Organic broccoli is becoming increasingly popular with Swiss consumers. At the same time, broccoli has developed into a very demanding and risky crop when grown under organic conditions. In recent years, there have been major crop failures due to head rot (of bacterial and fungal origin), which usually only occurs shortly before harvest or even develops in the packaged product. In addition, the infestation of well-known pests such as flea beetle or whitefly, but also newer pests like swede midge (Contarinia nasturtii) or stink bugs (e.g. Lygus rugulipennis) in broccoli has increased significantly.
The control measures against the various pests and diseases are very limited in organic farming, and some measures might even have adverse effects. The use of crop protection nets, for example, changes the microclimate between the plants, which can lead to heat build-up and, in humid conditions, to increased head rot. Due to the complexity of the problem, a holistic research approach is necessary, which takes into account the influence of individual measures on the most varied of problems in broccoli cultivation. Our research approaches range from indirect plant protection measures such as variety selection, irrigation systems or climate control to direct measures such as pesticide tests, optimized use of nets or the use of repellents.
Procurement and use of the project for Coop: Organic broccoli is an important product in the fresh vegetable segment of Coop. The aim of the project is to improve quality and ensure the supply of Swiss organic broccoli.
Project leader
