الفهرس 
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Abstract
The current study was executed at Experimental Farm of the Faculty of Agriculture ElShatby, Alexandria University during two seasons 2020/2021- 2021/2022. The present
investigation for control dodder weed in Egyptian clover. Nine herbicides were used to
control dodder, pendimethalin, diquat, sulfosulfuron, rimsulfuron, glyphosate,
napropamide, pronamide, imazapic, and glufosinate. The best herbicides treatment in
decrease of fresh, dry weight and seed of dodder were diquat (750ml/fed.), glyphosate
(75 ml/fed.), pronamide (1200g/fed.), and pendimethalin (1L/fed.). Diquat had a
phytotoxic effect on Egyptian clover. Also, rimsulfuron (10g/fed.) and glufosinate
(100ml/fed.), had a same effect on Egyptian clover. Pendimethalin at (1L/fed.),
pronamide at (1200g/fed.), and glyphosate at (75g/fed.), were increased the production,
seed yield and plant height of Egyptian clover.
The pattern of genetic diversity within and among ten Cuscuta ecotypes collected from
different regions of Alexandria in Egypt was assessed by using inter-simple sequence
repeat (ISSR) markers. Six ISSR primers (ISSR-4, ISSR-5, ISSR-6, ISSR-8, ISSR-11,
ISSR-13) were generated a total of 113 bands, of which 99 bands were polymorphic.
Polymorphism information content (PIC) and Heterozygosity (H0) averaged 0.3925
and 0.41, respectively. The similarity index ranged from 0.00 to 0.61. The lowest pairwise similarity (0.00) coefficient was between C. Alex. And C. E. F from different
geographical regions) and between C. E. F and C. Ap. P from different geographical
regions. The highest similarity (0.61) was between C. E. Fl and C. Ap. Je. A
dendrogram based on UPGMA analysis with ISSR data is shown the genetic similarity
of 20% two groups of ecotypes were identified.