kochab, there is truth to this. they use infrared to detect the heat signature of the plants. I have heard conflicting reports of what plants have similar signatures. I have heard blueberries have a similar signature but with no one to verify i have not a clue to whether its true
and potato, sick grow, got me thinking for next year
After seeing the plants i decided only to harvest the female which has been flowering for the longest (about 4.5 weeks) and let the others go for another 2 weeks.