Subject: Why do farmers paint the tyres in their tyre garden white?

Tyre gardens are when farmers plant their crops in tyres from cars. They 
do this to conserve space and to use less water per plant area. That is, 
to improve the water usage and better the plant control. They prevent 
water evaporating from the plant's surface, at a fast rate, which they 
need to photosynthesize. I have seen the tyres being painted white to stop 
insects from attacking the plant. Still, I have no idea how or why it does 
this. May it have any reason to do with the fact that white surfaces 
reflect more light than back surfaces? Does the strong light blind them in 
some way?  

Re: Why do farmers paint the tyres in their tyre garden white?