Studies indicat that; 1. when soil moisture is above 15% and soil temperature is 20-28℃ ,the condition is benefic for infecting and reproducing of the nematodes. At the same time,this condition is samely needed for t...Studies indicat that; 1. when soil moisture is above 15% and soil temperature is 20-28℃ ,the condition is benefic for infecting and reproducing of the nematodes. At the same time,this condition is samely needed for the white grubs; 2. the migration ability of the nematodes is lower in soil of field than that in tested soil of the laboratory. But in general,the nematodes appplyed into soil distribute mainly in the ploughed layer and a migration area for them can be formed in the direction of horizontal; 3. observations reveal that invasion time of the S. glaseri NC34 into larval (H. parallela) through intersegmental membrane of body segment and foot after the inoculation is 30 min,and it for invading cuticle of larvae body side is 120 min. But the infection time is different in the different individuals of S. glaseri and in the different species of grubs.展开更多
文摘Studies indicat that; 1. when soil moisture is above 15% and soil temperature is 20-28℃ ,the condition is benefic for infecting and reproducing of the nematodes. At the same time,this condition is samely needed for the white grubs; 2. the migration ability of the nematodes is lower in soil of field than that in tested soil of the laboratory. But in general,the nematodes appplyed into soil distribute mainly in the ploughed layer and a migration area for them can be formed in the direction of horizontal; 3. observations reveal that invasion time of the S. glaseri NC34 into larval (H. parallela) through intersegmental membrane of body segment and foot after the inoculation is 30 min,and it for invading cuticle of larvae body side is 120 min. But the infection time is different in the different individuals of S. glaseri and in the different species of grubs.
