Study on the influence of artificial foods on biological characteristics of the guava fruit fly Bactrocera correcta Bezzi

Abstract

The purpose of this study is to evaluate the impact of four artificial diets on the growth and development of the guava fruit fly, Bactrocera correcta Bezzi. The experiment was conducted by rearing individuals in a incubator at 28°C and humidity of 70 - 80%, and 12L:12D photoperiod using four artificial diets with the major ingredient: yeast (TA1), wheat bran (TA2), rice bran (TA3) and ground longan (TA4). The results show that the weight of adult female B. correcta reared on TA2 (12.819 mg), TA3 (12.139 mg) had a significantly heavier than when reared on TA1 (11.948 mg), TA4 (11.335 mg). Female feeded with TA3 had the shortest lifespan (32.30 days), followed by TA2 (33.26 days). The daily and total number of eggs of adult females reared on TA4 (8.78 eggs/day and 319.43 eggs/female, respectively) were significantly lower than those reared on the other diets. The net reproductive rate (Ro) of the guava fruit fly reared on TA2 (276.52) was the highest, followed by TA3 (270.86), TA1 (252.91), and the lowest was TA4 (182.52). The Intrinsic rate of increase (r_m) when reared on TA3 was the highest (0.136) compared to TA1 (0.131), TA2 (0.119) and TA4 (0.103). These results indicate that the most suitable diet for B. correcta is the one primarily composed of rice bran (TA3) and wheat bran (TA2).