What device is commonly used to measure the number of mosquito larvae per sample dip in a breeding site?

The device commonly used to measure the number of mosquito larvae per sample dip in a breeding site is the dipper. This tool is specifically designed for water sampling and allows users to collect a precise volume of water from potential mosquito breeding habitats, such as ponds, marshes, or containers. The dipper is typically shaped like a small cup or scoop that is attached to a handle, making it easy to reach into water sources and obtain samples.

When using a dipper, the number of larvae found in each sample can be counted, providing valuable data for assessing mosquito populations and identifying the presence of breeding sites. This information is crucial for targeted mosquito control efforts and understanding the ecology of mosquito species in the area. Other devices listed, such as larval collectors, net traps, and insect aspirators, serve different purposes in mosquito monitoring or collection but are not specifically designed for counting larvae in a defined water sample.