is capable of producing approximately 106kg of sugar and 46kg of molasses. A typical molasses to ethanol conversion rate is 4kg of molasses/L ethanol (Lavarack, 2001). However, this rate can vary based on production practices and sugar content of the molasses (Nguyen et al., 2009 andSilalertruksa &Gheewala, 2010).Molasses composition is usually influenced by the variety and maturity of the cane and beet, soil, climate and the processing conditions in the factory (El-Gendy et al., 2013). High yielding and efficient fermentation of molasses with varying composition requires selection of special yeast strains having high tolerances to inhibitory conditions as well as ability of fast fermentation. Other natural requirements like tolerance to high alcohol, sugar and temperature are also necessary (Bazmi et al., 2007

Microbial control is one possible option to reduce cockroaches' populations. On searching for microbial control of cockroaches, a laboratory study was carried out to investigate the effect of spore suspension and metabolites of both fungi Trichoderma harzianum and Fusarium solani against cockroaches; Periplaneta americana. In this study we determined the pathogenicity of both spore suspension and metabolites of both fungi. Spore suspension was applied to the roaches either as a food additive or as a spray. Although both fungi have insecticidal effect on the cockroaches but F. solani fungi revealed higher mortality rate than T. harzianum. Both application techniques were effective but spraying showed relatively high mortality rate than incorporation of spores as a food additive. Comparing fungal metabolites with the fungal spores, fungal metabolites for both fungi were more effective than the fungal spores. Insecticidal effect of both agents and their metabolites were discussed.

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