Insects captured in the net are then counted. Using a sweep net can help you determine whether or not you have enough insect pests to justify a spray. Sweep nets may be used with a variety of crops. Among them are alfalfa, blueberries, canola, carrots, cotton, cranberries, onions, peas, potatoes, rice, snap beans, soybean and wheat. Among the numerous insect pests that may be captured in a sweep net are weevils, plant bugs, leafhoppers, stink bugs, aphids, bean leaf beetles, and many other pests.
Muslin is lighter in weight and dries out more quickly.
Use muslin for sweeping soft, non-brushy plants such as small grains and many vegetable crops. Sailcloth net bags are tougher and stand up to everyday duty in brushy or spiny crops like alfalfa and cotton. It's important to use a standard size, so that your results are comparable to those of others, and from one day to the next. The plane of the hoop should be perpendicular to you. Swing the net from side to side in a full 180 degree arc.