Pierce's disease of grapevine

(peach and plum) and citrus, where it causes diseases such as Pierce's disease of grapevines, phony peach disease, plum leaf scald, citrus variegated chlorosis [...] foliage becomes thinner, but the trees don’t die of the disease. Olives: Scorch symptoms and desiccation of twigs and small branches occur on infected leaves [...] and the trees die. Life cycle and appearance of Pierce's disease of grapevine The bacteria live in xylem vessels in roots, stems and leaves and multiply

Corn earworm

lays small quantities of eggs, between one and three, in the hairs of green ears of corn. The larvae feed on the hairs of the young corn and on the young kernels [...] flowers and fruit from the host plant, as well as on the corn of immature cobs and ears. Adults of corn earworm are nocturnal, since they react to light radiation [...] open the crop to detect the pest. Life cycle and appearance of the corn earworm The eggs of corn earworm are a milky-white colour, which turn dark grey before

Disease control

Plant Disease Management

What is biological disease control? Biological control of plant diseases is a method used to manage and reduce the impact of plant diseases by utilizing beneficial [...] disrupts disease cycles and reduces the buildup of pathogens in the soil. Disease-resistant varieties Another vital aspect of prevention is the use of dise [...] pathogens Preventing plant diseases Effective prevention of plant diseases involves several key practices. Monitoring Regular monitoring of your plants is vital

Black sigatoka disease

brown and ultimately dies. In cases of severe infection leaves may die within a few weeks. Because of the lack of leaf tissues, fruit maturity is hampered [...] leaf-spot of banana. Damage symptoms Black sigatoka (Mycosphaerella fijiensis ) first causes small, light yellow spots or streaks on leaves of about one [...] hampered. Life cycle and appearance of Black sigatoka disease Black sigatoka ( Mycosphaerella fijiensis ) produces both ascospores and conidia. The ascospores

Blight of pepper

and fruit rot of peppers and other important commercial crops. Damage symptoms Phytophthora causes root rot, seedling damping off and rot of stems, bulbs [...] Plants wilt and the crown leaves drop off. Life cycle and appearance of Blight of pepper Phytophthora species are very destructive organisms belonging [...] readily move through water. This explains why the disease spreads more rapidly when the water content of the soil or substrate is higher than normal or optimal

Black leg of seedlings

infection is the easy stripping of the skin from the root cortex with a finger nail. Life cycle and appearance of Black leg of seedlings Pythium belongs to [...] temperatures and causes among others cereal diseases. Damage symptoms Pythium affects roots, in particular those of seedlings. Infected plants lag in growth [...] and very little of the root system survives. On the border between air and soil or substrate the plant turns brown. A typical symptom of a Pythium infection

Root rot of carrot

exhibit by necrotic leaf spots Life cycle and appearance of Root rot of carrots The fungus of R. carotae has delicate, simple morphological features hence [...] for acidic conditions may explain the concentration of this disease in the rather acidic soils (of southwestern Norway). Spore germination was inhibited [...] only host plant of the fungus. How to prevent root rot of carrot Studies have shown that 3several key factors influencing the occurrence of blemishes and

Black rot of carrots

appearance of Black rot of carrots Black rot of carrots ( Alternaria radicina ) is a seed-transferred carrot disease. The seeds are the main source of primary [...] infection and this may lead to death of seedlings. From the primary infection of leaves, this type of carrot disease can spread to the flowers (especially [...] crop residues and cause primary infection of the leaves. Survival can be several years, in the case of black rot of carrots ( Alternaria radicina ) up to 8

Bacterial canker of tomato

the disease usually only occurs in the second half of the season. The first symptoms are wilting of the lower leaves and subsequent expansion of the wilt [...] crops of at least two years and alternate with a non-host crop Apply deep-ploughing to stimulate the decay of crop residues Prevent plant diseases by optimizing [...] foot shows whitish ooze with bacteria in the case of C lavibacter infection, but other than that the disease is difficult to distinguish from wilting caused