Verticilliumwilt (caused by V. dahliae ) is an important soilborne disease that limits watermelon ( C. lanatus ) production in Washington State and worldwide ( du Toit et al., 2005 ; Dung and Weiland, 2014 ; Johnson, 2012 ; Paplomatas et al
soilborne pathogens affect the production of spinach leaf and seed crops ( Correll et al., 1994 ). Although Verticillium dahliae causes Verticilliumwilt of more than 200 species of vegetables, field crops, and trees, the fungus was not, until recently
Verticilliumwilt caused by the soilborne fungus V. dahliae is a significant disease affecting watermelon ( Citrullus lanatus ) production in Washington State ( Dung and Weiland, 2014 ; Sunseri and Johnson, 2001 ). Once established in the field
estimated at 243 ha (Timothy Waters, personal communication). One of the barriers to increasing watermelon production in this region of southeastern Washington is verticilliumwilt (caused by Verticillium dahliae ), which can cause rapid vine decline and
available ( Lebeda et al., 2009 ). To achieve this, continual screening for new/additional resistances is necessary because new diseases emerge or change. Verticilliumwilt caused by Verticillium dahliae Kleb. is a serious disease of lettuce that was first
. Furrow irrigation can be thought of as periodic flooding of fields.
Major constraints to chile pepper production in New Mexico are soilborne diseases, which are manifested by wilt symptoms after plant infection. Verticillium dahliae is a major
Cercis canadensis, Eastern Redbud, is very Cercis canadensis, Eastern Redbud, is very susceptible to infection by Verticillium Wilt caused bysusceotible to infection by Verticillium Wilt caused by the common soil-borne fungi Verticillium albo-atrum and Verticillium dahliae. Little is known about the inoculum levels, the time required for natural infection to occur and how fast the pathogen travels inside the host species. One-year-old Cercis canadensis seedlings were planted in 7.6 liter (2-gallon) containers with a 1:1:2 soil/sand/perlite mix inoculated with five levels (0, 10, 100, 500, and 1000 microsclerotia/g soil) of V. dahliae prior to planting. At the end of the first growing season, half of the plants were removed from the containers, surface sterilized, dissected and root sections plated out on a Verticillium selective media. The remaining plants were grown for a second season. Infection first occurred in plants which received 100, 500 or 1000 ms/g at the end of the first season. The infection had spread at least 5 cm during the first growing season.
‘Quinte’ (ST-19) is a midseason, large, firm, crimson-colored tomato (Lycopersicum esculentum Mill.). It was developed in the early 1970s to replace ‘Moira’. Named after the Bay of Qunite, it is now extensively grown in eastern Ontario, Canada, and the northeastern United States, especially in areas where Verticillium wilt (Verticillium alboatrum Reinke & Berth, and V. dahliae Kleb.) is a problem. The fruit is suitable to the fresh-market and processed-juice industries.
. Romano and Paratore (2001) found that grafting tomato with ‘Beaufort’ rootstock increased plant vigor and yield, but there was no effect on fruit quality. Verticilliumwilt is a soilborne disease caused by Verticillium dahliae Kleb. that impacts
Since its appearance in 1995, Verticillium wilt of lettuce has spread through the Salinas River Valley, where nearly 60% of California's lettuce acreage is located. A replicated field trial was conducted to assess various modern and heirloom lettuce (Lactuca sativa) cultivars, plant introductions, and L. virosa lines for resistance to Verticillium wilt. Based on horticultural type, lettuce plants were destructively sampled at harvest maturity and assessed for the incidence of Verticillium wilt. Of the L. sativa cultivars, only the iceberg type displayed pronounced foliar symptoms of stunting and wilting. Disease incidence based on root symptoms ranged from 0% to 100%, with continuous variation found across and within lettuce types. Most cos, crisphead, and leaf cultivars exhibited 20% or greater disease incidence. Butter cultivars exhibited the lowest disease incidence among the major lettuce types examined, and Latin and Batavia type cultivars exhibited the lowest disease incidence overall. Disease progression was further monitored for 10 select lettuce cultivars for 2 weeks past harvest maturity. Disease intensity increased over the 2-week period for some cultivars, demonstrating the need to assess plants for Verticillium wilt past harvest maturity to avoid misclassifying plants. The L. sativa plant introduction lines tested, predominantly stem and oil-seed horticultural types, were quite susceptible and exhibited distinct symptoms of wilt and defoliation, possibly due to their elongated growth habit. The variation in disease incidence among the L. virosa lines tested was discontinuous, with discrete differences in susceptibility. Overall, the results reflected trends found in previous greenhouse and field trials.