From ancient times, corn has been intercropped with squash and beans in Mexico and has provided a sustainable cropping system and a balanced diet for man as well. Corn has been the major source of carbohydrates and fats; beans provided proteins; and squash vitamins and minerals. However, it was also observed that pests were well managed, including weeds, which were
ISSN 0031-7454
PHILIPP AGRIC SCIENTIST
Vol. 96 No. 1, 48–54
March 2013
The Philippine