2^. 



appeared'to°bf o7 "^"^^^"\^ ^^e water content of the soil 

 eelwom^ A^ f T''"'' ^P^^^ance for the activity of stem 

 eeiwoms. At moisture contents below field caoacitv th-i=> 

 activity tends to be" low (SEINhURST 19i,0). "^^^^^^^^ ^^^ 



in moift'clff^o?f' ^'^^°^ 1'^ ^^^'"^^^ °^ '^-- --^-oms 



It is always high in soils which have been oartlv 

 3terilxzed by heat (even 50° for 30 minutes is eJ^^Jive) 



Ttl"' Moit^^^roh'^l^''^"^;^''^' '"^^^"^^ ^^^-i^- -d "li- 

 dJre^tlv bv Zt,'' P°P"l^ti°" "^'bers are influenced in- 

 airectly by this temporary inactivity. The inactivating 

 factors do not kill the nematodes however. Sey blco^ 

 trelllTi: T" ' ^°'' "^'^ ^^^^-^ ^t- nematodes is 

 silt .St\\| r^'"'''"' "^^^"^ ^^'°^'^^ °^ ^^^^^^^^« 



