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Seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani, in relation to the pecan aphids,Monellia caryella andMonelliopsis pecanis and their common predators

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Abstract

The seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani (Kirkaldy), and the majority of its predators that are common with the yellow pecan aphid,Monelliopsis pecanis Bissel, and the blackmargined aphid,Monellia caryella (Fitch), were determined in norh Florida.S. kahawaluokalani populations were tri — and bimodal in the 2 years studied and peak populations ofS. kahawaluokalani preceeded those of the pecan aphid complex. Peaks in predator populations consisting of Coccinellidae, Syrphidae, Chrysopidae and Anthocoridae, either coincided with or occurred just afterS. kahawaluokalani peaks.

The implications of the findings with respect to use ofS. kahawaluokalani as an alternate host of predators of pecan aphids and the potential for manipulation of the system to enhance biological control in pecan are discussed. The use of this system is advocated for augmentation and manipulation of generalist predators in other crop systems.

Résumé

L'abondance saisonnière du puceron de la myrte noire,Sarucallis kahawaluokalani (Kirkaldy) et la majorité de ses prédateurs qui sont communs avec les pucerons du pacanier,Monelliopsis pecanis Bissell etMonellia caryella (Fitch) ont été déterminés dans le nord de la Floride. Les populations deS. kahawaluokalani furent tri et bimodales au cours des 2 années étudiées et les populations maximales deS. kahawaluokalani précédaient celles du complexe des pucerons du pacanier. Les sommets des populations de prédateurs représentés par desCoccinellidae, desSyrphidae, desChrysopidae, desMiridae et desAnthocoridae soit coïncident, soit se produisent juste après les sommets deS. kahawaluokalani.

L'implication de ces observations en ce qui concerne l'emploi deS. kahawaluokalani, comme hôte alternant des prédateurs des pucerons du pacanier et les possibilités de manipulation du système pour accroître la lutte biologique dans le cas du pacanier sont discutées. L'emploi de ce système est préconisé pour augmenter et manipuler des prédateurs polyphages dans d'autres systèmes de culture.

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Assistant professor of Entomology and Biologist II, respectively.

Florida Agricultural Experiment Station Journal Series No 7294.

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Mizell, R.F., Schiffhauer, D.E. Seasonal abundance of the crapemyrtle aphid,Sarucallis kahawaluokalani, in relation to the pecan aphids,Monellia caryella andMonelliopsis pecanis and their common predators. Entomophaga 32, 511–520 (1987). https://doi.org/10.1007/BF02373520

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