cotton thrip

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TOPIC COTTON THRIP

• Submitted to Dr. G.S Gatoria

• Submitted by
• Mr. Gurinderjeet singh
• B.Sc Agri(Integ.) 9th sem
• Roll no. 3810
  

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COTTON THRIPS
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HOST PLANTS Cotton, Tomato , Tobacco plant,
onion and Most field, vegetable, flower, and
orchard crops are attacked by at least one thrip
species. Several trees and weedy plants are
commonly infested also.
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DISTRIBUTION
It is found in united states ,India and some
countries of Africa. In Indian it is commonly
occur in M.P., Maharashtra, Mysore, Chennai,
Gujrat, U.P., Delhi and Punjab etc
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Nature of damage

• Thrips are early season pests of seedling cotton.
  
• They may be a problem under cool, wet conditions
  when plant growth is slowed.
• They may be especially numerous in cotton grown
  near maturing small grain crops.
• Thrips damage cotton leaves and terminal buds.
• Their feeding ruptures cells which cause stunted
  plants and crinkled leaves that curl upward.
• During severe infestations terminal buds may be
  destroyed, causing excessive branching of the
  plants and delaying plant growth.

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LIFE CYCLE

• There are four developmental stages namely egg,
  larva, pupa, and adult.

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EGG- Eggs are usually white, bean-shaped, and
approximately 0.2 mm long.
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LarvaeThe wingless larvae are usually white or
yellow and approximately 0.25 mm long. There are
two larval instars.
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Prepupa and Pupa- Pupal stages resemble larvae
in shape and color. Prepupa have short wing pads
and pupae have long wing pads. Pupae usually
remain motionless unless disturbed.
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Adult Thrips which are pests of cotton are
yellow, brown, or black insects usually less than
2 mm in length. Most adults have two pairs of
narrow wings fringed with long hairs, though some
species lack wings in the winter.
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Control Chemical control such as Imidacloprid
200 SL _at_ 0.5ml/litre , Thiamethoxam 25 WG _at_
11.5gm/lit. of water can be used only when there
is high degree of symptoms, indicative of high
thrips population.

• IMIDACLOPRID

• ENDOSULFAN

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