Introduction to Plant Pests. For AgEd 410. Original Created By Margaret Chapman. Spring 1999. Cal Poly, San Luis Obispo Copied from Cal Poly. Modified by Georgia Agriculture Education Curriculum Office June 2002. Four main groups of plant pests:. 1. Weeds. 2. Invertebrates.
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For AgEd 410
Original Created By Margaret Chapman
Cal Poly, San Luis Obispo
Copied from Cal Poly
Modified by Georgia Agriculture Education Curriculum Office
4. Disease Agents
* Organisms that compete with people for food or fiber, interfere with raising our crops and livestock.
* Proper identification is important
in controlling pests.
* Adapt well to local
climates and soils and
can compete successfully
with cultivated plants.
* Undesirable plants, sometimes defined as “any plant growing out of place.”
produce a large
number of seeds.
* Some weed seeds
can remain dormant
for 20 years before
to eradicate, because some have
vegetative means of reproduction in
addition to seeds.
* Weeds compete with
agricultural crops for
water, nutrients, light
operations, and can harbor insects
and plant diseases.
* Some weeds are toxic to livestock.
weeds is to compare them
to colored photographs and
* Become familiar with
plant classification system
and the weeds physical
stages,and life cycles.
weed and other pest
control measures in
* Includes insects and their relatives,
nematodes, snails and slugs.
* “Invertebrate” signifies animals
without backbones (no vertebrate).
thorax and abdomen and six legs.
two body parts and eight legs.
unsegmented worms that can be
prefer cool, moist surroundings.
* Animals with backbones
* Includes fish ,amphibians, reptiles,
birds and mammals.
* Most of our concern is with birds
* Harbor pathogens, disease
* Eat or damage crops
* Cause damage to buildings
* Make too much noise
with people, or cause harm to crops
* Animal pests are similar to weeds,
those that are out of place are considered
are caused from:
* Cause disease in plants and animals.
* Many are submicroscopic, making
* If you can’t see the pest, then it may
be identified by the type of symptoms
caused or damage done.
Bacterial citrus canker
symptoms on citrus leaves
* Scab symptoms on
orange fruit caused by the
fungus Elsinoe fawcetti
* Citrus tristeza Virus
* Potato Virus on
veins and shoots
* Energy, time and expense to combat
* Losses of food to our world food supply
can become disastrous.
* Farmers are focusing on controlling
pests while dealing with environmental
evolve each day to keep our crops healthy