Ascochyta blight, black spot
Mycosphaerella pinodes (Ascochyta pisi, Ascochyta fabae)
Ascochyta blight, sometimes called black spot, causes a purplish-black discolouration and streaking of the lower stem. Severe stem infections may also cause stem or foot-rot which kills the plant.
Conspicuous spotting of the leaves and pods also occurs. The leaf spots may be either small, irregular, dark-brown and scattered over the leaf, or a few large, circular brown spots. Spots on the pods may coalesce to form large, sunken, purplish-black areas.
Infected seeds may be discoloured and appear purplish-brown. Discolouration is usually more pronounced on those areas of the seed coat next to diseased areas on the surface of the pod. Lightly infected seed may appear healthy.
Pesticides
Cupro Isagro 375 WG
intensity: ★★★
Dithane Rainshield Neo Tec
intensity: ★★★
Isacop
intensity: ★★★
Kocide Blue Xtra
intensity: ★★★
Neoram 375 WG
intensity: ★★★
Ospray Copper Oxychloride-WP
intensity: ★★★
Polyram DF
intensity: ★★★
Rotam Winner Mancozeb WP
intensity: ★★★
tradewyns Blu-Cop 400DF
intensity: ★★★
Uniguard 500 WP
intensity: ★★★
Frenta 750 WG
intensity: ★★
Manzate DF
intensity: ★★
Penncozeb
intensity: ★★
Mancoflo
intensity: ★
Arysta LifeScience Copper Oxychloride 50 WP Fungicide/Bactericide
intensity: N/A
Arysta LifeScience Copper Oxychloride WP Fungicide/Bactericide
intensity: N/A
Arysta LifeScience Mancozeb 750 WG
intensity: N/A
Barrack 720
intensity: N/A
Barrack Betterstick
intensity: N/A
Blue Shield DF
intensity: N/A
Copper Oxychloride
intensity: N/A
Evershield Seed Treatment
intensity: N/A
Isagro Neoram 375 WG
intensity: N/A
Liquicop
intensity: N/A
Manco 750 WG
intensity: N/A
Mancoflo 420 SC
intensity: N/A
Manzeb
intensity: N/A
P-Pickel T
intensity: N/A
Penncozeb 750 DF
intensity: N/A
Unizeb Disperss 750 DF
intensity: N/A