The capability of Trichoderma (T.) harzianum (T1), T. asperellum (T2) and T. virens (T3) as bio control agents for two pathogens of chickpea roots, Fusarium solani and Fusarium oxysporum were evaluated alone or in combination under field and greenhouse conditions. Chickpea planted in artificial soil infested with pathogens F. solani and F. oxysporum were treated with T1, T2, T3, T1+T2, T1+T3, T2+T3, T1+T2+T3. Our results indicated that the best biocontrol treatment occurred in groups infested with F. solani and treated with T1+T2+T3 (84%), followed by groups exposed to F. oxysporum with the same treatment (83%). The least effective group was roots infested with both Fusarium spp. and treated with T. virens (T3). It is concluded that although all bio control agents that were applied individually reduced disease incidence, synthetic treatments showed a more protective effect as a biocontrol for chickpea fields exposed to F. solani and F. oxysporum under greenhouse condition. Key words: Fusarium solani, Fusarium oxysporum, Trichoderma, biocontrol, chickpea.

Three field experiments were conducted during 2008, 2009 and 2010 seasons at the Experimental Farm, Faculty of Agriculture, Suez Canal University at Ismailia to study the effect of mineral and biofertilization of phosphorus and foliar with potassium on yield, its attributes and seed quality of new sesame variety (Taka 2 cv.) in newly reclaimed sandy soils of Ismailia, Egypt. The experimental design was split plots with five replications. Four levels of mineral and bio phosphorus fertilizer (57, 76, 95 and 76 kg P2O5/ha plus Phosphorin biofertilizer containing phosphate dissolving bacteria) were arranged randomly in the main plots and three concentrations of potassium sulphate as foliar spraying namely water (control), 1% and 2% were distributed at random in the sub plots. Increasing phosphorus fertilizer rate up to 95 kg P2O5/ha significantly increased plant height, fruiting zone length, number of branches and capsules/plant, 1000-seed weight, seed yield/plant, seed oil content (%) and seed and oil yields/ha of sesame. Appling biofertilizer (Phosphorin) plus 76 kg P2O5/ha exceeded significantly all mineral phosphorus levels (57, 76 and 95 kg P2O5/ha) in the aforementioned characters except number of branches/plant. Increasing potassium concentration as foliar spraying up to 2% induced significant increases in all the studied characters. Key words: Biofertilization, phosphorus, potassium, sesame, yield, yield attributes.

The powders of the roots of S. longepedunculata with the roots of Zanthoxylum xanthoxyloides acting as reference product at two concentrations (1 and 5% wt/wt) were screened in the laboratory against S. zeamais and C. maculatus. The root powder of S. longepedunculata proved effective at 1 and 5% against S. zeamais and C. maculatus due to the presence 2-hydroxy-benzoic acid methyl ester (methyl salicylate, I) which is responsible of their biocide effect against the stored grain insects. Methanol extracts of root powders of S. longepedunculata and Z. xanthoxyloides were effective at 0.0, 0.04, 0.06 0.08 and 0.1 g/ml, significantly reducing