rows.
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