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• <br />• <br />R,L <br />10 20 30 40 <br />o~ <br />(vs) Average midsummer water I.U <br />temperature within <br />pools, backwaters, or ~ 0.8 <br />littoral areas (Adult): ~ <br />.-, <br />,~ 0.6 <br />•~ , <br />r <br />•r <br />~ 0.4 <br />+~ <br />•r <br />"' 0.2 <br />0.0 <br />R,L (U6) Length of agricultural 1.0 <br />growing season (frost- x <br />free days). ~ O,g <br />c <br />Note: This variable <br />is optional. ~ 0.6 <br />•r <br />r <br />~ 0.4 <br />n ~, 0.2 <br /> <br />0 125. <br />Days <br />R,L (V,) Maximum monthly average'- <br />250 <br />~ ~ <br />]t <br />F <br /> <br />.100 200 <br />PPm <br />11 <br />300 <br />