Search Results

You are looking at 91 - 100 of 417 items for :

  • lesion development x
  • Refine by Access: User-accessible Content x
Clear All
Free access

Thomas J. Molnar, Joseph C. Goffreda, and C. Reed Funk

entirely effective ( Johnson et al., 1996 ; Julian et al., 2008 ). Therefore, the development of cultivars with genetic resistance to the pathogen appears to be the most effective means for control ( Mehlenbacher, 1994 ). Breeders at Oregon State

Free access

Kaori Ando, Sue Hammar, and Rebecca Grumet

producing sporulating lesions at 4 and 10 DPI and the shortest time to 50% sporulating fruit ( Fig. 1, D–F ). Summer squash and zucchini were also notable for rapid development of water-soaking symptoms; more that 50% of the tested fruit exhibited water

Free access

Lina M. Rodríguez-Salamanca and Mary K. Hausbeck

Colletotrichum coccodes in vitro Phytopathology 78 1357 1361 Dillard, H.R. 1989 Effect of temperature, wetness duration, and inoculum density on infection and lesion development of Colletotrichum coccodes on tomato fruit Phytopathology 79 1063 1066 Dillard, H

Free access

Xiaoling He, Susan C. Miyasaka, Yi Zou, Maureen M.M. Fitch, and Yun J. Zhu

14 d after inoculation. Lesions in stems of transgenic taro were evident by 30 d and plants died by 50 d or greater than threefold longer durations compared with non-transformed control plants. Discussion Development of a

Free access

K.S. Lewers, W.W. Turechek, S.C. Hokanson, J.L. Maas, J.F. Hancock, S. Serçe, and B.J. Smith

development based on petiole lesion length and crown rot symptoms was assessed 30 d after inoculation ( Smith and Black, 1987 ). Disease severity was rated on a standardized scale of 0 to 6 (0 = healthy plant with no visible symptoms; 1 = petiole lesions <3 mm

Free access

Huangjun Lu and Richard Raid

production in recent years. In 2010, a severe epidemic caused significant crop damage and economic losses. Typical BLS symptoms are brown to black, greasy-appearing lesions, which render the entire lettuce head unmarketable as a result of the unsightly leaf

Full access

Jan van Niekerk, Charl Kotze, Jade North, and Paul Cronje

( Figs. 1 and 2C , D). It is suspected that the lesion development after cellular collapse, after phosphonate foliar applications follows the same progression in development of brown discoloration as during rind breakdown. Degradation of cells combined

Free access

Barbara J. Smith

lesion development. Pepper was the most resistant host with no symptom development on leaves or stems following inoculation with any isolate. These results suggest that primary anthracnose infections in strawberry fields are most often from infected

Free access

Dennis N. Portz and Gail R. Nonnecke

-(phosphonomethyl)glycine] applied with a hand wick applicator and then pre-emergent herbicide was applied (DCPA, dimethyl tetrachloroterephthalate) ( Bordelon et al., 2006 ). Strawberry plants for sampling of root-lesion nematodes were collected 25 Oct. 2005, 30 Oct. 2006, and 17

Free access

Ivan Simko, Ryan J. Hayes, Carolee T. Bull, Beiquan Mou, Yaguang Luo, Mark A. Trent, Amy J. Atallah, Edward J. Ryder, and Rebecca G. Sideman

involvement of private seed companies in lettuce breeding. The USDA breeding program is focused mostly on development of improved iceberg, romaine, and leaf lettuce inbred lines through introgression of desirable traits from wild species, heirloom material