During the past few days some bedding plants, which were still in
shallow seed trays in the greenhouse, suddenly withered and died. On
inspection of their roots I found a white maggot type creature in the
compost. In another tray I found many chestnut brown cocoons/pupa
amongst the compost. This was compost I purchased from a garden centre
(Arthur Bowers) Does anyone know what these pests are and where they
probably came from?
Thanks

In article 472c70f8-3d1f-419c-ae30-
, says...
During the past few days some bedding plants, which were still in
shallow seed trays in the greenhouse, suddenly withered and died. On
inspection of their roots I found a white maggot type creature in the
compost. In another tray I found many chestnut brown cocoons/pupa
amongst the compost. This was compost I purchased from a garden centre
(Arthur Bowers) Does anyone know what these pests are and where they
probably came from?
Thanks

You dont give a size but it sounds as if they are fungus gnat lava, if
this is the case your compost has been kept too wet.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea