[Edited_by_A._Ciancio,_C.N.R.,_Bari,_Italy_and_K.(Bookos.org)

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R. CAMPOS-HERRERA ET AL.
indirectly by affecting the community composition and predatory efficacy of
endemic EPN species. Surveys that measured numbers of Diaprepes larvae falling
from the canopy to the soil and numbers of adult weevils emerging from the soil
over the course of 2 years concluded that the net survival rate from hatched egg to
teneral adult is ~ 0.7–1.6% (McCoy et al., 2003).
Figure 3. Representation of EPN population density distribution using a biplot in which
vectors show the loading factors of the original variables on the associated factorial axes.
(a) Association with cultural practices: NA, natural area, OPC, organic perennial crop, CPC,
conventional perennial crop, OAC, organic annual crop, CAC, conventional annual crop.
(b) Association with sand, silt and clay contents, available water, and organic N, Zn and Cu
concentrations. Circles show EPN population density by increasing the diameter as
population size increases (from Campos-Herrera et al., 2008).