Phytophthora on summer squash
Phytophthora blight usually starts in summer
squash with die back of the growing tip. Symptoms can also begin at the
plant crown.
Photo courtesy of M.T. McGrath,
Long Island Horticultural Research and Extension Center
Symptoms of Phytophthora blight in summer squash
can progress rapidly from death of the growing tip to total plant collapse
and fruit rot. Affected fruit often are covered with spores of Phytophthora
capsici (sporangia) which look white and yeasty.
Photo courtesy of M.T. McGrath,
Long Island Horticultural Research and Extension Center