Plant Pollinator interactions in high temperatures
themselves,
but flowers do not have stomata or any other means
to cool themselves. In low humidity, bumblebees are
also less active and do not find flowers [...] only if the radiation is at an intensity of no
more than 400 watts. The table in figure 3 gives a
representation of what the best conditions are for
p [...] pollination. Of course, these are approximations and
should only serve as a guideline. There are differences between varieties. Radiant heat affects the