Do-it-yourself mosquito sprays can be effective, but their effectiveness may vary depending on the specific product, application technique, and environmental conditions. Most products available to homeowners involve spray and garden hose applications. Here are some points to consider:  

1. Product Selection: Choose a mosquito control product designed for yard applications. These products may contain synthetic pyrethroids or other active ingredients that target mosquitoes. Follow the product instructions carefully, including dilution rates and safety precautions.

2. Coverage and Application: Properly cover the targeted areas, including lawns, shrubs, bushes, and other vegetation where mosquitoes rest or breed. Pay attention to areas with standing water or damp environments. Thoroughly spray the solution, ensuring even coverage.

3. Timing and Frequency: Apply the treatment when mosquitoes are most active, typically during early morning or evening hours. Follow the recommended frequency for reapplication, as indicated by the product instructions. This is usually every few weeks, but it may vary depending on the product and environmental conditions.

4. Complementary Measures: Yard sprays are most effective when used in conjunction with other mosquito control measures. Eliminate standing water sources, such as birdbaths or clogged gutters, as they serve as breeding sites. Keep your yard well-maintained, trim vegetation, and consider using mosquito-repellent products for personal protection.

It's important to note that while garden hose-applied treatments can help reduce mosquito populations in your yard, they do not guarantee elimination. Also, factors such as neighboring mosquito populations, and migration, will usually result in new mosquitos entering the area within days. Typically weather conditions and the untreated regions will impact the overall effectiveness of treatment.

Professional mosquito pest control services may be recommended for a more comprehensive approach in areas with high mosquito infestations or concerns about mosquito-borne diseases.

It is essential to follow the instruction for proper application and pay attention to recommended application rates, areas to target, and any safety precautions mentioned. 

 Consumers should remember that the market is flooded with numerous products, so select the ingredients and the concentration that best suits your needs. To effectively reduce excessive and unnecessary exposure, use to use them sparingly.

Some companies may claim that their chemicals are derived from chrysanthemum flowers, but it is important to understand that these chemicals are not obtained from natural plant extracts. Instead, commercial pyrethroids are synthetically produced to replicate the properties found in pyrethrins, which are naturally occurring compounds in chrysanthemum flowers. While both pyrethrins and synthetic pyrethroids can paralyze the nervous system of many insects, the synthetic versions and the undisclosed additives they contain are designed to be more potent and lethal.

It is crucial to note that pyrethroids are neurotoxic to humans and can result in various adverse effects such as rashes, respiratory distress, allergic reactions, headaches, nausea, convulsions, and more. Additionally, the additives included in these chemical formulations can cause a range of other reactions. Furthermore, pyrethroids pose a significant threat to fish and other aquatic life, and they have the potential to spread easily through the air to neighboring properties and water bodies. These chemicals can persist on surfaces for extended periods, leading to the continued extermination of insects that come into contact with them.