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Rearing

Big-eyed bugs are easy to rear. Adults can be purchased (see Suppliers) or collected in the wild by using a sweep net in a local alfalfa field, roadside or other lush area that may have potential insect prey. A Petri dish provides adequate housing when a piece of paper towel or filter paper is placed in the bottom and cut to fit the dish. Adults and nymphs should be housed separately as the larger individuals will eat the smaller ones. If you plan on raising large numbers of them, you may want to invest the time in making an artificial diet (see Cohen in the References), however they will also do well with fresh insect eggs (purchased), whitefly nymphs or aphids provided every few days. For moisture, place a one-inch piece of fresh green bean (replaced every couple of days) in the dish. A small piece of cotton placed in the adult cage provides a place for oviposition as well as a hiding place. Periodically remove the cotton from the cage (eggs are pale orange) and place it in a new cage with a fresh piece of green bean. In a week to ten days, nymphs will emerge and a protein source (eggs, diet, etc...) will need to be added. When cages become dirty or moldy, transfer adults and nymphs to a fresh cage. Adults can be handled with soft forceps or with a small soft paintbrush. Nymphs should be handled with a soft brush only.

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托业考试(TOEIC)听力背景辅导汇总