19 September - Weevils and aphids

Vine weevil Start nematode drench applications. Focus on crops without compost-based controls.

Leatherjackets Control using nematode drenches. Outdoor crops can also be treated with Dursban WG drenches or an application of Decoy Wetex pellets (end use date 19 September 2015). Most affected are 9cm and smaller pots and plants growing on sand beds.

Weeds Fine, moist soils enable herbicide applications. Tank-mix Chikara and glyphosate to control scrub and woody weeds on non-crop areas. Direct soil applications of Chikara using a hooded sprayer can be made to selected Aesculus, Betula, Buddleja, Buxus, catalpa, Chamaecyparis, Corylus, cotoneaster, forsythia, Platanus, Populus, Prunus laurocerasus, Rosa rugosa, Thuja, Tilia and weigela but not to Cornus alba, Ligustrum or Syringa spp. Contact-acting active ingredients include glufosinate-ammonium, carfentrazone-ethyl (EAMUs required) or diquat, which will knock back small annual weeds on non-crop areas.

Root aphid Control in ornamental Ribes and pines outdoors with drenches of Dursban WG. Under protection, Intercept 70WG can be used but only in specific situations. Keep compost moist for products to work effectively for longer.

Cultural work Ensure vulnerable crops and autumn potting are allocated space in tunnels and glasshouses. Check fleece and Cosytex for holes and order new supplies if required. Allocate space for hydrangeas on outside beds for flower bud initiation. Replace damaged tunnel sheets while air temperatures are still warm enough.

Flea beetles Affecting Crambe, Erysimum, fuchsia and others. Control using Calypso (EAMUs required), Decis, Hallmark WZT (EAMU 2008-2944), Pyrethrum 5EC, Spruzit or Toppel 100 (EAMU 2013-2410). Sticky traps also work.

Rust Control using Amistar (EAMU 2009-0443), Bumper 250EC (EAMU 2014-1274), products containing copper oxychloride, Difcor 250EC (EAMU 2014-1023), Folicur, Lyric (until 12/10/2014), Plover (EAMU 2005-0159), Signum (EAMU 2012-2141) or Systhane 20EW.

Stem cankers Avoid lifting vulnerable trees in leaf. Apply Synthron EDTA Cu 9.1 per cent two weeks before lifting. Use a transport system that keeps stem damage to a minimum to reduce infection risks. Store crops that have most problems under cover this winter.

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