Video | Agriculture | Confidence | Economy | Energy | Employment | Finance | Media | Property | RBNZ | Science | SOEs | Tax | Technology | Telecoms | Tourism | Transport | Search

 

Not all fly sprays get the job done, says Consumer NZ


3 November 2017

Not all fly sprays get the job done, says Consumer NZ

If you’re after a “natural” fly spray, you’ll be disappointed. The only fly spray containing natural pyrethrins in a Consumer NZ test left more than 80 percent of flies still alive.

“We’ve had complaints from our members some fly sprays don’t do the job. Or, if they do knock the critters down, hours later they’re back up,” Consumer NZ chief executive Sue Chetwin says.

Consumer NZ tested 10 aerosol fly sprays from five brands – Black Flag, Expra, Mortein, Raid and Zap. The test timed how quickly a spray knocked down flies and the percentage of flies killed within 24 hours of being sprayed. Six sprays killed 100 percent of the flies within 24 hours, but some products worked much faster than others.

Ms Chetwin says the fastest-acting products knocked down 50 percent of the flies in less than 20 seconds, and 90 percent in less than a minute. The product with natural pyrethrins took 26 minutes to fell 50 percent of the flies, and didn’t manage to knock down 90 percent.

Synthetic pyrethroids or natural pyrethrin, which is made from a species of the chrysanthemum plant, are the main active ingredient in fly sprays. These “knock down” agents interfere with a fly’s nervous system, causing paralysis. However, a fly’s digestive system can break down these ingredients, which is why some recover. For this reason, some products also contain synergists. Synergists don’t kill flies but delay the fly breaking down the active ingredients, giving them longer to work.

Ms Chetwin says how you use a fly spray is also important. “For the best results each fly must be hit directly by a spray droplet, rather than randomly spraying a room.”

The report is available in the November issue of Consumer magazine. More information is available at consumer.org.nz.


ends

© Scoop Media

 
 
 
Business Headlines | Sci-Tech Headlines

 


Auckland: Quarterly Update: Rents Stable During Third Quarter

The average weekly rent for a home in Auckland moved less than $1 during the third quarter, ending 30 September at $606.25, according to data from more than 16,000 rental properties managed by Barfoot & Thompson... More>>



Electricity Authority: Review Of Competition In The Wholesale Electricity Market Raises Questions

In March 2021 the Electricity Authority announced it would conduct a review into competition in the wholesale electricity market. The period of the review covers the sustained elevated electricity prices since an unplanned outage at the Pohokura gas facility in Spring 2018... More>>


Government: RSI ‘State Of The Nation’ Report Published
latest research, science and innovation system report card is now available, and outlines how the system is performing, Research, Science and Innovation Minister Megan Woods has announced. “The report seeks to increase transparency, act as a reliable data source and stimulate discussion... More>>


LAWA: New Zealand Lakes Are Diverse In Their Condition And Type

Freshwater scientists have come together through the Land, Air, Water Aotearoa (LAWA) project to summarise the condition of New Zealand’s monitored lakes. They have found a varied picture of lake condition... More>>



Pamu & Westpac: Market-leading Sustainability-Linked Loan

Westpac NZ and Pāmu have signed New Zealand’s most comprehensive Sustainability-Linked Loan to date, also the largest in the agricultural sector, and the first involving a state-owned enterprise. Pāmu, also known as Landcorp, is New Zealand’s biggest farming business. It will borrow $85m from Westpac NZ over three years... More>>


Retail NZ: Some Good News In COVID Announcements, But Firm Dates Needed

Retail NZ is welcoming news that the Government is increasing financial support for businesses in light of the ongoing COVID-19 lockdown, and that retail will be able to open at all stages of the new “Covid Protection Framework... More>>