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…
male nymph forms a dark brown ‘prepupa’ from which a pupa rapidly develops, inside a white cottony cocoon. Females undergo little changes in form,…
3 mm long. They quickly attach themselves to the plant and form a scale. Colonies mainly form on the underside of leaves. After 1 to 2 months, the…
third nymphal instar onwards are covered with a white waxy material in the form of powder, threads, spiky projections or platelets. Eggs are laid in a…
pairs of prolegs; one pair of prolegs protrudes from the posterior end, forming a distinctive 'V' shape. Throughout their development, larvae remain…
Hemiptera Aphids What are aphids? Aphids form a single, very large group of insects: the super- family Aphidoidea, belonging to the order Hemiptera .…
Cotton aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses…
peach aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When reproduction is…
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