6

I am growing scotch bonnet, jalapeno and cayenne pepper plants indoors from seed. The scotch bonnet plants have what looks like white fur growing around the veins on the underside of their leaves. This is accompanied on some leaves by small hard white spots.

This is not visible on all plants, the plants that do show this fur seem to be suffering, some of their leaves have become soft and are rolling up. Neither the fur or the small white specs move when I rub them with my fingers, they remain on the leaf.

Can anyone help me identify the problem?

enter image description here

enter image description here

Update: 04/08/14 20:42

More pictures, the same leaf top and bottom:

enter image description here enter image description here

  • 1
    You are welcome :) I hesitated because the hairs were too long to be Leveillula taurica (Lev.) Arnaud G. (powdery mildew). Could you use tweezers and pull some hairs to see if it is some kind of scale insect? – BYJ Aug 4 '14 at 20:10
  • 1
    I just discover that I can see the pictures at full-size. Some colleagues and I have been discussing and the hairs seem to be a characteristic of the plant (perhaps a remnant from crosses between species). – BYJ Aug 5 '14 at 17:19
  • @ondoteam I don't think it is genetic, or part of the plant, or it would be much more uniform. – J. Musser Aug 6 '14 at 1:19
  • @J.Musser I think the uniformity is not a must. In a couple of hours I will get some pictures from my colleague. – BYJ Aug 6 '14 at 7:35
  • @J.Musser botanicayjardines.com/images/Capsicum.jpg – BYJ Aug 6 '14 at 8:55
6

Those white hairs (marked in green) are trichomes, which are a perfectly normal part of the plant.

The little spots (marked in red) however look like edema, which indicate too much moisture or over-watering.

Trichomes and Edema

Try watering them less, or less often (mine do well with being watered only every other day) and since you're growing indoors, air the room regularly (a hygrometer can be useful too).

  • 1
    +1 Note that edema should be visible in the upperside too. – BYJ Aug 6 '14 at 7:16
  • Thanks @ondoteam, great resources. I will reduce watering and air the room more often. – Dean_0 Aug 10 '14 at 13:28

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.