The adults and 4^th larval instar and adults of C. undecimpunctata devoured more prey compared to those devoured by 1^st, 2 and 3^rd larval instars. The fourth larval instar of the coccinellid fed upon an average of 96.7 ± 1.2 eggs and 12.0 ± 0.7 larvae of first larvae instar of the same species in Petri dish, in the absence of the spider mite (non – choice feeding). In the presence of the mite and eggs of C. undecimpunctata, the fourth larval instar fed upon 2.2 ± 0.8 eggs and consumed only 1.0 ± 0.5 larvae in 1^st larval instar of C. undecimpunctata (choice feeding), and consumed and consumed 126.0 ± 1.0 individual of spider mite in the absence of other prey (non- choice feeding). The adult of the coccinellid fed upon 10.52 ± 0.9 eggs and 5.09 ± 0.5 1^st larval instars, in the absence of the mite, but fed upon 1.08 ± 0.15 eggs in the presence of the spider mite and C. undecimpunctata eggs in the same dich. Also, the coccinellid adult fed upon 0.19 ± 0.21 first larval instars in the presence of C. undecimpunctata larval and mites found in the same Petri dish. The adults of C. undecimpunctata consumed 45.83 ± 1.17 individual of the spider mite in the absence of eggs and larvae of C. undecimpunctata.

Data of cannibalism and predatory efficiency show that eggs and 1^st larval instars of C. undecimpunctata are more devoured by C. undecimpunctata adults comparing to 4^th larval inster and larvae of the coccinellid. The two-spotted spider mite is the preferred to all stage of the coccinellid. Results show that scarcity of the prey is one the main reason to cannibalism phenomenon, but it is a conspecific behavior of all coccinellids to keep all species.