Scope & History of BC

Scope and History
of biological control
Scope of BC
• Biological control schemes operate
throughout the world as part of the
management of pests in
• agriculture,
• forestry and
• greenhouse horticulture.
Scope of BC
• Although biological control has
sometimes been introduced to
combat arthropod pests that have
developed resistance to insecticides
and acaricides,
• the first biological control programs
pre-date the modern pesticide era.
Scope of BC
• The intensification of agriculture
through the twentieth century has
been accompanied by
• increased international trade and
• the resultant transfer of pest species
on plants and products across the
globe.
Scope of BC
• In addition,
• the introduction of new crops, and
• consumer demand for ‘blemish-free’
produce,
• have all contributed to an over-
reliance on chemical control, with
the consequences of:
Scope of BC
• pest resistance,
• uneconomic production costs,
• bioaccumulation through food
chains,
• environmental pollution,
• loss of biodiversity and
• risks for human health.
History of BC
• The history of Biological Control
may be divided into 3 periods:
• A. The preliminary efforts when
living agents were released rather
haphazardly with no scientific
approach.
• Little precise information exists on
successes during this time.
• Roughly 200 A.D. to 1887 A.D.;
History of BC
• B. The intermediate period of more
discriminating BC which started with the
introduction of the Vedalia beetle, Rodolia
cardinalis Mulsant, for control of the cottony
cushion scale in 1888.
• Period extended from 1888 to ca. 1955; and
History of BC
• C. The modern period characterized
by more careful planning and more
precise evaluation of natural
enemies.
• Period from 1956 to the present.

History of BC
• A. BC agents were used in augmentation
• 1. Chinese were the first to use natural
enemies to control insect pests (200 A.D to
1200 A.D).
• Nests of the ant Oecophylla smaragdina
were sold near Canton in the 3rd century
for use in control of citrus insect pests
such as Tesseratoma papillosa
(Lepidoptera)
History of BC
• 2. Ants were used in 1200 A.D. for
control of date palm pests in Yemen.
Nests were moved from surrounding
hills and placed in trees.
• 3. Usefulness of ladybird beetles
recognized in control of aphids and
scales in 1200 A.D.
History of BC
• Salient Events of this era:
• Aldrovandi noted the cocoons of Apanteles
glomeratus on a parasitized Pieris rapae in
1602 A.D.
• Van Leeuwenhoek illustrated and discussed a
parasite of a sawfly that feeds on willow in a
publication in 1701.
• The mynah bird, Acridotheres tristis, was
successfully introduced from India to
Mauritius for control of the red locust in 1762.
History of BC
• Hartig (Germany) suggested the rearing
of parasites from parasitized caterpillars
in 1827.
• During the 1840's releases of predators
were used for control of the gypsy moth
and garden pests in Italy.
• Asa Fitch (New York) suggested importing
parasites from Europe to control the
wheat midge, Contarinia tritici, in 1856.
History of BC
• First practical attempt at BC of weeds
occurred in 1863,
• when segments of the prickly pear
cactus, Opuntia vulgaris, infested with
the imported cochineal insect,
Dactylopius ceylonicus,
• were transported from northern to
southern India.
History of BC
• C. V. Riley Successfully moved parasites
from Kirkwood, Missouri, to other parts
of the state for control of the weevil
Conotrachelus nenuphar in 1870.
• LeBaron transported apple branches
infested with oyster-shell scale
parasitized by Aphytis mytilaspidis from
Galena to Geneva, Illinois in 1871.
History of BC
• In 1873 Riley sent the predatory mite,
Tyroglyphus phylloxerae to France to
control the grape phylloxera.
• Trichogramma sp. (egg parasites) were
shipped from the U.S. to Canada for
control of lepidopterous pests in 1882.
• In 1883 the USDA imported Apanteles
glomeratus from England for control of P.
rapae.
History of BC
• B. The Intermediate Period (1888 to 1955):
• Cottony cushion scale, Icerya purchasi
Maskell, was managed by using
Cryptochaetum iceryae and Rodolia
cardinalis (the vedalia beetle). introduced
into California in ca. 1868 imported from
Australia.
• Howard conducted foreign exploration in
Europe and arranged for parasites to be
imported to the U.S. for Gypsy Moth control.
History of BC
• First published work on BC of weeds in
1902 in Hawaii for control of Lantana.
• USDA laboratory for biological control
established in France in 1919.
• The Imperial Bureau of Entomology
created the Farnham House Laboratory
for BC work in England in 1927.
History of BC
• From 1930 to 1940 there was a peak
in BC activity in the world with 57
different natural enemies established
at various places.
• World War II caused a sharp drop in
BC activity.
• In 1947 the Commonwealth Bureau
of Biological Control was established
History of BC
• In 1951 the name was changed to the
Commonwealth Institute for Biological
Control (CIBC).
• In 1955 the Commission Internationale
de Lutte Biologique contre les Enemis
des Cultures(CILB) was established.
• This is a worldwide organization with
headquarters in Zurich, Switzerland.
History of BC
• This organization is also known as the
International Organization for Biological
Control (IOBC).
• IOBC initiated the publication of the
journal “Entomophaga” in 1956,
a journal devoted to biological control of
arthropod pests and weed species.
History of BC
• C. The Modern Period (1957 to onward)
• Interest developed in ecology and

the environment after 1962, with the
publishing, by Rachel Carson’s book
“Silent Spring.”
History of BC
• “Silent Spring” helped stimulate the
implementation of the concept of
Integrated Pest Management (IPM) &
• More emphasis was placed on
conservation BC than classical BC.
• In the late 1960’s, and biological control
was seen as a core component of IPM by
some.
History of BC
• In 1964, Paul DeBach and Evert I. Schliner
publish an edited a volume titled
“Biological Control of Insect Pests and
Weeds”.
• During the 1970’s and 1980’s, Brian Croft
and Marjorie Hoy made impacts by using
pesticide resistant natural enemies in
cropping systems.
History of BC
• In 1983, Frank Howarth published
his landmark paper titled “Biological
Control: Panacea or Pandora’s Box”.
• This paper significantly impacted
classical BC efforts by concluding that
classical BC significantly contributed
to extinction of desirable species.
History of BC
• This forced a rethinking of legislative
guidelines as well as introduction
methods.
• Research in this area indicated that many
of Howarth’s claims were unjustified, but
some impacts were discovered.
• No species extinctions have been
demonstrated to have resulted from
classical BC efforts to date.
History of BC
• In the 1990’s, the journals,
• “Biological Control - Theory and
Application in Pest Management” and
• “Biocontrol Science and Technology”
were started.
• Additionally, “Entomophaga” (published
earlier) changed its name to “Biocontrol”
in 1997.

Scope & History of BC

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Scope and History

• Period from 1956 to the present.

• Interest developed in ecology and

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