Unidentified bumps on pumpkin leaves
Pumpkin The Netherlands
I planted some Curbita Maxima seeds in late March this year indoors due to cold weather conditions hoping to be able to make the best of a short growing season (in the Netherlands) but have noticed 1-2 leaves have had a couple of odd looking bumps appearing on the leaves. I initially freaked out, thinking this could have been a moth/worm of some sort but quickly realized that the underside did not have the same and the bumps appear to be hollow. Although this has not spread further, Im a little worried this may be a disease that will later cause issues. I've scoured the net for am answer but have not been able to identify what this could be or if it really is something to be worried about. Has anyone seen this before or know what this could be?
Bumps on leaves
Posted
by: uc
(1 point)
Posted: April 27, 2017
Answers
It could be mite damage. Several mites like blister mite, eriophyid mite, erineum mite etc., causes eruptions/blisters/galls on the upper surface of leaves whereas the lower surface of this structure appear hollow. You can see the mite colony using hand lens in this hollow surface. Normally this mite won't cause major loss, but can be easily treated by spraying dormant oils.
Green galls caused by blister mite on the upper surface of grape leaves
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: April 28, 2017
Thanks Dr Narayana! :) The bumps did not appear to spread to the other leaves, but to be certain, I've made some dormant oil and sprayed the plants before weathering them and potting them outdoors. So far, no further damage! :)
Posted
by: uc
(1 point)
Posted: May 9, 2017
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UC, have you noticed any more of the bumps appearing? Or any insects on the plant? almost 7 years ago.
The bumps have more or less subsided. They seem to have disappeared on their own, but I've also applied dormant oil, just in case there were eggs. almost 7 years ago.