MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
NIRANGA
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUGR.R.D.T.
MEALY
BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY
Department of Horticulture & Landscape Gardening
Faculty of Agriculture & Plantation mgt Wayamba
BUG MEALY
BUG
MEALY BUG MEALY BUG
University of Sri Lanka
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG MEALY BUG
Scientific classification
Kingdom :
Animalia
Phylum
:
Arthropoda
Class
:
Insecta
Order
:
Homoptera
Suborder :
Sternorrhyncha
Family
Pseudococcidae
:
Morphological Features
- Mealy bugs are sexually dimorphic
- Females
- are nymphal
- exhibit reduced morphology
- and are wingless
- Males
- Are winged
- do change completely during their lives
- exhibit a radical change during their life cycle
- changing from wingless, ovoid nymphs to "wasp-like" flying
adults.
- Mealy bug females feed on plant sap
- They attach themselves to the plant and secrete a powdery wax
layer used for protection
- The males are short-lived
Ovulation
- Some species of mealy bug lay their eggs in the same waxy
layer
- Other species are born directly from the female.
Vine mealy bug adult
female with egg mass.
Species include
Pseudococcus viburni
-
Obscure mealy bug
Paracoccus marginatus
-
Papaya Mealy bug
Planococcus citri
-
Citrus mealy bug
Maconellicoccus hirsutus
-
pink hibiscus mealy bug
grape mealy bug
60 crops that can be affected by mealy bug (Pseudococcidae
family) have been identified.
More than 200 species of mealy bug have been identified in
Sri Lanka
(Source Hayleys Agro official web site)
Papaya Mealy bug (Paracoccus marginatus)
- Serious pest of many tropical and sub tropical fruits, vegetables,
and ornamental plants
- The first discovery of P. marginatus in the United States was in
Florida in 1998
- Native to Mexico and Central America
- In 2008, first observed in the Western Province
- It causes severe economic losses, health problems and habitat
destruction in many tropical and sub tropical plants
Dispersion
Anuradhapura
Kegalle
Polonnaruwa
Gampaha
Ratnapura
Colombo
Galle
Matara
Severely affected plant species
Carica papaya
Hibiscus spp.
Plumeria spp.
Acacia spp.
Annona squamosa
Ipomoea spp.
Manihot spp.
Mimosa pigra
Persea americana
Solanum melongena
Acalypha spp
Orchid spp.
Severely affected plant species cont.
Breadfruit
Jack
Manioc
Mango
Chillies
Brinjals
Citrus
Pineapple
Damage
The mealy bug injects a toxin as it feeds on leaves and fruit
which results
- chlorosis (yellowing)
- stunting, deformation
- early leaf and fruit drop
- buildup of honeydew
- Sooty mold growing on honeydew excreted by the
mealy bugs interferes with photosynthesis
- Heavy mealy bug infestations may kill plants
Life cycle of Papaya mealy bug
♀
Egg
2-3 days
4 -7 days
10-14 days
Adult
1st instar
♀ 8-10
days
Common for
Both ♂ and ♀
4th
2-3 days
2nd instar
instar
♂
1-2 days
3rd instar
Attention
Safe solution for controlling
- Mechanical and synthetic chemical control is not compatible
- Difficult to find out local biological control agents
- Need to find out more quick and safe solution
Biological Control
- The tiny parasitic wasps
Anagyrus loecki
Pseudleptomastix mexicana
Acerophagus papayae
- lady beetles
- lacewings
- provide excellent biological control of the papaya mealy bug
- Acerophagus papayae was decided to introduce to Sri Lanka
Government exported 50000 sample of Acerophagus
papayae from USA
Taxonomy
• Kingdom
: Animalia
• Phylum
: Arthropoda
• Class
: Insecta
• Order
: Hymenoptera
• Family
: Chalcidoidea
• Genus
: Acerophagus
• Scientific name
: Acerophagus papayae
- Parasitoid that feeds only on the Papaya Mealy bug
- Belongs to the Bee family
- Each female has an egg sac that contains 500-600 eggs
- Lays only about 100 to 200 eggs in each pest, and has
the ability to infest many
- Other countries noted a 99% reduction of the Papaya
Mealy bug just three months after introducing the
parasitoid.