Preventing the introduction and establishment of invasive species is always the best--and least costly--method of control.

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Preventing the introduction and establishment of
invasive species is always the best--and least
costly--method of control.
2
Pest Exclusion is the Key

• First step in the pest prevention battle
• Every dollar spent on pest exclusion saves 17
  (24 in 2006) in control or eradication costs.
• Avoids habitat destruction and native species
  loss
• Excluding pests avoids additional pesticides in
  our urban and natural environments
• Pest free agricultural production is essential to
  Californias economy
• Adjusted for Inflation (US Bureau of Labor
  Statistics, Consumer Price Index, 2006)
• Congressional Office of Technology, Harmful
  Non-indigenous Species in the US, 1993
• Shaded areas on any of the maps that follow
  illustrate the detection/presence of a pest
  within a particular states political boundaries
  and do not necessarily indicate its known range
  within that state.

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Citrus canker is a highly
contagious and devastating
disease
caused by bacteria.
Movement of infected plants,
seedlings, plant cuttings and fruit risks
spreading this disease from one state to another.
4
A new pest here (and an old one
in its home country of China),
the Asian longhorned
beetle is a
serious threat to hardwood trees and has no known
predators in the U.S. It can be spread via live
plants, wooden packaging material and in timber.
5
Gypsy moth is an important pest
of hardwoods and has an
extensive ecological
range. Life stages
of the insect can hitchhike on items moving
long distances, such as nursery stock, vehicles,
forest products and outdoor household items.
6
Japanese Beetle
Japanese beetles are known to
feed on at least 295 species of
plants in the U.S.
Larval damage to plants occurs belowground and
from adults aboveground. Beetles are routinely
intercepted on ships and aircraft and also found
in agricultural produce and soil.
7
Emerald Ash Borer
The larvae of this Asian beetle
feed on the cambium layer of
ash trees,
between the bark
and wood, eventually killing branches and
entire trees. The insect can be spread via
nursery plant shipments.
8
French Tamarisk
Also known as saltceder, tamarisk is an
aggressive competitor against native
plants, developing into monocultures
that are suspected of
lowering water tables and modifying wetlands and
wildlife habitats.
9
Diaprepes root weevil is native
to the Caribbean and is a
serious
pest of citrus, ornamental plants and some crops.
A single female can lay up to 5,000 eggs. This
beetle can be transported accidentally via plants
or soil.
10
Quagga Mussel
Dreissena species, including the
closely related quagga and zebra
mussels, are less than an inch
long but reproduce by
the millions. These rapidly spreading invaders
can coat nearly every available surface, clog
pipelines, damage machinery, harm fishery
resources, change ecosystems, and foul water with
their waste.
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Considerations

• Investment in pest exclusion efforts is
  essential.
• Agriculture, the environment, our natural
  resources and our citizens all stand to benefit.
• Exclusion reduces the need for pesticides.
• Our pest prevention system is straining to keep
  pace with invasive species.