important insects pest of pineapple

1. SUBJECT- INSECTS PESTS OF PINEAPPLE
SUBMITTED BY:-
BIJAY KUMAR BAIDYA 20HO/12

2. 1. BORER
• Rhinoceros beetle - Oryctes rhinoceros Linn. (Family-
Scarabaeidae Order-Coleoptera)
NATURE OF DAMAGE
The adult beetles bores into the stem causing wilting of plants.
MANAGEMENT
Remove and destroy damaged plants.
Collect and destroy various bio-stages from manure pits.
Mix entomogenous fungal culture of Metarhizium anisopliae in the manure
pits during cooler months to attack grubs.
Encourage Reduviid bugs, Platymeris laevicollis to attack adults.
Hook out and kill adults from the base of stems.
Set up light traps following first rains in summer and monsoon period to
attract adults.
Soak castor cake at 1 kg in 5 1 of water in small mud pots and keep them in
the pineapple garden to attract the adults.
Use Rhinolure vane trap for attracting adults.

3. MARK OF IDENTIFICATION
 Egg: Oval creamy white egg in manure pits or decaying
vegetable matter at a depth of 5 to 15 cm. Egg periods is
8 to 18 days. Female laid 140 to 150 eggs.
 Grub: Grub is stout, sluggish, white “C”-shaped with
pale brown head and found at a depth of 5 to 30 cm.
 Pupa: Grub pupates in earthen cells at a depth of 0.3 to
1m.
 Adult: Adult beetle is stout, brownish black or black
and has a long horn projecting dorsally from the head
in male. Horn is short in female.
Fig- Rhinoceros beetle
Fig- Rhinoceros Grub

4. 2. SAP FEEDERS
1. Thrips - Thrips tabaci Lind. (Family-Thripidae
Order- Thysanoptera)
NATURE OF DAMAGE
The nymphs and adults which shelter between the leaf sheaths and stems
lacerate the epidermis and suck the exuding sap.
The affected leaves exhibit silvery which blotches leading to distortion,
wilting and drying from tip down wards.
The seedlings show retarded growth.
The bulbs remain undersized and appear distorted in shape
MARK OF IDENTIFICATION
It reproduces parthenogenetically.
The adult female inserts the eggs into the tender leaves.
The egg period is 10-15 days.
The nymphs and adults are yellow in colour.
The nymphal period is 4-6 days.
It pupates in soil. The pupal period is 3 days.
The pest undergoes 10 generation per year.

5. MANAGEMENT
Use neem coated urea which reduce the infestation of pest.
Set up sky-blue colour sticky traps which attract more adults than
yellow colour traps.
Spray methyl demeton or dimethoate at 1 ml/litre or monocrotophos 1
ml/litre with teepol 0.5 ml/litre of water.
Grow resistant varieties viz., White Persian, Grano, Sweet Spanish,
and Crystal wax.

6. 2. Mealybug -Dysmicoccus brevipes Cockerell.
(Family- Pseudococcidae Order-Hemiptera)
NATURE OF DAMAGE
Both nymphs and adults desap the leaves and fruits result yellowing of
leaves and shriveling of fruits.
MAK OF IDENTIFICATION
 Live in colonies underground with only a small proportion living on the leaves.
 Occurrence of mealy bug wilt is largely correlated with the subterranean colony
on the roots.
 Arial individuals are to be found mostly at the base of the leaves
Fig- Mealy bug

8. MANAGEMENT
Cultivate resistant varieties like Red Spanish and
Queen.
Collect planning material from unaffected
plantations.
Remove basal brownish leaves of cured planting
materials at the time of planting.
Dip basal portion of planting material in methyl
parathion 0.2% solution as a prophylactic measure.
Apply phorate 10 G at 17.5 kg/ha at 100-125 days
interval in the affected plantations.

9. 3. Slug caterpillar - Parasa lepida (Family-
Cochlididae Order - Lepidoptera)
NATURE OF DAMAGE
Larva feeds on leaves voraceously leaving only the midrib and veins results
in severe defoliation
MARK OF IDENTIFICATION
• Egg: Flat shiny eggs on the under surface of leaves
• Larva: Greenish body with white lines and four rows of spiny scoli tipped
red or black, which cause irritation and pain.
• Pupa: It pupates in a compact elliptical chocolate brown shell like cocoon,
which is convex above and flat ventrally as stems. Cocoons are covered with
irritating spines and hairs
• Adult: Adult moth has green wings with prominent dark patch at the base of
each forewing.

10. MANAGEMENT
Eggs are laid in groups and covered with hairs on the leaves.
Egg period is 4-5 days. Larva is stout, slug like ventrally flat,
greenish body with white lines and four rows of spiny scoli
tipped red or black. Larval period is 40-45 days.
It pupates in plant as cocoons covered with irritating spines
and hairs.
Adult moth is green with brown band at the base of each fore
wings.