Category: Pest and Diseases

Damage
-Various species of thrips can damage grape vines shoots, leaves, and fruit. Two species
most commonly found on grapes. Continue reading “Thrips”

The impact of fan leaf degeneration varies with the tolerance of the cultivar to the virus. Tolerant cultivars produce fairly good crops. Sensitive cultivars are severely affected, showing progressive. decline of the vines, low yields (up to 80% losses) and low fruit quality shortened productive life of the vineyard, low proportion of graft take, reduced rooting ability of propagation material, and decreased resistance to adverse climatic factors. Continue reading “Fan leaf Degeneration”

The citrus nematode is considered one of the most pathogenic V nematode species on grape. Vigor IS remarkably reduced, and affected plants do not have resilience to withstand stressful conditions. Yields gradually and inevitably decline, and vineyards become uneconomical. Continue reading “Citrus Nematodes”

Root-knot nematodes seldom kill vines; more often, plants decline in vigor and are more
susceptible to stress. For example, severe leaf burn and even berry damage may occur on nematode-infested vines when hot weather closely follows sulfur treatments because the plants are unable to move enough water quickly enough to compensate. Continue reading “Root-Knot Nematodes”

The bacterial disease crown gall occurs on over 600 species of dicotyledonous plants. One of the earliest reports of this disease was on grapevines in France in 1853, and its infectious nature was first demonstrated by Carvara in Italy in 1897. By the early 1900s, Continue reading “Crown gall – Disease Caused by Bacteria”

(Dead Arm Disease)
The disease is especially destructive in regions where the climate following bud break may keep grapevines wet by rain for several days. Continue reading “Phomopsis can and leaf spot”

-Diplodia cane dieback kills canes, spurs, arms and trunk wood. The casual fungus may
also initiate a fruit rot in some vineyards. Continue reading “Diplodia cane Dieback and Bunch Rot”

Botrytis bunch rot or gray exists in all vineyards in the world. The disease becomes very
important with phylloxera insect.
– The disease seriously reduction in yield may be associated with the premature drop of bunches from stalk rot or with loss of juice and the desiccation of berries. Continue reading “Botrytis Bunch Rots and Bligh”

Phytophthora Crown and root rot occurs throughout the grape-producing regions of the
world. Continue reading “Phytophthora Crown and Root Rot”

The Causal organism Phymatotrichum omnivorum Continue reading “Phymatotrichum Root Rot”