ANBAR JOURNAL OF AGRICULTURAL SCIENCES

Abstract

A factorial experiment in R.C.B.D. was conducted in alluviul clay–loam soil in college of Agriculture AL-Anbar university during the growing season of 2002, There were 4 levels of potassium fertilizer (0, 20, 40, 60) kg k/ ha (K2SO4), two insecticides including (cruiser and diazinon) and two varieties of Corn (Buhooth 106 , IPA 5012).
Results can be summarized as follows:
IPA 5012 genotype recorded alowest percentage of infestation and gave ahighest rang of grains No./ row, grain yield production (3.05, 6.52) ton / ha and protein percentage in grains (10.39, 10.88)% for spring and autumn seasons respectively, while Buhooth 106 genotype recorded ahighest range of 300 grain weight (66.95 g) in spring season.
The level of 60 kg K / ha showed significantly ahighe mean of ear number in plant, grain No. / row, 300 grain weight, grain yield (3.85, 7.50) ton/ ha, protein percentage (11.28, 11.19)% in two seasons respectively and ear row number in spring season and gave alowest percentage of infestation for both seasons as compared with other levels.
There was asignificant effect (P<0.05) cruiser in adecrease percentage of in festation as well as in increase the mean of ear no./ plant, row no./ ear, grain no./ row in spring season and 300 grain weight, grain yield, protein percentage in both season.
It was concluded that the genotypical IPA 5012 was superior over the genotypical Buhooth 106 in most studied characters. The addition of potassium in a level of 60 kg K/ ha with the control of cruiser had significantly reduced the infestation percentage of the insect and increased the yields of grains per unit area and inhanced their quality.