3.4.2. Garlic yield
The effect of NPEOs on the dry weight of garlic cloves was analyzed. Control sample weighted an average of 3.88 g whereas An 600 (μL/L), An 900 (μL/L), Ba 600 (μL/L) and Ba 900 (μL/L) cloves weighted 3.87 g, 3.66 g, 3.75 g and 3.41 g, respectively. No significant differences were found between NPEOs treatments and the control sample. Similar results were observed when garlic yield was calculated. Control treatment had a yield of 7833.39 (±195.81) (kg/ha). There were no significant differences in garlic yield (kg/ha) between control and EOs treatments. These results confirm that there was no phytotoxic effect influenced by An and Ba Eos on plants and garlic production.
3.5. Field study
Differences between the initial and final sclerotia density in each treatment were calculated. Significant differences within the slopes (β1) of the lineal regression of each treatment equation were analyzed (Table 5). The treatment Ip (0.6 μL/L Ip) was no different from the control treatment, showing the highest slopes. This result confirmed that there was no effect of the synthetic fungicide on the production of sclerotia by the fungi. Miñambres et al. (2010) found that Ip had no effect on soil sclerotia density. Similar effects were observed for An (600 and 900 μL/L) and Ba (600 μL/L); no significant differences were found between these samples. According to their slopes, moderate sclerotia inhibition was shown by An and Ba (600 μL/L) when combined with Ip (0.6 μL/L). However, the best sclerotia inhibition was observed in the combinations of An or Ba (900 μL/L) with Ip 0.6 μL/L. These combinations not only showed the lowest slopes of sclerotia production but also confirm the synergistic effect of these EOs with Ip.