الإدارة المتكاملة لديدان تعقد الجذور Meloidogyne spp. على محصول البندورة-الطماطم تحت ظروف البيت البلاستيك

الملخص EN

This study was carried out to evaluate the role of some nematicides, botanical formulations and the bio-control fungus Paecilomyces lilacinus in the management of root knot nematode (RKN) Meloidogyne spp.

on two tomato varieties, individually and collectively, on compatibility basis within an integrated program to manage this pest.

Result showed the high efficacy of nematicides, botanical formulations and biocontrol fungus P.

lilacinus in reducing RKN disease severity and improving tomato growth characteristics.

Integrated treatment of Tervigo+ Nematron+Nemadaed+P.

lilacinus (T+NT+Pl+ND) was superior in achieving highest reduction in root knot index and nematode population density in 100 g of soil which reached 0.28 and 61.56 compared with 2.00 and 861.69 for the infested control, respectively, whereas the lowest values of 1.33 and 260.83 were reached for the bio-control agent P.

lilacinus, respectively.

Highest means of wet and dry weight of vegetative growth, yield and chlorophyll content was observed for the integrated treatment (T+NT+Pl+ND) that reached 174.78, 453.37, 2121.90 g and 26.32 SU, respectively, whereas the lowest means of the same traits were observed for the Nemadead and Oncol 5% G treatments.

Shouroug tomato variety had the longest root length of 35.70 cm.

Lowest mean of root fresh and dry weight were achieved by the integrated treatment (T+NT+Pl+ND) and reached 21.01 and 6.63 g compared with 27.05 and 9.08 for the infested control, respectively.

The results showed that all the treatments stimulated systemic resistance in the tomato plant and the integrated treatment (T+NT+Pl+ND) was significantly superior to other treatments in stimulating peroxidase enzyme activity (13.96 unit/ml), contrary to Oncol 5% G treatment with least stimulation to enzyme activity (10.80 units/ml).