Run n° Doses of crude chitinases (%) Contact time (h) Mortality rate of Callosobruchusmaculatus (%) 1 2 3 4 5 6 7 8 -1 +1 -1 +1 0 0 0 0 -1 -1 +1 +1 0 0 0 0 10 100 12.33 100 33 40.8 37 39.5

Table 2: Experimental design and observed responses.