บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of post-harvest processes on heptachlor residues in potato, sweet potato and onion.

Shivankar, V. J.; Kavadia, V. S.;

Tropical Agriculture Year: 1992 Vol: 69 Issue: 1 Pages: 25-28 Ref: 14 ref.

1992

บทคัดย่อ

Effect of post-harvest processes on heptachlor residues in potato, sweet potato and onion.

The influence of postharvest washing, boiling/cooking and dehydration on residues of heptachlor and heptachlor epoxide was determined in mature tubers/bulbs of sweet potatoes, potatoes and onions grown on clay-loam soil treated at 2.5, 5.0 and 10.0 kg a.i./ha 35 days before harvest. Washing removed 22-29% of insecticide from all crops. Washing plus peeling and cooking reduced residues of heptachlor in sweet potatoes and potatoes by 85-93 and 94-100%, resp. Dehydration reduced insecticide residues by 74-100, 80-100 and 84-100% in sweet potatoes, potatoes and onions, resp. Heptachlor residues in sweet potatoes and potatoes treated at 10 kg a.i./ha were as low as 0.03 p.p.m. after cooking, whereas no residues were found in onions.