effect of soli treatment with bassamid [dazomet] on orobanche crenata and cuscuta planiflora

In greenhouse trials, basamid was applied to pots filled with alluvial soil at a rate of 0, 0.2, 0.4, 0.8 and 1.2 g/4000 cm3 soil infested with the seeds of either Orobanche crenata or Cuscuta planiflora to study the efficiency of this compound in controlling Orobanche crenata parasitism in bean plants and Cuscuta planiflora in clover. Soil moisture was maintained at 60 - 70% water holding capacity for 10 days before planting Vicia faba cv. Giza 3 or Trifolium alexandrinum cv. Sakha I. All concentrations of basamid prevented completely the infestation of Vicia faba by Orobanche crenata, however, only the highest rate [1.2 g] gave complete control of dodder. No harmful effects or abnormalities were observed on bean or clover growth

Economizing the use of the herbicide glyphosate in controlling purple nutsedge [cyperus rotundus] in increasing its phytotoxicity with urea

The influence of mixing different concentrations of urea on the toxicity of glyphosate [N-phosphonomeihyl glycin] on purple nutsedge [Cyperus rotundus L.] was evaluated. Generally, glyphosate sprays significantly inhibit the growth of foliage as well as the underground propagative organs of purple nutsedge. Mixing 300 ppm glyphosate with the lower rate of urea [2.25 g N/l.] induced about 50 percent inhibition in the number of propagative organs as compared with those sprayed with glyphosate alone. However, mixing glyphosate at 600 ppm with the same concentration of urea induced 75 percent inhibition in the number of propagative organs as compared with those sprayed with the same rate of glyphosate. Moreover, complete eradication of purple nutsedge could be achieved by 300 ppm glyphosate mixed with urea at a rate of 4.50 or 6.75 g N/L Undoubtedly, this result could lower the cost of controlling this troublesome perennial weed