B Quiz Version: Environmental Protection – Part I

________________________ is defined as the movement of spray particles or droplets in the air away from the site of application.

A pesticide that vaporizes easily is said to be _________________________.

One should avoid using a(n) _____________________ pesticide when conditions such as low humidity and high temperature favor vapor formation.

A number of factors affect the drifting of pesticide particles.  This …

To minimize drift, apply a pesticide from ______________________  to the target as is practical.

Pesticides applied to soil are often times held tightly by the ________________ soil particles.

Two-thirds of this fresh water is groundwater.  The rest is found in lakes, ponds, streams and rivers.  The potential for groundwater contamination with pesticides is ______________________.

Pesticides can enter groundwater by two methods.  The first way is by leaching through the soil and into the groundwater.  The other method is by entering through ____________________, wells or other structures in direct contact with the groundwater. 

Soils high in _________________________ or clay are most adsorptive, and coarse sandy soils are much less adsorptive.  A soil adsorbed pesticide is less likely to leach into groundwater.

Some pesticides are very volatile and turn into a gas quite easily.  If this happens, the pesticide leaves the soil and there is little chance of groundwater pollution.  Factors that speed up the volatilization of a pesticide include ________________________, low relative humidity, and small droplet size.