HORTICULTURE

Detailed explanation-1: -The blight injures plants by forming blockages in xylem and phloem, inhibiting resource distribution and resulting in plant die-back and smaller fruit yields. As of 2020 there is no cure for the blight, and neither the causal agent nor spreading mechanism is known.

Detailed explanation-2: -Symptoms of dieback caused by Colletotrichum included chlorosis, crown thinning, necrotic blotches on leaves, blight and frequently gummosis of apical twigs, shoot and branch dieback [6].

Detailed explanation-3: -Citrus canker is a citrus disease caused by a bacteria. While not harmful to humans, canker significantly affects the vitality of citrus trees, causing leaves and fruit to drop prematurely.

Detailed explanation-4: -Citrus greening is spread by a disease-infected insect, the Asian citrus psyllid (Diaphorina citri Kuwayama or ACP), and has put the future of America’s citrus at risk. Infected trees produce fruits that are green, misshapen and bitter, unsuitable for sale as fresh fruit or for juice.