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Composite photograph of guava root-knot nematode damage on sweetpotato. On the left side are two photos of storage roots with galls caused by GRKN. On in the middle is GRKN galls on a sweetpotato fibrous root. On the right is a sweetpotato with skin peele

Guava Root-Knot Nematode: 2024 Emergency Management Recommendations for Sweetpotato Producers

Nothing beats the delicious and nutritious sweetpotatoes from North Carolina. Yet the guava root-knot nematode (GRKN; Meloidogyne enterolobii) continues to threaten production of this important…

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.…

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.…

Black rot of Sweetpotato

Sweetpotato Black Rot Found in Storage Facilities

From Madison Stahr and Dr. Lina Quesada-OcampoSweetpotato black rot, caused by the fungal pathogen Ceratocystis fimbriata, was found in two commercial sweetpotato storage facilities in January of…

Black rot of sweetpotato

Section 18 Label Renewal Approved for Use of Mertect for Black Rot Control in Sweetpotato

From Madison Stahr and Dr. Lina Quesada-OcampoThe environmental protection agency (EPA) has renewed the specific exemption section 18 emergency label, originally obtained in 2016, for the use of…

Raw sweet potatoes piled together

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

The specific exemption section 18 label obtained in 2016 for using Mertect (thiabendazole) for control of black rot (caused by the fungus Ceratocystis fimbriata) postharvest on sweetpotatoes in North…

Dirty pink sweet potato with knobby bumps on scratched black plastic surface

Management of the Guava Root Knot Nematode in Sweetpotatoes

In recent years, some North Carolina sweetpotato growers have found Meloidogyne enterolobii, also known as the guava root knot nematode, affecting their crop. These reports have prompted previous…

Dark, dry lesion on sweetpotato typical of black rot caused by Ceratocystis fimbriata.

Section 18 Label Renewed in North Carolina for Use of Mertect Postharvest to Control Black Rot of Sweetpotato for Domestic Markets

The specific exemption section 18 label obtained in 2016 for using Mertect (thiabendazole) for control of black rot (caused by the fungus Ceratocystis fimbriata) postharvest on sweetpotatoes in North…

Meloidogyne enterolobii root knot damage on sweetpotato (Dr. Weimin Ye, NCDA&CS)

Emergent Nematode in Sweetpotato and Other Vegetable Crops

This month Dr. Weimin Ye, nematode assay section chief at the North Carolina Department of Agriculture and Consumer Services (NCDA&CS;) issued an alert warning sweetpotato growers about an emergent…