If you want to harvest plenty of asparagus, you must always keep an eye on the vegetables because the plant is susceptible to diseases and pests. But don't worry - you can protect your plants.© Gundolf Renze - Fotolia.com Having your own asparagus in the garden is something very special. So you don't have to queue in the morning to get reasonably fresh asparagus. And you are not exposed to the price increase. Your own asparagus also means a lot of work, so you will probably enjoy it quite differently. If you decide to grow asparagus, you should always look carefully at your perennials, because you are threatened by many enemies. With optimal care and the right remedies, the asparagus quickly recovers and you can look forward to a lavish harvest.
Common asparagus diseases and pests
The asparagus grate is particularly worth mentioning for diseases. This is a fungus in which the spores infest the asparagus herb and destroy the leaves. The leaves first get orange-red, then brown spots and then the shoots die.
Asparagus rust cannot be combated with natural means. It only helps to use an effective fungicide (such as this one). You can prevent the asparagus grate by not placing the individual plants too close together. Moisture on the leaves should always dry quickly, so an airy location is important.
Root rot is also a common asparagus disease. The cause is a fungus (fusarium), which is present in every soil, but only strikes when the soil is permanently too moist. A loose, sandy earth and a good drainage prevent waterlogging, so that root rot cannot arise in the first place.
Above ground, you can recognize the disease from the fact that the plants sprout very poorly. The roots are black and rotten on the inside. The asparagus shrubs then shrink.
Root rot in asparagus is almost impossible to treat; prevention with a well-ventilated floor is the only choice for amateur gardeners.
Typical asparagus pests
The asparagus fly can be observed especially in new plants. From April onwards, she lays her eggs on the tips of the young shoots. The hatched larvae feed on the shoots, which then quickly die. Asparagus flies multiply massively, as a remedy there are special casting preparations (such as this one). As a prevention, you can stretch fine-meshed nets over the asparagus beds. This is particularly useful for green asparagus. White asparagus is protected by the mound of earth or additional foil.
Asparagus beetle and asparagus chicken
Asparagus chickens have black wings with red edges, on the wings there are four or six white spots. The asparagus beetle is orange and has twelve black dots on the wings. Both beetles will be active from May and lay their larvae on the shoots. Above-ground parts are particularly at risk. Asparagus plants that are protected by accumulated soil and foil are hardly affected.
As a countermeasure, it usually only helps if you collect the pests. The beetles are easy to spot. The faster you intervene, the better you prevent the beetles from multiplying and appearing again next year. Insecticides should not be used on edible vegetables in the garden.