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Reappraisal and refinement of SIRATAC sampling procedures for insect pests of cotton, particularly Heliothis

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Teks penuh

(1)

•,

' .

(

S~AATAL

END OF SEASON

REPORT

89/90

(2)

'

250

- E 200

E 150

-

100

50

GWYDIR Sprays - Area Basis 1989/90

Endosulfan 32.8%

Endo and Dime or Ometh 10.2%

c.tbamates 3.0%

Average number of sprays par ha = 7.5 Slratac ha= 14962

Dime or Omath 21 .1%

Profanofos 0.4%

Pyre and Others 3.4%

MOREE Rainfall & Day Degrees

OCT

1989

NOV

... e ...

e ····.... ···

DEC JAN 1990

IZJ Ralnfall 89/90 0 Day Degrees 89/90 0 Day Degrees Mean

FEB MAR APR

600

500

400 ... "' C1) G>

C>

300 C1)

c

>

200 c ca

100

0

(3)

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2

Total Eggs Total Larvae

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I\

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89/90 GWYDIR

HELIOTHIS PRESSURE Medium + Large Larvae

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