Herbicidal Activity of IIJ

As a preliminary bioassay, all of /-butylaminium 0-methyl 1-(substituted phen-oxyacetoxy)alkylphosphonates lU were tested for herbicidal activity on barnyard grass and cabbage type rape with the Petri dish method. The results are listed in Table 3.35. 

The aminium salts IIJ in Table 3.36 displayed higher post-emergence herbicidal activity against dicotyledonous weeds than monocotyledon at 150 g ai/ha in the greenhouse. Most of the aminium salt IIJ displayed herbicidal activity against 

Crop safety of aminium salts IU-11 and nj-24 for rice (Oryza sativa), maize (Zea mays), cotton (Gossypium hirsutum), soybean (Glycine max), wheat (Triticun aestivum), and rape (Brassica campestris) was examined (Table 3.38). Both IU-11 and lU-24 were unsafe to rice, cotton and rape, but they showed good selectivity 

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

Ory rice Zea maize Gos cotton Gly soybean Tri wheat Bra rape 

---

Table 3.37 Structure and post-emergence herbicidal activity of IIJ-11 and IIJ-24 ...

---