I have not seen much of a connection between a lack of water and whitefly. I grow mine in a mix of hydroponic and soil based culture and have been pretty slack with watering in the soil based plants at times in the past. I haven't noticed much diffence in the level of infestation of whitefly between the two. Cheers Dale in Tassie Mad King Michael wrote "Riley MANY YEARS AGO AFRIEND - JUNE FEAR_ SHOWED ME ASIMPLE WAY TO GET RID OF WHITE FLY. Just spray with seaweed fertiliser.!! It works! Whitew fly are also an indication of not enough water."