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— Written By Lindsey Thiessen

Dieback Symptoms in Hemp

More than the final month, dieback symptoms have been extensively observed in hemp stands. These symptoms are characterized by wilting and necrosis of branch recommendations. These symptoms could be triggered by quite a few diverse ailments. Presently, there are no powerful chemical management approaches that are legal for use in industrial hemp at this time. Management for these ailments revolves about comparable approaches. Decrease excess moisture in the field exactly where feasible. Destroy crop debris promptly at the finish of the increasing season to limit inoculum survival. Planting consecutive seasons of industrial hemp favors illness, and crops ought to be rotated with non-host plants.

Tip Dieback (Lassidiplodia crassispora)

Dieback triggered by fungi in the Botryosphaeriaceae can lead to tip dieback. Infections start in the stems, usually following physical injury from insects or other mechanical injuries. Lesions triggered by these pathogens usually lead to black vascular discoloration.

Rhizoctonia Internet Blight (Rhizoctonia solani)

Blight triggered by Rhizoctonia solani starts at the best of the plants. Leaves develop into necrotic and keep attached to the plant. Fungal webbing can be noticed involving leaves.

Fusarium Stem Canker (Fusarium graminearum)

Stem cankers triggered 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 might develop into girdled and lodge.

Hemp Canker (Sclerotinia sclerotiorum)

Hemp canker triggered by Sclerotinia spp. lead to lesions on reduced stems. Plants wilt, and dieback. The vascular tissue becomes shredded and inside the dead tissues, black, irregularly-shaped sclerotia might be discovered.

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.