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ŠUMARSKI LIST 1-2/2013 str. 57 <-- 57 --> PDF

The development of the 4^th instar of caterpillars of future females was fastest in treatment T1, but differences were statistically not significant (T0/15, T1/12, T2 and T3/14 days). The 5^th instar in treatments T1 and T2 responded in the same way (11 days). The development was prolonged in treatments T0 (15 days) and T3 (17 days). Statistically significant differences occurred between treatments T1 and T3 as well as T2 and T3 (p = 0.018). The 6^th instar was shortest in treatment T1 (20 days), which differed significantly (p = 0.001) from control treatment (24 days) (Fig. 6). The duration of a pupa was independent on the food quality ingested by caterpillars (Figs. 5, 6) both in males and females.
The total duration of development from hatching a caterpillar to a new moth was at males and females shortest in treatment T1 (males 88, females 94 days) followed by treatment T2 (males 90, females 100 days), T3 (males 98, females 109 days) and T0 (males 118, females 112 days). Differences between particular treatments were statistically significant except T1 and T2 at males; T1 and T2, T0 and T3 at females (Figs. 7, 8).
The weight of pupae – Težina kukuljice
The weight of female pupae (0.61 g) regardless of the food quality of caterpillars was significantly higher (p < 0.001) than the weight of male pupae (0.25 g) (Fig. 9). At males, effects of the food quality on the weight of pupae were not proved (T0/0.20 g, T1/0.29 g, T2/0.26 g, T3/0.21 g) because of the small number of males in treatment T0, which caused the large dispersion of values (Fig. 9). At females, treatment T0 (0.45 g) significantly (p < 0.001) differed from other treatments T1–T3 (0.72–0.74–0.67 g) (Fig. 9).
Food consumption – Potrošnja hrane
The total consumption of food of caterpillars of the 1^st–3^rd instars was highest in treatment T0 (0.06 g), which significantly (p < 0.001) differed from treatments T1–T3 (0.05–0.04–0.04 g) (Fig. 10).