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بسم الله الرحمن الرحيم.

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Cotton nematodes
)Cotton Nematodes

  • . . /


Cotton nematodes1
)Cotton Nematodes

  • , , , .


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  • , , , .. , .


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  • :-

  • Helicotylenchus SPP. , Hoplolaimus SPP . , Meliodogyne SPP , Pratylenchus SPP . Trichodorus SPP , Tylenchorhynchus SPP, Rotylenchulus reniformis .

  • .


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() 15-35 . .



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  • (0.4 -4) (20-250) . . . .



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.

.

:

. .........


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,


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  • ( 1) Root knot

  • Root knot nematodes ( Meloidogyne spp.)

  • .



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  • 25% .


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:- .

  • 25-27 9 40 .


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  • .

  • 2500 .

  • 70 M. arenaria , M. hapla , M. javanica , M. incognita .


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  • .

  • M. hapla M.javanica ,M. incognita - .

  • . .


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. :-

1- :-

  • .

  • .

  • , ( ) , .


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  • giant cells , .

  • , .


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2 - :-

  • , .

  • 25%.


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  • :- () .


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  • Sausage-shaped .


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  • ( ) ( 500 ) 15 40 7-10 .


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  • 4 .


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4 .


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4 . Meloidogynespp.


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( 4 .2) Lesion nematode

Pratylenchus spp.

.

.


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  • 4 .

  • Pratylenchus 166 P.penetrans,P.brachyurus,P.coffeae,P.vulnus,P.zeae


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4 .

- P.coffeae P.penetrans, P.vulnus .


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Lesion 4 .


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  • 4 .

  • .


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4 . ( ) Pratylenchusvulnus.( )


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  • . .


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  • .

  • secondary organisms necrotic hyperplasia .


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.

3 ( ) .

40 .


3 stubby roots
3- . Stubby - roots

  • Trichodorus spp. ..

  • .

  • .


4 stunt plants
4 - .Stunt plants

  • Tylenchorhynchus spp. .

  • .

  • .


5 reniform nematode rotylenchulus reniformis
5- . Reniform nematode)Rotylenchulus reniformis )

  • .


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  • .

  • 30-60% .


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  • .

  • .


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  • .

  • .


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  • .

  • 65 Rotylenchulus

  • Rotylenchulus reniformis .


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  • .

  • Fusarium wilt .


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  • .

  • 3 25 ( ) .


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:-

  • 1- .

  • 2- .

  • 3- .

  • 4- 2-3 . .



Solarization laying clear plastic
Solarization- Laying Clear Plastic


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  • .



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