True or False: High pressure must be maintained in a handheld sprayer to be effective.

In pest control, the effectiveness of a handheld sprayer does not necessarily depend on maintaining high pressure. Handheld sprayers are designed to deliver a consistent and controlled application of pesticides, and many formulations are effective at various pressure levels. Maintaining high pressure can lead to overspray, drift, and even potential damage to non-target plants and surfaces due to excessive application.

Additionally, certain chemicals have specific application requirements that may call for lower pressure to ensure proper coverage without causing harm or waste. Therefore, it is essential to understand the manufacturer's recommendations for the specific pesticide being used, which often include details on the optimal pressure settings.

Regarding the other options, there are indeed chemicals that may require specific application techniques or pressures (but not universally high pressure), and certain practices are more suited for outdoor environments due to wind factors, which could also lead to the misconception that only outdoor spraying needs high pressure. However, the statement that high pressure must be maintained in handheld sprayers is not accurate across the board, highlighting that effective application is about more than just pressure.