Filtering by tag: vegetable crops ✕

Figure 1. Symptomatic concentric lesions on pepper fruits caused by Colletotrichum species.

Be on the Lookout for Pepper Anthracnose Caused by Colletotrichum Scovillei

Written by Lina Quesada-Ocampo, Sarah Cochran-Murray, and Inga MeadowsReports of pepper anthracnose outbreaks caused by Colletotrichum scovillei are increasing across the southeastern U.S., including…

Cucumber leaves showing yellow chlorotic spots and pronounced veining

Downy Mildew Confirmed on Cucumbers in Eastern North Carolina

Downy mildew, caused by the oomycete Pseudoperonospora cubensis, has been identified on cucumber crops in Eastern North Carolina as of June 10, 2025. Disease symptoms were observed in commercial…

Fig. 1: gummy stem blight leaf spots on watermelon leaves and cotyledons (Photo: Erin Eure, NC State Extension)

Gummy Stem Blight Detected in Watermelon Transplants in North Carolina

In the past couple of weeks we have seen a few cases of watermelon seedlings infected with gummy stem blight. This early detection is concerning, as transplant infections can serve as the initial…

Featured image: Cucumber leaf with downy mildew lesions and sporulation under a hand-held microscope for diagnosis (Photo credit: Lina Quesada)

Cucumber Downy Mildew Found in Sampson County in North Carolina

Pseudoperonospora cubensis is responsible for cucurbit downy mildew (CDM), which was detected in Sampson County on cucumbers on June 4, 2024, with a disease incidence of around 5%.On the upper side…

squash leave with disease symptoms

Squash Downy Mildew found in Clayton N.C.

Written by Md Ziaur Rahman Bhuiyan and Lina M. Quesada-Ocampo.Cucurbit downy mildew (CDM) is caused by an obligate oomycete, Pseudoperonospora cubensis. This disease was confirmed on squash in…

underside of cucumber leaf

Cucumber Downy Mildew Found in Lenoir County in North Carolina

Written by Mariana Prieto-Torres and Lina M. Quesada-Ocampo.Pseudoperonospora cubensis is the causal agent of cucurbit downy mildew (CDM). This disease was confirmed on June 20, 2023 in Lenoir County…

black rot symptoms on Sweetpotato

EPA Issues Label Approving Mertect in Sweetpotatoes

Updates for Sweetpotato Producers in NC: EPA issues Section 3 label for Mertect (thiabendazole) in sweetpotatoes postharvest and EU raises MRL to 3 ppm From Dr. Lina Quesada-Ocampo and Camilo H.…

Angular, yellow lesions on topside of the leaves that are bound by leaf veins

Cucumber Downy Mildew Found in North Carolina

Written by Mariana Prieto-Torres and Lina M. Quesada-Ocampo.Pseudoperonospora cubensis, the causal agent of cucurbit downy mildew (CDM), was confirmed on cucumbers in Wilson and Sampson Counties on…

black rot symptoms on Sweetpotato

Section 18 Label Renewal Approved for Use of Mertect (Thiabendazole) for Control of Sweetpotato Black Rot Postharvest in Domestic Markets

Written by Camilo H. Parada-Rojas and Dr. Lina M. Quesada-OcampoThe United States (U.S.) Environmental Protection Agency (EPA) renewed the section 18 emergency label, originally obtained in 2016, for…

Pile of unwashed sweet potatoes with soil and rootlets

How to Identify and Manage Sweeetpotato Scurf Caused by Monilochaetes Infuscans

From Camilo Parada and Dr. Lina Quesada-OcampoIn collaboration with the Plant Disease and Insect Clinic at NC State University, we confirmed several cases of sweetpotato scurf in North Carolina.…