Chafer Larvae In Your Lawn
I am looking to lay a new lawn but have found that the ground is infested with chaffer larvae.I have managed to remove most of these bugs, but I am sure some still remain in the soil.How will this affect laying a new lawn on top of these bugs,providing,of course that I can still lay the lawn?
With regard to your question on chafer larvae in your lawn,they are usually found in rough grazing or cereal crops and in new gardens, and turning over the soil exposes them to the birds. There is now a biological control which uses a parasitic nematode called Heterorhabditis Megidis. It is applied to moist soil from late July to September when the soil temperature is above 12C / 50 deg F.The Nematodes invade the grubs over a period of 4 to 6 weeks and introduce a bacteria which causes them to shrink and die.They are supplied under the trade name Nemasys Chafer Grub Killer and can be ordered by mail or online at any time,but will be delivered at the best time for use in August and early September.(Nematodes are also effective against Leatherjackets).
A ground acting insecticide like HCH* used with root crops should also be effective. HCH is short for hexachlorocyclohexane,an insecticide in the group of chemicals called Organochlorines.There are a number of isomers (where the molecule has different reflections of the formula C6H6Cl6). A mixture which is 99% gamma-HCH is known as Lindane. There are concerns over the safety of Lindane and most of the other pesticides in this group have been withdrawn from use (DDT, Aldrin, Dieldrin).Murphy Gamma BHC Dust contains Lindane.
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