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the stomata or directly through the cuticle. On the lesions, pycnidia are formed from which orange-red masses of two-celled conidia are exuded. Secondary
second and third leaf and subsequently on other leaves. Yellow stripes are formed at the base of the leaf and the leaf sheath. They gradually extend and become
blackberry aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes
Rose aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes
generations of females. The strawberry aphids overwinter as parthenogenetic forms. There is no sexual stage and no eggs are laid. Adult wingless females of
raspberry aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes
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conditions, the spots may merge with lesions on the petioles and stems and form long dark streaks. On fruits, first small black specks are seen on green
material. Infection also takes place via wounds. After infection, galls are formed which break open, releasing many bacteria. These are dispersed by rain and