The main objective of this study was to highlight the fertilizing capacity of the extract of ovine compost (prepared to the simple infusion) in gardening nursery, while specifying the appropriate ratios of extraction and dilution ,for soilless plant fertigation intended for two strategic summer crops in Tunisia: seasonal tomato and seasonal pepper. It is clear that such extraction ratio of 1: 5 is effective for plants fertigation of two considered species. In addition, it has been shown that 200 times dilution of the concentrated extract is beneficial for the growth of tomato plants. However, this organic liquid fertilizer with different dilutions applied and in the experimental conditions adopted, wasn't moderately efficient in stimulating the growth of pepper plants. The importance of this type of compost produced from sheep biomass, widely available in Tunisia, encourage the diversification of its exploitation, which is the object of this preliminary work, deserving more future investigations.

Biology of the sorghum midge, Contarinia sorghicolà (Coquillett), necessitates testing of sorghum, Sorghum bicolor (L.) Moench, cultivars in field plots in multiple locations and/or years to identify resistant genotypes. Using converted exotic sorghum cultivars, this study was conducted to compare visual damage scores across locations and years vs. indirect resistance measurements (percentage yield loss and number of midge per panicle) in a single location and year with two planting dates. Visual damage ratings were made at physiological maturity on the percentage of blasted kernels per panicle in replicated, randomized‐complete‐block field experiments at three locations in 1983 through 1985. In 1985, indirect measurements and visual damage ratings were made at one location. A significant positive relationship was found between visual midge damage rating and percentage yield loss (r = 0.347), and between visual midge damage rating and midge number (r = 0.220). Percentage yield loss did not increase the reliability of identification of resistant cultivars. Cultivars identified with resistance by both methods were IS8232C, IS8237C, IS8112C, IS2740C, IS3390C, IS7132C, IS2685C, IS957C, IS7193C, IS2144C, and IS12572C. The correlation between percentage yield loss and midge number (r = 0.090) was nonsignificant. Both methods depend on high midge density to differentiate resistant and susceptible genotypes. When midge were not abundant good differentiation was not obtained. Indirect resistance measurements were more time consuming than a single visual rating at maturity, and when multiple years or locations were required, the visual damage rating was a more effective method of germplasm evaluation.