Showing papers by "Wade H. Elmer published in 2000"
TL;DR: Sixty-seven samples of asparagus spears were obtained during 1995 and 1996 from 22 retail markets in New Haven County, CT, from three commercial growers in Connecticut, and from experimental field plots in Connecticut and North Carolina as discussed by the authors.
Abstract: Sixty-seven samples of asymptomatic asparagus spears (avg. 26.5 spears per sample) were obtained during 1995 and 1996 from 22 retail markets in New Haven County, CT, from three commercial growers in Connecticut, and from experimental field plots in Connecticut and North Carolina. Surface-disinfested basal and apical segments were placed on media selective for Fusarium spp. Eight species of Fusarium were identified among 418 isolates from 1,776 spears. Of these, 30 and 62% were F. oxysporum and F. proliferatum, respectively. The incidence of Fusarium colonization was greater from the basal segments (15.5%) than from apical segments (8.1%). Spears shipped from Mexico, Peru, and North Carolina had higher incidence of colonization by F. proliferatum than spears shipped from California, Washington, or the northeastern United States. In both years, spears purchased during June had the highest incidence of F. proliferatum compared with other months. Since F. oxysporum and F. proliferatum are pathogens a...
22 citations
TL;DR: Eggplants (cv. Midnite) were grown during 1996 to 1998 in soils naturally infested with Verti-cillium dahliae and the use of black plastic mulch with (NH4)2SO4 fertilization complements one another and may reduce damage from Verticillium wilt on eggplant.
Abstract: Eggplants (cv. Midnite) were grown during 1996 to 1998 in soils naturally infested with Verti-cillium dahliae. Experimental plots were either mulched with black plastic or grown on bare ground and fertilized with either (NH4)2SO4 or Ca(NO3)2 at 224 kg of N per hectare each season. Compared to bare ground, mulch resulted in a 42 and 68% increase in 1996 and 1997, respectively. Compared to Ca(NO3)2, (NH4)2SO4 fertilization increased yield by 22 and 18% in 1996 and 1997, respectively. In both years, there were no significant interactions between the mulch and fertilizer treatments on yield or on integrated estimates of the plant canopy growth curve or disease severity. However, the treatment effects were additive. When compared to bare ground, mulching increased the plant canopy 3 weeks after planting and reduced the percentage of symptomatic foliage 8 weeks after planting. Compared to Ca(NO3)2, fertilization with (NH4)2SO4 increased the plant canopy after 6 weeks, but did not affect the percentage ...
19 citations