I am not sure at all If its virus or bacteria .. or broad mites but no mites are seen.
Here is a list of what cannabis can get B
FUNGAL DISEASES
Anthracnose
Colletotrichum coccodes (Wallroth) Hughes
= C. atramentarium (Berk. & Broome) Tauberhaus
= C. dematium (Pers.:Fr.) Grove
Black dot disease
Epicoccum nigrum Link
= Epicoccum purpurascens Ehrenb.
Black mildew
Schiffnerula cannabis McPartland & Hughes
Brown blight
Alternaria alternata (Fr.:Fr.) Keissl.
= A. tenuis Nees
Brown leaf spot and stem canker
Ascochyta spp.
A. prasadii Shukia & Pathak
Phoma spp.
Didymella spp. [teleomorph]
P. exigua Desmaz.
P. glomerata (Corda) Wollenweb. & Hochapfel
P. herbarum Westendorp
Charcoal rot
Macrophomina phaseolina (Tassi) Goidanich
Cladosporium stem canker
Cladosporium cladosporioides (Fresen.) De Vries.
C. herbarum (Pers.:Fr.) Link
Mycosphaerella tassiana (De Not.) Johan. [teleomorph]
Curvularia leaf spot
Curvularia cymbopogonis (C. W. Dodge) Groves
& Skolko
C. lunata (Wakker) Boedijn
Cochliobolus lunatus Nelson & Haasis [teleomorph]
Cylindrosporium blight
Cylindrosporium spp.
C. cannabinum Ibrahimov
Damping-off
Botrytis cinerea Pers.:Fr.
Botryotinia fuckeliana (de Bary) Whetzel [teleomorph]
Fusarium oxysporum Schlechtend.:Fr.
F. solani (Mart.) Sacc.
Nectria haematococca Berk. & Broome [teleomorph]
Macrophomina phaseolina (Tassi) Goidanich
Pythium aphanidermatum (Edson) Fitzp.
P. debaryanum auct. non Hesse
P. ultimum Trow
Rhizoctonia solani Kühn
Thanatophorus cucumeris (A. B. Frank) Donk
[teleomorph]
= Pellicularia filamentosa (Pat) D. P. Rogers
Downy mildew
Pseudoperonospora cannabina (Otth) Curzi
P. humuli (Miyabe & Takah.) G. W. Wils.
Fusarium foot rot and root rot
Fusarium solani (Mart.) Sacc.
Fusarium stem canker
Fusarium sulphureum Schlechtend.
Gibberella cyanogena (Desmaz.) Sacc. [teleomorph]
= G. saubinett (Mont.) Sacc.
Fusarium wilt
Fusarium oxysporum Schlechtend.:Fr. f. sp. cannabis
Noviello & W. C. Snyder
F. oxysporum Schlechtend.Fr. f. sp. vasinfectum (Atk.)
W. C. Snyder & H. N. Hans.
Gray mold
Botrytis cinerea Pers.:Fr.
Hemp canker
Sclerotinia sclerotiorum (Lib.) de Bary
Leptosphaeria blight
Leptosphaeria cannabina Ferraris & Massa
L. woroninii Docea & Negru
L. acuta (Fuckel) P. Karst.
Olive leaf spot
Cercospora cannabis K. Hara & Fukui
Pseudocercospora cannabina (Wakef.) Deighton
Ophiobolus stem canker
Ophiobolus cannabinus Pass.
O. anguillidus (Cooke in Cooke & Ellis) Sacc.
Phoma stem canker
Phoma herbarum Westendorp.
P. exigua Desmaz
Phomopsis stem canker
Phomopsis cannabina Curzi
P. achilleae (Sacc.) Hohn.
Diaporthe arctii (Lasch) Nitschke var. achilleae
(Auersw.) Wehmeyer [teleomorph]
Phymatotrichum root rot (Cotton root rot)
Phymatotrichopsis omnivora (Duggar) Hennebert
= Phymatotrichum omnivorum Duggar
Pink rot
Trichothecium roseum (Pers.:Fr.) Link
= Cephalothecium roseum Corda
Powdery mildew
Leveillula taurica (Lév.) Arnaud.
Oidiopsis taurica Salmon [anamorph]
Sphaerotheca macularis (Wallroth:Fr.) Lind
= S. humuli (DC.) Burrill
Oidium sp. [anamorph]
Red boot
Melanospora cannabis Behrens (secondary on hemp canker)
Rhizoctonia soreshin and root rot
Rhizoctonia solani Kühn
Rust
Aecidium cannabis Szembel
Uredo kriegeriana Syd. & P. Syd.
Uromyces inconspicuus Otth
Southern blight (Sclerotium root and stem rot)
Sclerotium rolfsii Sacc.
Athelia rolfsii (Curzi) Tu & Kimbrough [teleomorph]
Stemphylium leaf and stem spot
Stemphylium botryosum Wallroth
Pleospora tarda E. Simmons [teleomorph]
S. cannabinum (Bachtin & Gutner) Dobrozrakova et al.
Tar spot
Phyllachora cannabidis (P. Henn.)
Tropical rot
Lasiodiplodia theobromae (Pat.) Griffon & Maubl.
= Botryodiplodia theobromae Pat.
Twig blight
Dendrophoma marconii Cav.
Botryosphaeria marconii V. Charles & Jenkins
[teleomorph]
Verticillium wilt
Verticillium albo-atrum Reinke & Berthier
V. dahliae Kleb.
White leaf spot
Phomopsis ganjae McPartland
Yellow leaf spot
Septoria cannabis (Lasch) Sacc.
S. cannabina Peck
NEMATODE DISEASES
Cyst
Heterodera humuli Filipjev
H. schachtii Schmidt
Needle
Paralongidorus maximus (Butschli) Siddiqi
= Longidorus maximus (Butschli) Th. & Swang.
Root-knot
Meloidogyne incognita (Kofoid &White) Chitwood
M. javanica (Treub) Chitwood
Stem
Ditylenchus dipsaci (Kühn) Filipjev
VIRAL DISEASES
Alfalfa mosaic & Lucerne mosaic
genus Alfamovirus, Alfalfa mosaic virus (AMV)
Arabis mosaic
genus Nepovirus, Arabis mosaic virus (ArMV)
Cucumber mosaic
genus Cucumovirus, Cucumber mosaic virus (CMV)
Hemp mosaic
genus ?, Hemp mosaic virus
Hemp streak
genus ?, Hemp streak virus
PHYTOPLASMAL DISEASES
Witches' broom
DISEASES CAUSED BY PARASITIC PLANTS
Broomrape
Orobanche ramosa L.
Dodder
Cuscuta europaea L.
C. pentagona Eng.
MISCELLANEOUS DISEASES OR DISORDERS
Fasciation
Cause undetermined
Grey fleck
Magnesium deficiency
Tipburn & leaf margin necrosis
Potassium deficiency