INFLUENCE OF THE SOYBEAN SEED COAT UPON SEED INFESTATION AND DEVELOPMENT OF THE INSECT CALLOSOBRUCHUS MACULATUS - Soybean and Wheat Crops: Growth, Fertilization, and Yield - page 15

Figure 7. Performance (A) and survival (B) of Callosobruchus maculatus on artificial seeds containing
different concentrations (0, 2, 8 and 16%) of soybean seed coats from commercial, Elite, Conquista,
Tucunaré, UFV Florestal, UFUS 2003 and UFUS 2005 cultivars. Experiments were done in triplicate
and the data shown are the average of these results.
The values of WD 50 (dose that reduced larval weight to 50%) and LD 50 (dose that reduced
the number of surviving larvae to 50%) were calculated to all soybean seed coat flours and
the results are shown in figure 9. The smallest values of WD 50 (Figure 9A) were found for the
seed coat of UFV 20 Florestal (1.5 %), Tucunaré (3.0 %) and soybean commercial seeds
(3.3%). Thus, these seed coats were the most efficient in the reduction of larval mass (Figure
9A). The seed coat flours of UFUS 2005, Conquista, UFUS 2003 and Elite cultivars showed
the highest values of WD 50 (10.5, 11, 11 and 12%, respectively) (Figure 9A); even though,