Natural enemies associated with woolly aphid in apple orchards with different pest management
DOI:
https://doi.org/10.29312/remexca.v8i4.8Keywords:
Malus sylvestris var domestica, Eriosoma lanigerum, predators, parasitoidsAbstract
The woolly aphid (Eriosoma lanigerum Hausmann) is a phytophagous disease affecting apple orchards [Malus sylvestris (L.) Mill. var domestica (Borkh) Mansf.] established in Chihuahua state. In order to fight them it has been privileged the use of conventional insecticides, incurring in extemporaneous applications that possibly have repercussions in the low occurrence of natural enemies. Based on the above and the reduced information on natural enemies of woolly aphid in México, during the years 2011 and 2012 the present research was carried out with the purpose of identifying the incidence of predators and parasitoids associated with colonies of woolly aphid in apple orchards with different pest management. By orchard management, 38 and 35 individuals were detected in orchards without management and with integrated pest management, values that were statistically equal to each other and different from the 12 individuals detected in the orchard with conventional management. The species of predators associated with colonies of woolly aphid in Chihuahua were: Hippodamia convergens, Chrysopa nigricornis, Chrysopa oculata, Chrysoperla rufilabris, Chrysoperla comanche, Chrysopa spp., Allograpta obliqua, Sirphus sp. and Toxomerus sp., whereas as parasitoids only Aphelinus mali was detected.
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