Chrysodeixis eriosoma (Passoa, 2007)

Sylva, Grant T. McQuate Charmaine D., 2018, Looking for Leisure, Proceedings of the Hawaiian Entomological Society 50, pp. 43-53 : 48-50

Chrysodeixis eriosoma response to the binary Omphisa anastomosalis male

lure. Although the overall test for significance of differences among trap locations fell just out of the range of significance (F = 3.96; df = 2,9; p = 0.0583), there were significant differences in mean separation, with average trap catch highest in interior traps (1.25 per trap per week) and lowest in border traps (0.41 per trap per week) (Figure 4).

Bioassay 4. Test of male Chrysodeixis eriosoma response to C. chalcites male lure in sweetpotato field. Chrysodeixis eriosoma catch was highest in the first week of trapping, averaging 33.3 ± 5.8 moths per trap per week (range 27–45). Trap catch dropped off in subsequent weeks, with no catch in weeks 7 and 8. The drop off in catch was fit well by a 2

Height of Trap Above Foliage (m)

Trap Location

Figure 4. Average total Chrysodeixis eriosoma catch over eight weeks at interior, edge, and border locations in a sweetpotato field near Honomu, Hawaii island, Hawaii. Columns with the same letter at top are not significantly different at the α = 0.05 level (3 April–29 May 2018).

1 2 3 4 5 6 7 8

Weeks

Figure 5. Average weekly catch of Chrysodeixis eriosoma over eight weeks in an incrop sweetpotato field near Honomu, Hawaii island, Hawaii. Also shown is a fitted 2 parameter exponential decay curve: Average weekly catch = 55.906*e (-0.596*[no.of weeks]) (F = 21.56; df = 1,6; p = 0.0035 [r 2 = 0.78]) (13 February–10 April 2018).

parameter exponential decay curve: Average weekly catch = 55.906*e (-0.596*[no.of weeks]) (F = 21.56; df = 1,6; p = 0.0035 [r 2 = 0.78]). Based on the generated exponential decay curve, trap catch dropped down to 50% of the initial catch by 2.16 weeks (Figure 5).