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Influence of rate and source of potassium on soybean cyst nematode reproduction on soybean seedlings

, : Influence of rate and source of potassium on soybean cyst nematode reproduction on soybean seedlings. Plant Disease Reporter 63(7): 558-560

In a glasshouse experiment, soybeans Dare, infested with Heterodera glycines were fed with potassium as KCl or K2SO4 at 50, 100, 200 or 400 mg/pot. The number of cysts/100 g soil and the number of cysts/plant were higher with K treatment of 50, 100 or 200 mg/pot than in the untreated control but declined with K at 400 mg. The decrease in soil cysts was larger with KCl than with K2SO4 treatment. The correlation coefficient between the average number of cysts in the soil and roots was 0.86.


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