Per cent Hopper Development undergone

Similar to egg incubation this model (Figure 18) calculates per cent development of hopper through various instars using daily air temperature. Like egg incubation per cent development undergone per day is integrated over the requested period and the value is returned. Here the inputs required are date of sighting of hoppers in the field along with approximate development till that time and the date on which percent development is sought. For generalization the model uses the growth curve of DL but with availability of species specific growth curve choices could be given to the users for selection of model.

The output menu of the Life Cycle Builder is given in Figure 19.

P ■ h:nzi ■ nw

•i1

MR

y

/

--

Figure 18: Air temperature vs per cent hopper development of desert locust

Figure 19: The Life Cycle Builder output
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