Xylachlor
Xylachlor is a selective herbicide, used to preëmergently control annual grasses on cereals, wheat, soy and rice. It is an anilide and a acetanilide. As of 2023 it is considered obsolete, but may still be in use.
It was manufactured by American Cyanamid under the "Combat" trademark, registered in August 1979 and expired in 1986.
Compared to the fellow acetanilides alachlor, acetochlor and metolachlor, xylachlor had the weakest control of pigweed and setaria, though the greatest selectivity. Xylachlor is also less detrimental to sorghum, but this is offset by the need for higher application rates to achieve similar weed control. It controlled annual grasses and some broadleaf weeds, and uis generally less active than pendimethalin.
Xylachlor's safety is not well studied. Prediction software indicates that it may be a class 3 highly toxic compound, mutagen or carcinogen, although other software predictions disagree.
Application
It has been formulated as a 48% w/v emulsifiable concentrate, which was in a 1979 test, applied at 2.0-6.0 kg/Ha of active ingredient, in 400 L/Ha of spray water.| Application Rate | Crops tolerant | Weeds controlled |
| 4 kg/Ha | wheat, pea, rape, kale, radish, cowpea, chickpea, groundnut, soyabeen, cotton, kenaf | bromus sterilis, avena fatua, alopecurus myosuroides, senecio vulgaris, veronica persica, phalaris minor |
| 1 kg/Ha | barley, field bean, carrot, sugar beet, maize, sorghum, tomato | poa annua, poa trivialis, oryza punctata, echinochloa crus-galli, digitaria sanguinalis, amaranthus retroflexus |
| 0.25 kg/Ha | oat, onion, lettuce, sorghum, pigeon pea, sesamum | Holcus lanatus, Eleusine indica, Snowdenia polystachya |
In that table, 'tolerant' means the crop's vigour was reduced by less than 15%, and 'controlled' means the weed's vigour or number was reduced by more than 70%.
Links
Category:HerbicidesCategory:Isopropylamino compounds
Category:Preemergent herbicides