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Runner Bean Halo Blight

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Just had to burn this years runner bean plants :cry: as they were infected with halo blight. Never had it before and the standby plants in the greenhouse, from the same seeds, are showing no signs, so it's not carried by the seed. How would I have got it?


I have also burnt the canes just in case.

Comments

  • madjackslam
    madjackslam Posts: 280 Forumite
    Part of the Furniture 100 Posts Combo Breaker
    According to the RHS

    Halo spot/blight is a bacterial disease carried on the bean seeds,
    which causes the leaves to have brownish, water-soaked
    spots that are surrounded by a yellow halo. There are no
    remedies, so infected crops should be destroyed, but using
    fresh seed from a reputable supplier should avoid the
    problem.

    https://www.rhs.org.uk/Plants/PDFs/Plant-trials-and-awards/Plant-bulletins/runnerbeans.pdf
  • Crinkmeister
    Crinkmeister Posts: 473 Forumite
    Thanks Jack - however, if the disease was carried in the seed, why are the plants in the greenhouse not affected? Seed from same packet, sown at the same time, in the same compost in the same (intially) greenhouse?
  • madjackslam
    madjackslam Posts: 280 Forumite
    Part of the Furniture 100 Posts Combo Breaker
    I don't know. Although this Wikipedia article suggests that the disease tends to develop in cold, rather than hot, conditions, which would fit with what you've found.
  • Living_proof
    Living_proof Posts: 1,923 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    It sounds more like a blight-type condition to me. My runner beans were fine but French beans failed on the first sowing, despite being regularly watered. Wilko replaced them and the second lot have come through within days.
    Solar Suntellite 250 x16 4kW Afore 3600TL dual 2KW E 2KW W no shade, DN15 March 14
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