This is one of the sprays that was used in Auckland...it was used here in Dec 1997 in a field trial of aprox 10,000 people in India.
Don't they just love to use humans as guniea pigs?
Here are the other two sprays that were used first....
Lorsban 50 ...very toxic to aquatic organisms, may cause long term adverse effects in the aquatic environment....guess what? Auckland is surrounded by sea. Fabulous.
Chlorpyrifos is an organophosphate, with potential for both acute toxicity at larger amounts and neurological effects in fetuses and children even at very small amounts. For acute effects, the EPA classifies chlorpyrifos as Class II: moderately toxic. Recent research indicates that children exposed to chlorpyrifos while in the womb have an increased risk of delays in mental and motor development at age 3 and an increased occurrence of pervasive developmental disorders such as ADHD.  An earlier study demonstrated a correlation between prenatal chlorpyrifos exposure and lower weight and smaller head circumference at birth. 
Studies have shown evidence of "deficits in Working Memory Index and Full-Scale IQ as a function of prenatal CPF exposure [as measured when the children reach] 7 years of age." 
The oral LD50 for chlorpyrifos in experimental animals is 32 to 1000 mg/kg. The dermal LD50 in rats is greater than 2000 mg/kg and 1000 to 2000 mg/kg in rabbits. The 4-hour inhalation LC50 for chlorpyrifos in rats is greater than 200 mg/m3. 
Chlorpyrifos poisoning has been described by New Zealand scientists as the likely cause of death of several tourists in Thailand who developed myocarditis in 2011.    Thai investigators have come to no conclusion as to what caused the deaths,  but maintain that chlorpyrifos was not responsible, and that the deaths were not linked. 
A 2011 study on the neurotoxic effects of chlorpyrifos showed that chlorpyrifos and its more toxic metabolite, chlorpyrifos oxon, altered firing rates in the locus coeruleus. These results indicate that the pesticide may be involved in Gulf War Syndrome and other neurodegenerative disorders. 
This is what they sprayed us with in Auckland in 2002.