White eclipta

Eel white eclipta Amr common amaranth Xan Siberian cocklebur Car hairy bittercress For purslane Med clover Ech barnyard grass Dig crab grass... 

Bra rape Abu chingma abutilon Amr common amaranth Eel white eclipta... 

On the basis of preliminary bioassay, post-emergence herbicidal activity of most IH was farther examined at 450 and 150 g ai/ha in the greenhouse. The results ofpost-emergence herbicidal activity against rape, chingma abutilon, common amaranth, and white eclipta are listed in Tables 2.44 and 2.45. The data in... 

Bij leaf mustard Cas sickle senna Eel white eclipta Amr common amaranth Cer field chickweed For common purslane... 

Abu chingma abutilon Bij leaf mustard Amn common amaranth Eel white eclipta Ech bamyaid grass Dig crab grass Set green bristlegrass... 

Inhibitory potency (%) against the growth of plants in the greenhouse, 0 (no effect), 100 % (completely kill) Brj leaf mustard Amr common amaranth Eel white eclipta... 

As seen from Table 5.15, IVC-I6 and IVC-18 only had 80-90 % inhibition against leaf mustard, but weaker herbicidal effect against common amaranth and white eclipta at 37.5 g ai/ha. Other compounds IVC-I5 and IVC-I9 showed much weaker herbicidal effect against tested broad-leaved weeds at 37.5 g ai/ha. The herbicidal activity of cyclic phosphonates IVC-I5, IVC-I6, IVC-18, and IVC-I9 were not comparable to clacyfos (IC-22, HW02). 

Cyclic phosphonates IVE-2, IVE-7, IVE-9, IVE-Il, IVE-12, and IVE-13 were further examined for their post-emergence herbicidal activity against leaf mustard, common amaranth, and white eclipta at 75 and 37.5 g ai/ha, respectively (Table 5.20). The results showed cyclic phosphonates IVE-2, IVE-7, IVE-9, and IVE-11 stiU exhibited significant post-emergence herbicidal activity against all... 

Furthermore, the variety of also affected herbicidal activity obviously. Comparing IVE-11, IVE-12, and IVE-13 in which 2,4-Cl2 as Y were kept the same, IVE-11 with Me as R exhibited the best herbicidal activity among IVE-11, IVE-12, and IVE-13. When Me as R was replaced by f-Pr or n-Bu, the herbicidal activity against common amaranth and white eclipta decreased obviously at 150 and 37.5 g ai/ha, respectively. IVE-11 had good herbicidal effect against common... 

Further bioassays were carried out in the greenhouse to confirm the postemergence herbicidal activity of IVF. AU of the compoimds IVF were applied at 150 g ai/ha to evaluate their post-emergence herbicidal activity against chingma abutilon, leaf mustard, common amaranth, and white eclipta. The results are listed in Table 5.23. 

The enantiomers of these lA including their racemate were evaluated for their herbicidal activity at different rates in the greenhouse. They were tested for preemergence and post-emergence herbicidal activity against chingma abutilon (Abutilon theophrasti), common amaranth Amaranthm retroflexus), China ixeris (Ixeris chinensis), leaf mustard (Brassica juncea), and white eclipta (Eclipta prostrate) at different rates. In this bioassay, clacyfos (HW02, IC-22) was used as a positive control. The results are summarized in Tables 6.9, 6.10 and 6.11. 

Main weeds in maize field purslane, common amaranth, Asian copperleaf, white eclipta DAT is day after treatment. Weed numbers were counted at 30 DAT and weed plants were cut from ground level and immediately weighed at 30 DAT at different rate as percentage change compared to that of the untreated control. Each treatment had four replications, values are the average of four replicates... 

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