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Control of Hornwort Ceratophyllum demersum B E Manson
Endothal as an Aquatic Herbicide G W Woon and G W Mason
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acre activity adult Agriculture aphid appear application areas assessment atrazine barley grass Canterbury carried caused cereal chemical clover compared cost counts crop damage Department diazinon DISCUSSION early economic effect emergence established experiments farm farmers feed fensulfothion field formulations further gave give given grain granules grass grub grazing growth harvest herbicides important included increase indicated infestation insecticide larvae less lines lucerne materials means measures method mixture months North observed obtained occur P.O. Box paraquat parathion pasture period Pest Control plants plots population porina possible present problem Proc production rates recorded reduced reported Research residual response ryegrass samples season seed showed shown significant soil sowing species spraying spring stage standard Summary Table tested tion tolerance treated treatment trials variety weed control weeks weight yield Zealand