اﺳﺘﺤﺜﺎث اﻟﻤﻘﺎوﻣﺔ اﻟﺠﮭﺎزﯾﺔ ﻓﻲ اﻟﻄﻤﺎطﺔ Solanum lycopersicum L ﻟﺪﯾﺪان ﺗﻌﻘﺪ اﻟﺠﺬور ﺑﺄﺳﺘﺨﺪام اﻟﺒﺎﯾﻮن Benzothiadiazole

This study was conducted to evaluate the efficiency of Benzol thaidazole-7carbothioic acid-S-methyl ester(BTH or Bion) to induce systemic resistance in tomato,Solanum lycopersicumL. to root knot nematodes, Meloidogynespp in tomato plants 30d after treatments. Results showed that Bion was efficient in inducing systemic resistance to root knot nematodes in tomato plants. Foliagespraying or soil drenching at 50 mgL-1were superior overtheother test concentrations and seed soaking treatments. At this concentration gall indexwas 2.11 compared with 5 in control. Root fresh weight and root dry weighwere 6.25 and 0.62, 8.40 and 0.70g for treated and control plants respectively. Shoot fresh weightand dry weightrecorded 23.60, 2.29,17.42 and 1.42g for treated and control plants respectively. The number of second stage juveniles penetrating the roots was51.33 and 114.88 in treated and control plants respectively. Application ofBion atthis concentration also reduced gall index to2.88 compared with 5 in control. At 50mgL-1 ofBionroot fresh and dry weight was4.68, 0.44 and 21.40,2.52g compared with 8.58, 0.69,and 26.21,4.45g in control plants respectively. At this treatment also a significantly lessjuveniles, 75.55enteredthe roots of treated plantscomparedwith116.66juvenilesincontrol.