Abstract
Given the apparent importance ofladybeetles as biological control agents of theinvasive Asian citrus psyllid, Diaphorinacitri Kuwayama (Homoptera: Psyllidae), aseries of experiments were undertaken to assessthe nutritional suitability of this pest as aprey item. Five species of Coccinellidae wereshown to develop successfully on a diet ofpsyllid nymphs and four species produced viableeggs. Eggs of the flour moth, Ephestiakuehniella Zeller (Lepidoptera: Pyralidae)were used as a reference diet. Larvae of Curinus coeruleus Mulsant, Cyclonedasanguinea L., Exochomus childreniMulsant, Harmonia axyridis Pallas, andOlla v-nigrum Mulsant all had survival ona diet of D. citri nymphs not differentfrom 100%, although developmental times wereextended and adult dry weights were reducedrelative to the Ephestia egg diet. Species were ranked (highest to lowest) forlarval performance on the D. citri dietrelative to the Ephestia egg diet as:E. childreni, 0.85;O. v-nigrum,0.82; C. coeruleus, 0.80;H.axyridis, 0.71;C. sanguinea, 0.48. Most females of C. sanguinea ceasedoviposition on the second day followingtransferal to the D. citri diet, but thefecundity and fertility of females of the otherspecies were not different from those feedingon Ephestia eggs. Generation times onthe Ephestia egg diet at 24°C(time to egg hatch + larval developmental time+ pupation time + adult prereproductive period)were (mean ± SEM): C. coeruleus, 56.7± 1.32 d;C. sanguinea, 28.0 ±0.88 d;E. childreni, 60.8 ± 1.96 d;H. axyridis, 32.2 ± 1.47 d;O.v-nigrum, 25.8 ± 1.12 d. Adult females ofC. coeruleus, H. axyridis and O.v-nigrum consumed the most psyllids in oneh, C. sanguinea was intermediate, andE. childreni consumed the least.
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Michaud, J., Olsen, L. & Olsen, L. Suitability of Asian citrus psyllid, Diaphorina citri, as prey for ladybeetles. BioControl 49, 417–431 (2004). https://doi.org/10.1023/B:BICO.0000034605.53030.db
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DOI: https://doi.org/10.1023/B:BICO.0000034605.53030.db