Papers by Chandrasekar Kousik
Compendium of Plant Genomes
Bookmarks Related papers MentionsView impact
Hortscience, Dec 1, 2017
Bookmarks Related papers MentionsView impact
Phytopathology, Feb 15, 2009
Bookmarks Related papers MentionsView impact
Acta horticulturae, 2021
Bookmarks Related papers MentionsView impact
Plant Disease, Aug 1, 2013
Bookmarks Related papers MentionsView impact
Phytopathology, 1996
... Auteur(s) / Author(s). KOUSIK CS (1) ; SANDERS DC ; RITCHIE DF (1) ; Affiliation(s) du ou des... more ... Auteur(s) / Author(s). KOUSIK CS (1) ; SANDERS DC ; RITCHIE DF (1) ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). (1) Department of Plant Pathology, Box 7616, North Carolina State University, Raleigh 27695, ETATS-UNIS Résumé / Abstract. ...
Bookmarks Related papers MentionsView impact
Phytopathology, Mar 1, 2002
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Plant Health Progress, 2020
Watermelon is an important cucurbit crop grown in 44 states in the United States of America (USA)... more Watermelon is an important cucurbit crop grown in 44 states in the United States of America (USA). South Carolina (SC) had the seventh largest watermelon production area in USA with 4,500 acres in 2018 valued at approximately $17 million. In June 2019, four watermelon plants displaying symptoms of virus infection including stunting, leaf crumpling, interveinal chlorosis, and necrosis of leaf margins were observed in a research trial in Charleston, SC. Whiteflies were observed on the abaxial surface of the leaves. One plant was tested for the presence of whitefly-transmitted cucurbit leaf crumple virus (CuLCrV), cucurbit yellow stunting disorder virus (CYSDV), and squash vein yellowing virus and aphid-transmitted papaya ringspot virus by RT-PCR. Amplicons of the expected size were only observed for CuLCrV (∼1 kb) and CYSDV (∼0.7 kb). Because CYSDV was not previously reported from SC, we continued to monitor the field for virus symptoms during the summer season. By mid-August 2019, 15 additional plants (1.9% incidence) were observed with similar symptoms of virus infection. Two virus identification methods (CP and Hsp70h) confirmed that CYSDV was indeed present in watermelon samples in SC. The geographic range of CYSDV and other whitefly-transmitted viruses continues to expand into and within major cucurbit-producing regions with each production season, especially in the southeastern USA. This is the first report of CYSDV infecting watermelon or any other plant in SC. These three whitefly-transmitted viruses now need to be considered in management plans by SC growers. Knowledge of the presence of CYSDV, an additional virus, infecting cucurbits, in SC is also important from a regulatory perspective.
Bookmarks Related papers MentionsView impact
Phytopathology, Nov 1, 1999
Bookmarks Related papers MentionsView impact
Plant Disease, Feb 1, 2001
Bookmarks Related papers MentionsView impact
Horttechnology, Oct 1, 1994
Bookmarks Related papers MentionsView impact
Plant Health Progress, 2021
Phytophthora capsici is an oomycete pathogen causing economically important diseases in a wide ra... more Phytophthora capsici is an oomycete pathogen causing economically important diseases in a wide range of hosts worldwide including cucurbitaceous, solanaceous, and fabaceous crops. All plant parts, crown and roots, or only the fruit may be affected depending on the host, and symptoms can range from wilting to rot and plant death. Considered a hemibiotroph, P. capsici can be cultured in artificial media and maintained in long-term storage. In this diagnostic guide, we describe methods to identify P. capsici infection based on disease symptoms and pathogen signs. We also outline methods for molecular identification, pathogen isolation, storage of single-sporangium cultures, and pathogenicity testing.
Bookmarks Related papers MentionsView impact
Plant Disease, 1995
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Plant Pathology, Jun 1, 1995
Isolates representing 11 anastomosis groups (AGs) of Rhizoctonia solani from various geographic l... more Isolates representing 11 anastomosis groups (AGs) of Rhizoctonia solani from various geographic locations and host plants were tested for virulence on soybean leaves at 15, 20, 25, 30, and 35°C, and on soybean seedlings at 20, 25, and 30°C. Numbers of infection cushions formed on soybean leaves were determined using light microscopy. Isolates of AG-1 IA, AG-1 IB and AG-5 were more virulent on soybean leaves at 20, 25, and 30°C than isolates of AG-1 IC and AG-4. Maximum numbers of infection cushions were formed on soybean leaves by AG-1 (IA, IB, and IC), AG-4, and AG-5 at 25 and 30°C. The other AGs tested did not form infection cushions on soybean leaves although some caused minimal disease severity. Isolates of AG-1 IA formed significantly more infection cushions and caused greater disease severity than AG-1 IB and other isolates at 35°C. Maximum seedling infection, based on per cent area of hypocotyl region covered by lesions occurred at 25 C for AG-1 (IA, IB, and IC) and AG-4. Isolates of AG-5 caused greater seedling infection at 20°C than at 25 and 30°C. The other AGs tested caused only minimal damage to the seedlings. Isolates of AG-4 and AG-5 are not known to cause Rhizoctonia foliar blights of soybean in Louisiana, but their potential to be destructive foliar pathogens is confirmed.
Bookmarks Related papers MentionsView impact
Plant Pathology, Apr 1, 1994
Bookmarks Related papers MentionsView impact
Plant Disease, 1998
The effect of major resistance genes (Bs1, Bs2, and Bs3) or gene combinations for resistance to b... more The effect of major resistance genes (Bs1, Bs2, and Bs3) or gene combinations for resistance to bacterial spot of bell peppers (Xanthomonas campestris pv. vesicatoria) in 15 commercial cultivars on disease reduction and yield were studied during 1995 and 1996. Reaction of cultivars to specific races (races 1, 2, or 3) of the pathogen corresponded with seed company claims for resistance against these races. Races 1 to 4 were used as initial inoculum in 1995, and races 1 to 6 in 1996 field experiments. Cultivars with no known resistance genes to bacterial spot (e.g., Camelot, Jupiter, and Valiant), a single resistance gene (X3R Camelot, King Arthur), or a combination of Bs1 and Bs3 genes (Guardian, Sentinel, and Admiral) were severely diseased. Yields were reduced in all inoculated cultivars compared to non-inoculated cultivars used as controls. Although races 4 and 6 caused significant disease in cultivars with only Bs1 (King Arthur) or Bs2 (X3R Camelot) genes, cultivars with a combi...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Uploads
Papers by Chandrasekar Kousik