Tambayan ng Kaalaman Tungkol sa Pilipinas
BIO-CONTROL OF CROP DISEASES
Many of our local plants contain helpful chemicals, particularly alkaloids, that are effective against fungal and bacterial diseases of other plants. Thus, they are mixed with the soil to control the fungus that causes the diseases of seedlings. Allow the leaves to decompose for about one week before transplanting the seedlings. Some of these leaves are as follows:
Atis is cultivated throughout the Philippines and is occasionally spontaneous. It was introduced from tropical America by the Spaniards at an early date and is now pantropic in cultivation.
The plant is a small tree to 3 to 5 meters in height. The leaves are somewhat hairy when young, oblong and 8 to 15 centimeters in length, with a petiole 1 to 1.5 cm long. The flowers occur singly in the axils of the leaves and are about 2.5 cm. long. They are pendulous, hairy , three angeld, and greenish-white or yellowish. The fruit is large, somewhat heart-shaped, and 6 to 9 cm in length. The outside of the fruit is marked by polygonal tubercles. When the fruit is ripe, it is a light yellowish green. The flesh is white, sweet, soft and juicy and has a mild, very agreeable flavor.