التأثير الثانوي لمنظمات النمو الأوكسجين (IAA)‎ و الجبرلين (GA3)‎ في حشرتي (من اللهانة Brevicoryne brassica)‎ و (دودة أوراق اللهانة الصغيرة Pieris rapae)‎ على البروكولي

Abstract EN

Field experiment were conducted at the agriculture technical institute in Bakrajo, Sulaimani Polytechnic University during 2012-2013 seasons in order to study secondary effects of two plant growth regulators (GA3 and IAA) with 100 and 200 mg.l-1 and two sprays for each on small cabbage butterfly (Pieris rapae) and cabbage Aphid (Brevicoryne brassica) for two Broccoli cultivars (Late purple sprouting and Autumn spear calabrese).Results showed that there were a significant were effects in the reduction of infestation ratio for the two insects.

Lowest infestation ratio with small cabbage butterfly (16.66%) after the first spray for Autumn spear calabrese with concentration rate of 200 mg.l-1 GA3 but the lowest infestation ratio after the second spray was (6.14%) for the two cultivars with 200 mg.l-1 GA3.

Whereas the lowest infestation ratio with cabbage aphid after the second spray was (3.33%) for Late purple sprouting with 200 mg.l-1 GA3.

Growth regulators have different significant effects on: leaf number, leaf area per plant, main head weight and total yield per plant.