West Nile Virus Hysteria

West Nile hysteria is running rampant in the Dallas/Fort Worth Metroplex. It is the top news story these days. Sadly, a few deaths have been attributed to the virus. 

The response from most municipalities is to spray chemical pesticides to kill the adult mosquitoes. Dallas may even begin aerial spraying later this week.  I am only a couple of miles north of the Dallas border, so there is a possibility that southerly winds could blow the poison into my yard. 

Plano has sprayed several of the neighborhoods around mine in the last few weeks and my neighborhood is scheduled for spraying tomorrow night. According to the Health Department website, I can call to opt out. I don't know exactly what that means, but I plan to do call first thing in the morning.

According to people that are supposed to be experts in this area, the widespread spraying of poison is safe. Just be sure you stay inside, bring your pets inside and cover your fish ponds when the spraying takes place. Interestingly, mosquitoes usually are not flying around late at night when the poison is being sprayed.

Personally, I would rather take my chances with West Nile than have my neighborhood sprayed. I do not want my property coated with poison. I have organic vegetables growing outside that I do not want covered in poison. I have bees, butterflies, and other beneficial insects in my yard that I do not want to be harmed by the spray. I usually have a number of dragonflies in my garden. Dragonflies eat mosquitoes, but what kind of damage will the poison do to them?

The best way to solve the mosquito problem is to get rid of standing water. I have been more diligent about completely emptying my bird baths each day because I have noticed mosquito larva in the water when I just top off the evaporated water. 

Probably the biggest mosquito breeding grounds in my neighborhood are stagnant swimming pools. I live in an older neighborhood that is in transition and several houses are vacant or have residents that do not take care of their pools. One look at aerial images on Google Maps and you can easily see several dark, swampy pools in backyards. One of these swampy pools is next door to me. The house been vacant for two years and neglected for several more. I report the pool to the Health Department every spring. The city drained the pool last year. Spring rains filled the pool this year and it was drained again a couple of weeks ago. 

Enough of my ranting. Here is a link to a study indicating that spraying for West Nile may cause more harm than good. Below is a short piece by local organic expert and radio personality, Howard Garrett.


Mosquito Spraying & West Nile Virus

By Howard Garrett

West Nile Virus is the most overblown health threat since the “killer bees.” Yes, people have gotten sick and a few have even died from WNV, but people need to try to put things into perspective. Unfortunately, a few people have died this year from WNV, but thousands of people have died from asthma and other respiratory diseases.

The city of Fort Worth, TX has impressed me. They have done the right thing. They have realized that spraying does more harm than good and has spent their effort educating homeowners. The city of Dallas and other metropolitan areas across the country have been foolish. These cities have listened to the chemical pushers under the misconception that spraying toxic chemicals is helpful in controlling the mosquitoes.

Spraying toxic chemical pesticides, known generically as synthetic pyrethroids, has been the primary recommendation. Besides being toxic, this procedure doesn’t work. An adult mosquito spray program conducted late at night, as is usually done, misses the primary activity time of the pests. It also sprays or fogs down streets primarily affecting front yards of residential property. Most mosquito problems are in back yards. When these airborne toxins reach water features, ponds and creeks, a common result is the death of fish including goldfish and koi.

The risk of getting West Nile virus is remote. A very small percentage of mosquitoes have the virus, an even smaller percentage of people exposed to the virus develop symptoms and a minute percentage of those people even get sick. Deaths? Well, there are tremendously larger numbers of people who die from asthma and other respiratory diseases. Even the experts who push the toxic spraying admit that the pyrethrum and pyrethroid products adversely effect those with allergies and can actually cause those problems.

Spraying toxic chemicals for the control of mosquitoes is a waste of money, an unnecessary assault on people, pets and the environment – plus it simply doesn’t work. There are very few adult mosquitoes flying around early in the morning when the spraying is done plus there is a good argument that the spraying actually increases the mosquito problem by killing beneficial insects such as dragonflies that help control mosquitoes.

Synthetic pyrethroids like Scourge (resmethrin) are particularly hard on people with asthma and other allergies. These toxic products now contain piperonyl butoxide (PBO), a synthetic synergist that interferes with the insect’s system of neutralizing toxins. PBO makes the pesticide more effective at killing the targeted pest, but that override of the body’s detox system is also a concern for all other animals including birds, lizards, toads, frogs, beneficial insects, pets and humans. MSDS sheets (Material Safety Data Sheets) on these products available from pesticide manufactures point out that liver tumor increases in test animals has been significant. Of course, they claim that humans aren’t in danger.

Rational, effective control of mosquitoes results from removing or treating stagnant water with biological products, horticultural oils or gambusia fish and wearing non-toxic repellents on the skin.

If spraying the air to try to repel or kill adult biting mosquitoes is required, there are highly effective non-toxic alternatives. They include garlic oil, cedar oil, mint oil, orange oil, and cinnamon – just to mention a few. And yes, there is university research on these products and techniques.

Mosquitoes can be controlled and it doesn't have to be dangerous. The effective and non-toxic site management program for mosquito control that I recommend is as follows:

1. Empty standing water where possible. Even small containers such as pot saucers, old tires, soda bottles and cans hold enough water for mosquito breeding.

2. Treat water that cannot be emptied with gambusia fish or (Bti - Bacillus thuringiensis ‘Israelensis’) products such as Mosquito Dunks or Mosquito Bits.

3. Homeowners can spray to kill adult mosquitoes with plant oil pesticides such as Earth Harvest, Avenger and Eco-EXEMPT. Garlic sprays work well to repel the insects for up to 30 days. Even better, broadcast dry minced garlic to the site at 2 - 5 lbs. per 1000 sq. ft. Bonide Mosquito Beater Granules is another good dry product.

4. Use organic landscape management to encourage birds, bats, fish, dragonflies and other beneficial insects.

5. Use skin repellents that contain natural repellent herbs such as aloe vera, eucalyptus, tea tree oil, lavender, vanilla, citronella and other helpful herbs. The Center for Disease Control now recommends lemon eucalyptus. DEET products should not be used, especially on children – as is stated on the label.