A very small population can thus cause considerable loss of value. Soft scales feed mostly on leaves and twigs, causing discolouration of foliage,…
there. Damage symptoms Leaf miners cause damage to plants both directly and indirectly. The most direct damage is caused by the larvae mining the leaf…
crops. Even within one crop, different 'formae speciales' may occur and cause different symptoms. This species is the only Fusarium that actually…
and cause primary infection of the leaves. Survival can be several years, up to eight years for several Alternaria spp. Typically, Alternaria causes…
Fusarium, caused by various Fusarium species, causes wilting , stunting and root rot in strawberry plants. Phytophthora Phytophthora, caused by the…
species that cause damage in cultivated crops. Aphids feed on the sap of plants using their piercing-sucking mouthparts. They damage plants by causing…
mildew of Cucurbits General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops like cucumber, cantaloupe, pumpkin,…
Direct damage, caused by sucking of sap is rarely seen. Sometimes, large populations build up on potatoes or other hosts, which can cause growth…
nd plant parts, leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal…
General Sciarid flies constitute the family of Sciaridae. The species that cause most damage to crops belong to the genera Bradysia and Lycoriella .…
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