كفاءة بعض الفطور و البكتريا في المكافحة الإحيائية لنيماتودا تعقد الجذور Meloidogyne javanica على الطماطم-البندورة

Abstract EN

The efficiency of four isolates of Acremonium butyri (Beyma) Gams, three isolates of Paecilomyces lilacinus (Thom) Samson were evaluated as biocontrol agents against the root-knot nematode, Meloidogyne javanica (Treub) Chitwood.

Results showed that all the isolates tested were capable of reducing gall number on the root system, especially isolates 1 and 4 of P.

lilacinus and A.

butyric, respectively.

Five inoculum densities (0, 2, 4, 8 and 16 g/plant) of A.

butyri and P.

lilacinus grown on wheat seeds were used.

Results indicated that an inoculum density of 8 g/plant, resulted in efficient biological control, especially 7 and 14 days before transplanting.

The efficiency of the fungal species P.

lilacinus, P.

lilacinus biotype C, A.

butyri and the bacterium Pasteuria penetrans (Thorne) Sayre and Starr as biocontrol agents compared with nemacur (40%) for control of M.

javanica on tomato cv.

Pearson under plastic house conditions was investigated.

Results indicated that all the biocontrol agents significantly reduced the number of eggs and juveniles in the roots and the number of juveniles in the soil.

These agents also significantly increased the yield compared to the nemacur treatment.