• Black root rot of cucurbits

  January 1, 1970

  from other wilt diseases. The fungus can also cause black fruit rot. Life cycle and appearance of Black root rot of cucurbits Phomopsis sclerotioides [...] adverse conditions for years in the soil, but little else is known about the life cycle. The fungus is dispersed by water, air and soil particles. How to prevent

• Fusarium head blight or scab

  January 1, 1970

  cereals, such as wheat (fusarium head blight wheat) and post-harvest decay. Life cycle and appearance of Fusarium head blight or scab Most Fusarium species only [...] also produce ascospores. In general, most Fusarium specieshave a similar life cycle. Fusarium overwinters for many years in the soil and on crop residues

• Yellow rose aphid

  January 1, 1970

  viruses attacking strawberries and roses. Life cycle and appearance of Yellow rose aphid Aphids have a complex life cycle, with both winged and wingless forms

• Woolly apple aphid

  January 1, 1970

  be a nuisance at harvest time. Life cycle and appearance of Woolly apple aphid In contrast to other aphids , the life cycle and survival from year to year

• Tomato russet mite

  January 1, 1970

  the plant and moves upwards as the mites ascend. Life cycle and appearance of tomato russet mite All life stages of the tomato russet mite are extremely [...] about 0.1 mm long. They usually develop to the 2nd stage within a day. All life stages look very similar. The adults develop after about two or three days

• Long-tailed mealybug

  January 1, 1970

  A very small population can thus cause considerable economic damage. Life cycle and appearance of long-tailed mealybug The long-tailed mealy bug is easily [...] two or three weeks, a female produces 100-200 nymphs. In the summer, the life cycle takes about six weeks to complete and in the winter about 12 weeks.

• Cotton aphid

  January 1, 1970

  leaves is reduced, affecting production. Life cycle and appearance of Cotton aphid Aphids have a complex life cycle, with both winged and wingless forms of

• Tobacco aphid

  January 1, 1970

  nicotianae ) can also transmit viruses. Life cycle and appearance of Tobacco aphid Aphids have a complex life cycle, with both winged and wingless forms of

• Sciarid flies

  January 1, 1970

  humid and well-watered are particularly at risk. Life cycle and appearance of Sciarid flies The life cycle of sciarid flies has the following stages: egg [...] with sucking mouth parts, but they hardly feed at all during their short life. The males are usually smaller than the females. They are not fast fliers

• Bugs

  January 1, 1970

  produce a pungent odour. Heteropteran bugs are hemimetabolous insects. Their life cycle consists of an egg, usually five nymphal instars and the adult insect