Hi Master Gardener, there is a problem in my watermelon plants.it is almost a...
Hi Master Gardener, there is a problem in my watermelon plants.it is almost a month and the watermelon has been in a good condition but am now observing that the leaf petiole are collapsing,wilt and then dries.what disease is that and how do i controll it.Thanks in Advance. Ben
Outside United States
Ben, Based on your description, your plants may have Bacterial Wilt which affects melons and cucumbers .
Here is info I extracted from our Vegetable Gardening Booklet: http://extension.psu.edu/plants/vegetable-fruit/production-guides/vegetable-gardening/Cucurbits.pdf This booklet also has other diseases listed so you can review them all to see if one fits your issue better than another.
Bacterial wilt, which is transmitted by cucumber
beetles during feeding, causes plants to wilt and
die. Look for the presence of beetles and/or beetle
chewing injury to help diagnose bacterial wilt.
Bacterial wilt is most severe on melons and cucumbers,
but this disease will infest some squash
and pumpkin plantings. The disease is characterized
by the wilting and drying of individual
leaves. The leaves may wilt and recover during
the night several times before finally dying.
Management: Use protective coverings such as
a floating row cover to keep beetles off young
plants (4–5 weeks old) when they are most susceptible
to infection. Since the plants require
pollination by an insect, remove the protective
covering when plants begin to bloom and
the threat of bacterial wilt has decreased. See
cucumber beetle in the previous section.