Search Results

You are looking at 1 - 3 of 3 items for

  • Author or Editor: Susan B. Sterrett x
Clear All Modify Search

Abstract

Carbon-nitrogen relationships and pH of 2 milled hardwood bark-amended media were influenced similarly by 3 N sources, (NH4)2SO4, NH4NO3, and Ca(NO3)2 incorporated at 0, 0.89 and 1.78 kg/m3 prior to composting. Nitrogen source did not affect overall growth; however dry weight and growth index of Cotoneaster dammeri Schneid cv. Royal Beauty increased with increasing N rate. Source and rate of N had little effect on the foliar analysis, and all values were within the acceptable range for woody ornamentals.

Open Access

Field cage experiments were conducted in Ithaca, N.Y. in 2001 to determine the yield effect of potato leafhopper (Empoasca fabae) infestations on early-stage beans (Phaseolus vulgaris). Yields of `Hystyle' snap beans and `Montcalm' dry kidney beans were significantly reduced when infested by potato leafhopper at the cotyledon, two-leaf, and four-leaf stages. For snap beans, no differences in yield response from potato leafhopper were observed among the three plant growth stages. For dry beans, there was a difference in yield response between cotyledon and four-leaf-stage plants. Dynamic economic injury levels for potato leafhopper on early-stage beans are suggested.

Full access