كفاءة بعض العوامل الأحيائية و الكيميائية في مكافحة ديدان تعقد الجذور Meloidogyne spp على الباذنجان

Abstract EN

The study was conducted in aplastic house naturally infested with root knot nematodes (RKN), Meloidogyne spp at Al-Saqlawya 60 KM to the west of Baghdad, during spring 2012.

to evaluate the efficacy of biocont-T ( Trichoderma harzianum), Paecilomyces lilacinus, fytomax-N(Neem), and the chemical pesticide rugby against (RKN) on eggplants Solanum melongena L..

The biocont at 19×107 spores/g and P.lilacinus at 1010 spores/g were added at 100 g/replicate (12 plants), Rugby 10% was mixed with the soil at 15 g/replicate, Fytomax-N was added around the roots at 2.5 ml/L and repeated every 20 days.

The growth parameters, foliage and root length, fresh and dry weights for both root and foliage/plant, were estimated after 3 months eggs and juvenile numbers were also calculated.

Results showed that all control agents have increased significantly root lengths compared with control, whereas no effect of control agents on foliage length was observed.

no effects on fresh and dry weights root by the control agent were observed accept that rugby induced significant reduction in fresh and dry weights of root.

Biocont caused significant increased in fresh and dry weights of foliage whereas no effects of the other control agents on these factors were observed.

It has been observed that P.lilacinus was the more efficient in reducing disease severity and root knot index (27.60%, 2.76), eggs number (11841 egg/ 5g root), juvenile 2 numbers (105 juvenile/100 g soil), followed by biocont and rugby compared with disease severity 92.40%, root knot index 9.28, eggs number (167980 eggs/5 g root) and juvenile 2 numbers (1485 juvenile/100 g soil) in control.

We concluded that root knot nematode, represent a serious problem on eggplants and the possibility of using biological agents to manage this problem.

We recommend the addition of bio to the soil before cultivation.