5.Integrated Pest Management - DR. H.B. MAHESHA · 2018. 10. 4. · or "Integrated Pest Management...
Transcript of 5.Integrated Pest Management - DR. H.B. MAHESHA · 2018. 10. 4. · or "Integrated Pest Management...
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INTEGRATEDINTEGRATEDINTEGRATEDINTEGRATED
PESTPESTPESTPEST
MANAGEMENTMANAGEMENTMANAGEMENTMANAGEMENT
Dr. Mahesha H BAssociate Professor and Head
Department of Sericulture
Yuvaraja’s College
University of Mysore, Mysuru, India
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Integrated Pest Management (IPM) is an
‘ecosystem-based strategy that focuses on long-term prevention of pests or their damage through a combination of techniques such as combination of techniques such as physical, chemical, biological, habitat manipulation, modification of cultural practices, and use of resistant varieties’
or
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or
"Integrated Pest Management
(IPM) is a sustainable approach to
managing pests by combining
biological, cultural, physical andbiological, cultural, physical and
chemical tools in a way that
minimizes economic, health and
environmental risks"
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1. Physical Method
2. Chemical Control
3. Use of Resistant Varieties
4. Genetical / Autocidal4. Genetical / Autocidal
5. Biological Methods
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Physical control
(a) Mechanical
(b) Phototropical(b) Phototropical
(c) Cultural
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(a) Mechanical:
i. Hand and net collection of egg masses, larvae,
pupae, scrapping of the bark etc.
ii. The other forms of mechanical destruction ii. The other forms of mechanical destruction
through the cutting of the infested shoots and
branches and their destruction, preferably by
burning.
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(b) Phototropical: Another method of physical
control may be through light
trapping, taking advantage
of the phototrophic nature of
certain insects. This has
been found to be particularly been found to be particularly
effective against the
Lepidopteran pests forming
one of the largest groups of
phytophagous insects.
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(c) Cultural:i. Turning up of the soil, flooding etc., which
expose the pests to physical stress. During the
process they are killed by exposure to sunlight,
water and the predators.
ii. Pruning of the plants and burning of the infested
twigs may also lead to the control of certain
Pruning of the plants and burning of the infested
twigs may also lead to the control of certain
foliar pests.
All the physical control methods are pollution free
but labour intensive.
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Chemical Control They are, no doubt, very quick in action but
are cause pollution of the environment and danger to non-target group of insects likemany useful insects thereby breaking the agro-eco-system. agro-eco-system.
Dangerous to silkworms also.
They may affect higher animals also.
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Use of Resistant Varieties One way to avoid the pest infestation is the
selection of pest resistant varieties. OR
Cheapest method
Criteria for screening of pest resistant varieties:
(a) Visual damage rating. (a) Visual damage rating.
(b) Determination of the number of plants
surviving infestation at regular intervals.
(c) Comparison of yield loss between the infested
and the non-infested plants.
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Genetical / Autocidal:Pests are controlled by the introduction of sterile
or genetically altered individuals into the wild
population.
"a method of pest control using area-wide inundative release (involves releasing large inundative release (involves releasing large
numbers of natural enemies for immediate
reduction of a damaging or near-damaging pest
population) of sterile insects to reduce reproduction in a field population of the same species".
It is therefore a type of “birth control”
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Legislative (Quarantine):Legislative or regulatory method is a method
mainly employed to prevent the introduction of pests from other countries or to prevent the spread of a pest from one area to another. The method is operated through specific regulations known as plant-quarantine laws.
In India some states have special pest acts, by which it becomes obligatory on the part of the cultivators and governmental authorities to take appropriate steps to control a particular pest when it appears in an epidemic form.
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Biological control (a) Use of hyperparasitoids to attack the primary
parasitoid.
(b) Use of attractants and repellants including pheromones to trap and kill the insects.
(c) Use of hormones and other physiology impairing chemicals to upset the normal
(c) Use of hormones and other physiology impairing chemicals to upset the normal metabolism.
(d) Use of sterile male technique.
(e) Use of bacterial and fungal insecticides is ruled out as many of them are known to be toxic to the silkworm itself.
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BIOLOGICAL CONTROL OF MULBERRY PESTS
Practically every crops pest has its natural enemies in the form of parasites, predators and disease causing organisms.
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� The biological control involves a large scale multiplication of and liberation of such agents, or creating conditions under which the naturally occurring agents can act effectively.occurring agents can act effectively.
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The following mulberry pests
can be controlled effectively
under this method.under this method.
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Bihar hairy caterpillar, Spilosoma obliqua Walker
(= Diacrisia obliqua)
Trichogramma chilonis is an egg parasitoid of
many lepidopteran pests. It is widely used as
biocontrol agent of several crop plants.
Release twice T. chilonis at the rate of 5 tricho-
cards (20,000 parasitised eggs in each tricho -
card) per acre, at an interval of 3 days.
Parasitoid releases have to be undertaken 20
days after pruning or harvesting.
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Trichogramma parasitized on egg
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Leaf-roller, Margaronia pulverulentalis
This pest can be biologically controlled with the
help of its natural enemies like Apanteles spp.
and Diadegma spp.
Also, Trichogramma chilonis can also be used to Also, Trichogramma chilonis can also be used to
control this pest as described for Bihar hairy
caterpillar.
Tetrastichus howardii, is an pupal parasitoid can
be used at the rate of 1 lakh adults/acre.
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Two alternate examples are given below to know the
mechanism of controlling the pests.
Larvae of Apanteles sp. (parasitoid) emerging from Pieris sp.
Larva Parasite Diadegma insularisovipositing on Diamondback Moth larva.
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Mealy bug: MaconelIicoccus hirsutus
Successful biological control of mealy bug can be
achieved by employing predatory cociinellid
Ladybird beetle like Cryptolaemus montrouzieriat the rate of 125 adults per acre twice, during
August-September and October-November. August-September and October-November.
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Alternatively, 500 adults of Scymnus coccivora per acre
are also useful.
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Cryptolaemus montrouzieri feeds on MaconelIicoccus hirsutus
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Thrips: Pseudodendrothrips mori
This pest can be biologically controlled by
Ladybird beetles, Menochilus sexmaculatusand Scymnus coccivora were observed to
feed on thrips in the field and laboratory. feed on thrips in the field and laboratory.
Termites:
The use of entomopathogenic fungi and plant
extracts for termite control is currently
being investigated.
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Acknowledgementsto
INTERNETINTERNET
FOR
PICTURES AND PHOTOGRAPHS
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