(IPPM) in Vegetables - Vegetableipmasia.org

Resource Manual on IPPM in Vegetable
World Education Philippines, Inc.
Host pictured: Thysanoplusia orichalcea
Host range: Loopers in the subfamily Plusiinae
Description: Infected larvae climb to the tops of the plants and attach by their prolegs
before they die. The larvae die in the late afternoon and sporulation occurs throughout
the night. Spores are white and oval. A freshly killed larva has a very fine growth of
light tan colored hyphae over the entire surface with tufts of longer white hyphae
emerging from the ventral surface. As sporulation progresses, the color changes to
brown and then dark brown and the cadaver becomes wrinkled and collapsed. At this
stage the cadaver resembles that of a virus-killed larva, but can be distinguished by the
masses of white spores clinging to the setae. This fungus is an important regulating agent
in looper populations. It can cause extensive mortality when larval populations are high.
Name: Entomophaga grylli (Fresenius) Batko
Host pictured: grasshopper [Ailophus thalassinus tamulus (F.)]
Host range: Most grasshopper species
Description: Infected grasshoppers cling to upper portions of
plants before they die. Clumps of spore-producing hyphae grow
through intersegmental membranes. Spores are large, pear-shaped,
and white. E. grylli occasionally causes extensive mortality in
grasshopper populations.
Name: Zoophthora radicans (Brefeld) Batko
Host pictured: Plutella xylostella
Host range: Wide host range
Description: This fungus infects larvae, pupae, and
adults of P. xylostella. It forms an extensive flat mat of
external hyphae which grows out from both sides of the
larva. Numerous white spores are formed on and ejected
from this mat. Spores are elongated and spindle-shaped,
with a cone-shaped point at the base and rounded at the top.
Name: Zoophthora radicans (Brefeld) Batko
Host pictured: Cabbage aphid
Host range: Wide host range
Description: Z. radicans is also a common pathogen in
aphid populations. Dead aphids are attached to the leaf
surface by many thin fungal structures that grow out from
the lower surface of the aphid. The fungus forms a white to tan-colored hyphal mat over
the top of the aphid on which numerous white spores are produced. Spores are elongated
and spindle-shaped with a cone-shaped base and a rounded point.
Name: Unidentified Entomophthorales
Host pictured: Trialeurodes vaporariorum
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