Breakfast cereal Oats Company made a candy-coated puffed cereal, a wheat-based product similar to Cracker Jack's candy-coated popcorn. Ranger Joe, the first pre-sweetened breakfast cereal, and little more than candy-coated puffed wheat or rice, was introduced in the US in 1939. After World War II, the big breakfast cereal companies—now including General Mills, who entered the market in 1924 with Wheaties—increasingly started to target children. The flour was refined to remove fiber, which at the time was considered to undermine digestion and absorption of nutrients, and sugar was added to improve the flavor for children. The new breakfast cereals began to look
Cover crop ("Sinapis alba") and radish ("Raphanus sativus"). They can be grown after a main (cereal) crop and trap nematodes, for example the beet cyst nematode and Columbian root knot nematode. When grown, nematodes hatch and are attracted to the roots. After entering the roots they cannot reproduce in the root due to a hypersensitive resistance reaction of the plant. Hence the nematode population is greatly reduced, by 70-99%, depending on species and cultivation time. Other cover crops are used to attract natural predators of pests by providing elements of their habitat. This is a form of biological control known as habitat