المكافحة الكيماوية للأعشاب الحولية الضارة النامية مع محصول الثوم في وادي حضرموت-الجمهورية اليمنية

الملخص EN

Two Experiments were conducted during 88/89-89/90 crop-ping seasons in the Agriculture Research Center of Seiyun of Wadi Hadramout, R.

Yemen for the selective control of annual weeds in irrigated garlic (Allium sativum) under local conditions.

Treatments included pendimethalin, oxadiaz-on, ioxynil + oxadiazon, linuron and fluazifop-butyl in addition to a hand-weeding and untreated plot as control.

Results indicated that pendimethalin, oxadiazon and the mixture (ixoynil + oxadiazon) at 1.0, 1.0 and (0.5+0.5) kg a.i./ha respectivly, gave good reduction of the broad leaved and grass weeds at 60 days after spraying (76, 99 %, 80, 97 %, and 90, 99%, respectively).Oxadiazon did not prevent Datura innox-ia, Schouwia thebaica and Echinochloa colonum at later periods of the growth.

The effect of the mixture (ioxynil+oxadiazon) was not adequate for controlling some grasses and broad leaved weeds, while the effect of pendimethalin was good for controlling grass and some of broad leaved weeds up to 60 days after spraying.

The hand weeding treatment gave similar results compared with those herbicides and with the exception of linuron did not cause phytotoxicity, and they gave significant yield compared with the control treatment.