pest damaged cucumber leave caused by harmful insects, plant fungi, thrips and other diseases

cucumber verticillium pathology illness blemish bacterium spot fungal disease fusarium bacteria pathogen virus infestation infected agriculture leaf pythium pest twig damaged parasite bacterial dry defeat problem harm pesticide sick garden rhizoctonia horticulture fungus blight foliage mushroom deficiency plant vegetable insects viral mildew farming leaves moisture greenhouse peronosporoz phytophthora infestans