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 12

Figure 5. Development of Callosobruchus maculatus larvae on natural soybean seeds from the first day
of oviposition to the fortieth day of development. A - Egg at the first day (commercial soybeans); B -
Egg at the second day (commercial soybeans); C - Egg at the fourth day (commercial soybeans); D -
Egg at the sixth day (commercial soybeans); E - Egg at the eighth day (commercial soybeans); F: Egg
at the tenth day (cv. UFUS 2003); G - Hole across the seed coat of cv. UFUS 2005 (twelfth day); H -
Larva penetrating the cv. Elite (twelfth day); I - Holed egg at the twelfth day (cv. Conquista); J - Larva
at the twelfth day (cv. Elite). K - Dead larva at the fortieth day (cv. UFUS 2005); L - Dead larva inside
the cotyledon at the fortieth day (cv. Conquista). Bars = 0.5 mm. The bar inside panel A is equal for
panels B-F and H-L.
Influence of the Seed Coat on the Development of Neonate Larvae
Observations of the development of C. maculatus neonate larvae on natural seeds of V.
unguiculata showed that, at the first day after oviposition, the egg content is clear, transparent
(Figure 4A); at the fifth day, the larva is apparently formed (Figure 4B); in the inferior
surface of the egg of the fifth day it becomes visible the perforation through which the larva
digs the surface of the seed towards the cotyledons (Figure 4C); at the sixty day, we can
observe flour inside the egg giving a complete whitish aspect to the egg (Figure 4D) , the larva