The analysis also showed that location of the treatment plots within the 'Loring' orchard did not have any significant effect on the number of plum curculios that emerged from the treatments in 2008 ([F.
The generally low level of emergence recorded in both the field and greenhouse studies suggests that immature plum curculios in the soil are highly prone to natural mortality factors.
Plum curculio is currently a serious pest of peaches in Alabama and much of the southeastern U.
Given these variables, we hypothesized that the type of weed management practices used by peach growers would impact the development of the soil dwelling immature stages of plum curculio and ultimately adult emergence from the soil.
The objective of this study was to evaluate the effects of some commonly used weed management practices on the development of the pre-pupae and pupae of plum curculio in the soil.
The colony of plum curculio larvae used for the greenhouse study was maintained on pesticide-free green thinning apples in a growth chamber at 25 [+ or -] 1[degrees]C, 65-70% RH, and 12:12h L:D.
The 2007 study was done in an unmanaged peach orchard that had not received any insecticide or fungicide application since its establishment in 1985, and high plum curculio populations had historically been recorded in the orchard.
All treatments were established on autoclaved field soil in order to eliminate the effects of predators of plum curculio such as ground and tiger beetles, ants and spiders (Jenkins et al.
Twenty newly emerged, laboratory-reared fourth-instar larvae of plum curculio (~15-18 mg each), were introduced into each PVC pipe (plot).
Significant differences were recorded in the emergence of adult plum curculio from the different weed management treatments in the unmanaged peach orchard in 2007 ([F.
Although several insects were caught in the pitfall traps; we report those which have previously been shown to be important predators of plum curculio (Jenkins et al.