These blue and red beetles lay their eggs on the fern. The larvae chew on the fern causing the stem to turn brown and reducing the yield the next year. Damage can be done especially to first and second...
This dark fly with light spots on its wings can be easily recognized on a field of asparagus. The flies are active from the end of April to the beginning of July. Only one generation appears per year. They lay their eggs in the tips of th...
Delia Platura lay their eggs inside the stems during the harvest season. The larvae eat holes into the stems, thereby making them unsuitable for consumption. Some years the crop is affected by this insect, some years it is not.
This fungal disease starts in spring as rusty oblong orange patches on the base of the stems. In the summer these reddish-brown pustules spread all over the fern. In autumn the foliage turns brown and drops. The affected stems and stem parts die.
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