Pests of Chillies
dorsalis Hood & Thrips tabaci Lind
Family: - Thripidae
Order: - Thysanoptera
one of the important spices crop cultivated practically all over the
State. This crop is infested by pests like thrips, aphids, mites,
cutworms, root grubs etc. of these, thrips is regarded as the most
adults are minute delicate insects, less than 1mm long and are light
yellow in colour. Their wings are fringed with hairs. The younger stages
are still more minute but wingless.
a polyphagous species recorded on cotton mango, tondli, bottle gourd,
guava, bhendi, brinjal, onion etc.
lays fertilized or unfertilized eggs inside the leaf tissues, generally on
the lower side of the leaf. A female can lay 40 to 60 eggs at the rate of
4-6 days. Ramchndran (1950) reported average incubation, larval, pre-pupal
and pupal periods to be 8 to 9.4 to 6,2 and 3 days respectively. Prepupal
and pupal stages are generally found in soil at a depth of 2.5 to 5cm. The
pest is more active during later part of monsoon season especially during
a dry spell.
pest can be effectively controlled by spraying with 0.05% endosulfan,
0.03% dimethoate, 0.02% phosphamidon or 0.05% monocrotophos. Addition of
sulphur in chlorinated hydrocarbon insecticides in equal proportion would
control mites also.
are tiny yellowish soft-bodied insects, the adult is along 1mm long and
has two projections called cornicles on the dorsal side of abdomen.
are found in large colonies on underside o leaves and tender shoots. The
nymphs and adults suck the sap. Therefore, the affected leaves turn
yellow, get wrinkled and destorted. The insect also exude honeydew on
which fungus develops, rapidly covers the plant with sooty mould that
interferes with the photosynthetic activity of the plant. As a result, the
growth of plant is stunted and yield is affected adversely. Besides, they
act as a vector for transmitting by aphids. The loss caused on this
account is far more severe than by their feeding and devitalising the
and apterous forms reproduce parthenogenitically. Single female produces
8-22 nymphs/day. The nymphs are completed in 7 to 9 days and several
generations are completed in a season.
a polyphagous species have been recorded on cabbage, brinjal, radish,
chilly, tomato, tobacco, sanhemp, sweet potato etc.
with 0.05% endosulfan, 0.02% phosphamidon, 0.03% dimethoate, methyl
demeton or thiometon control the pest effectively.
are not insects as they have four pair of legs and belong to the class –
Arachnida. They are extremely minute with variable colour.
suck the cell sap from leaves. Badly attacked leaves show a peculiar
bronzy and shiny appearance, ultimately wither and dry up.
cotton, cluster bean, brinjal, bhendi etc.
Spray 0.2% sulphur or 0.03% dicofol (2) Sulphur dusting at the rate of
20-25 kg/ha also gives satisfactory control of the pest.