Raphanus raphanistrum (weed)

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Raphanus raphanistrum (click on image to enlarge it)
Author(s): Johannes Everhardus van der Trappen
Source: Wikimedia Commons

Raphanus raphanistrum (weed) L. - (wild radish)

This plant has a world-wide distribution and is an important annual agricultural weed, germinating in spring. The weedy type invading fields belongs to the subspecies R. r. raphanistrum and is likely of Mediterranean origin (Charbonneau et al., 2018). The name wild radish may also refer to Raphanus sativus (cultivated radish) or to the hybrid Raphanus raphanistrum x Raphanus sativus.

R. raphanistrum grows to a height of around 40-60 cm and at high densities, seed production can reach 50,000 seeds per m2. The persistent seed bank results in continuing problems in agricultural fields. Herbicide resistance has been frequently reported.

Vernacular names
• Deutsch: Acker-Rettich
• English: wild radish
• Español: rabaniza
• Français: radis ravenelle
• Português: nabo

Wild radish can invade many different types of crops. For example, cereals are often seriously affected and experience significant yield losses, e.g. see Eslami et al. (2006). It is highly competitive and in canola yield losses can exceed 50% (Blackshaw et al., 2002).

For a review see Warwick & Francis (2005).