Macrosiphum rosae (Linnaeus, 1758)

Carvalho, Marília Mickaele Pinheiro, Vieira, Daniel Amorim, Pec, Marvin & Souza, Brígida, 2022, Inter - and intraspecific relationships between Macrosiphum rosae (Hemiptera: Aphididae) and Chrysoperla externa (Neuroptera: Chrysopidae), Revista Brasileira de Entomologia (e 20220086) 66, pp. 1-8 : 2

Consumption of Macrosiphum rosae nymphs and adults by Chrysoperla externa larvae

All larvae of C. externa consumed M. rosae of different stages ( Fig. 1 ). The number of predated young aphids in each lacewing instar was significantly higher than that observed for older aphids (F = 1246.999; df = 1; p <0.001). Consumption increased significantly with the development of lacewing larvae (from the first to the third instar) (F = 2479.545; df = 2; p <0.001). There was an interaction between the consumption of aphids at the different stages and the developmental stages of C. externa (F = 5.927; df = 2; p <0.01) ( Fig. 1 ).

C. externa first-, second-, and third-instar larvae had an average daily intake of 5.38, 10.87, and 66.95 second- and third-instar nymphs and 2.19, 4.18, and 21.63 fourth-instar/adult M. rosae , respectively ( Fig. 1 ). The daily intake of young nymphs by first- and second-instar lacewing larvae was double that of fourth-instar nymphs and adults. Third-instar larvae consumed young specimens at three times the rate of older specimens ( Fig. 1 ). Third-instar larvae were responsible for 80% of the average daily intake of young aphids and 77% of the consumption of older aphids.

Figures

Figure 1 Mean daily number (± SE) of younger (second- and third-instar) and older (fourth-instar and adult)Macrosiphum rosea specimens consumed by first-, second-, and third-instar larvae ofChrysoperla externa. Different letters abovethe columns,uppercase for the larval stages of the chrysopid and lowercase for the aphid ages, indicate significant differences between the treatments according to Tukey’s multicomparison test (p <0.05).L1,L2,and L3 = larvae of the first, second,and third instars of the chrysopid; N2-3 = second- and third-instar nymphs of the aphid; N4-Adult = fourth-instar and adult aphids.