Caused by : Colletotrichum orbiciulare
It is one of the serious diseases of Cucumber which attacks all the plant parts.
Yellowish circular spots having grey centre can be found on the leaves. We can also find yellow sunken spots on the fruits. Plants growth and yield will be decreased due to this.
Use fungicides like Ziram, Acrisio which effectively controls this disease
Parijat Shapat can also prevent anthracnose disease in cucumber
Caused by : Erwinia tracheiphila
Vascular tissues of the plants are mostly affected. Yellowing and drying of the leaves and twigs can be seen. Blighted appearance on the leaves. Later plants will immediately wilt and leads to death of the plant.
Drench with Carbendazim 0.1%
Spray COC to control wilt disease
Drench with Redomil gold
Caused by : Erysiphe cichoracearum
On the upper surface of the leaves white powdery mass can be seen. Growth of the plant is hindered. Later the leaves starts to wither and finally the whole crop will be lost.
Application of Carbendazim @ 2g/lit of water
Spray fungicides like Chlorthalonyl, Benomyl etc.
Caused by : Cucumber mosaic virus
Irregular yellowing of leaves can be seen. Leaves starts to bend down and the fruit knobs starts turning pale/yellow colour. Finally Plants become stunted. It is transmitted by aphids.
Use insecticides like Shine @ 2.5ml/lit
Bio product like Bio R 303 can also be used @ 1.5 ml/lit
Imidachloprid and Willomax can be used to control this disease.