It is a beautiful, harmless but most likely useless method to fight against Zika. I think it is a good solution to reduce the population of insects in cities where gardening is part of recreation areas. But not a method to fight health threats in poor regions of South America.
The information where the disease spreads out, is essential for the control of epidemic diseases. I think a problem could be the missing having of smartphones and the lack of internet reception in some parts of the affected areas in South America. But still an excellent alert system.