Asian corn borer, Ostrinia furnacalis (Guenée), is the most destructive pest of corn in China. It causes 6 to 9 million ton yield loss in an average year. Biological control using releases of Trichogramma has increased greatly since T. dendrolimi Matsumura can be successfully mass reared on eggs of the Chinese oak silkworm, Antheraea pernyi Guérin-Méneville. The process and technique for mass p...

many researchers have reported positive effects of converter sludge and slag, two by-products in isfahan iron melting factory. in this work, the optimum rate of application and the availability of some essential elements (for plant growth) in the converter sludge and slag for corn were investigated. the converter sludge contains about 64% fe іі and ііі oxides and some other essential elements f...