Which feature of ULV distribution improves effectiveness in pesticide delivery?

The feature of ULV (Ultra-Low Volume) distribution that enhances the effectiveness of pesticide delivery is characterized by lower concentrations and higher droplet rates. This method allows for a more efficient application, as it uses minimal amounts of pesticide while maximizing the number of droplets released. By producing a higher volume of smaller droplets, ULV application can achieve better dispersion of the pesticide, allowing it to cover a larger area and reach difficult-to-access areas.

The smaller droplets created in ULV applications are crucial because they can remain airborne for longer periods, increasing the chances of these droplets encountering and settling on target pests. This leads to improved contact with the insects and better overall efficacy of the pesticide.

In contrast, other options do not necessarily contribute to effective pesticide delivery. For instance, the use of harsh chemicals may not improve effectiveness if the application method does not allow for optimal distribution. Higher pressure levels during application can lead to larger droplet sizes, which might not disperse as effectively. Lastly, larger droplet sizes can compromise coverage and lead to uneven application, as fewer small droplets will drift or settle evenly across a targeted area.