Triticum compactum erinaceum Triticum compactum erinaceum Triticum compactum erinaceum, also called California Club Wheat or Mayview wheat, is an extinct subspecies of the hexaploid club wheat Triticum compactum. "T. compactum erinaceum" was a bearded, hairy rachis, red-chaffed wheat named for its appearance similar to that of a hedgehog. "T. compactum erinaceum" was thought to have disappeared before 1822. However data from the United States Department of Agriculture indicates two additional specimen that were discovered and identified as "T. compactum erinaceum" more than a hundred years after their presumed disappearance. The new specimen indicate that "T. compactum erinaceum" was grown in the United States
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