— Written By Lindsey Thiessen

Dieback Symptoms in Hemp

More than the final month, dieback symptoms have been broadly observed in hemp stands. These symptoms are characterized by wilting and necrosis of branch ideas. These symptoms could be brought on by numerous unique illnesses. At present, there are no powerful chemical management methods that are legal for use in industrial hemp at this time. Management for these illnesses revolves about comparable methods. Lessen excess moisture in the field exactly where achievable. Destroy crop debris speedily at the finish of the developing season to limit inoculum survival. Planting consecutive seasons of industrial hemp favors illness, and crops really should be rotated with non-host plants.

Tip Dieback (Lassidiplodia crassispora)

Dieback brought on by fungi in the Botryosphaeriaceae can bring about tip dieback. Infections start in the stems, frequently following physical injury from insects or other mechanical injuries. Lesions brought on by these pathogens frequently bring about black vascular discoloration.

Rhizoctonia Net Blight (Rhizoctonia solani)

Blight brought on by Rhizoctonia solani starts at the prime of the plants. Leaves turn into necrotic and keep attached to the plant. Fungal webbing can be observed among leaves.

Fusarium Stem Canker (Fusarium graminearum)

Stem cankers brought on by Fusarium spp. start low on the stalk following periods of warm temperatures and higher humidity or rainfall. Vascular tissue inside impacted stems show pink-brown discoloration. Tops of plants wilt and leaves brown. Plants may possibly turn into girdled and lodge.

Hemp Canker (Sclerotinia sclerotiorum)

Hemp canker brought on by Sclerotinia spp. bring about lesions on reduce stems. Plants wilt, and dieback. The vascular tissue becomes shredded and inside the dead tissues, black, irregularly-shaped sclerotia may possibly be located.

Diagnostic Help

For diagnostic help, samples can be confirmed at the diagnostic clinic. Seek the advice of the clinic web-site for sample submission needs.