Fig. 2
From: Bio-economics of Indian hybrid Bt cotton and farmer suicides
A partial cotton-herbivore-natural enemy PBDM system showing the flow of energy/dry matter within the plant and to herbivores attacking different plant subunits including the transmission of disease from a phloem feeding herbivore, and some of the generalist natural enemies attacking the herbivores. The herbivore biology is expanded to show stage structure, noting that natural enemy models would have similar form (not shown). All the sub-models have fine-scale age structure dynamics