rogersii Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction…
the other mating type so that H-shaped structures are formed. These can germinate directly or form secondary sporidia. These sporidia infect the wheat…
of Hemispherical scale An adult female of S. coffeae has a hemispherical form with a smooth surface. The colour is usually dark to sometimes lighter…
cycle and appearance of Apple scab Venturia inaequalis overwinters in the form of unripe fruiting bodies in infected fallen leaves or in lesions on…
the side roots are formed or through other similarly damaged spots. On the infected plant, new sporangia with zoospores are formed, that allow the…
content over a prolonged period of time. The sclerotia germinate directly and form mycelium or produce apothecia (fruiting bodies) containing…
Tobacco aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When reproduction is…
Potato aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When reproduction is…
male nymph forms a dark brown ‘prepupa’ from which a pupa rapidly develops, inside a white cottony cocoon. Females undergo little changes in form,…
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