ChileanJAR

Adalia angulifera Mulsant is a coccinellid predator of the hazelnut aphid, Myzocallis coryli (Goeze), which is specific of hazelnut, of Corylus avellana L., in the La Araucanía, Chile. The life cycle was studied in the Carillanca Experimental Station of the National Agricultural Research Institute (INIA), Temuco, Chile (38º41’ S lat; 72º 25’ W long; 200 m.o.s.l.). Coccinellids and aphids were reared under laboratory, conditions at 19.23 ± 2.71ºC; 60.78 ± 3.34% of relative humidity and a variable photoperiod of 14 to 16 h of natural light from October to November. Under these conditions, the life cycle of A. angulifera was completed in 37.39 ± 1.55 days with a range of 24-59 days. The egg stage represented 18% of the life cycle, the larval stage 58.3% and the pupa 23.7%. The larvae stage also presented three, four and five instars, being four the most common. Larvae with three and five instars had a longer life period. Adult longevity was 71 ± 59.79 days with a range of 32-249 days. Female longevity was 72.25 ± 67.41 days with a range of 34-249 days, while males lived 67.67 ± 31.20 days with a range of 32-108 days. This study concluded that A. angulifera had three generations, in adults were observed in winter diapause, under bark tree or in the scrack of fence posts in the La Araucanía.