sentences:  Nymphs are active during the summer and in the tropics the bug can achieve three to six generations a year.In the northern range there is only one generation annually and the insects overwinter as adults in crop residues or field edges.Organic control involves hand-picking the insects off the plants (they can be dropped into soapy water to drown them) and being especially careful to remove and destroy all the eggs, which are black-and-white striped, laid in clutches of twelve.