21 March - Prevent egg-laying

Gleditsia pea gall: Apply Gazelle SG or Hallmark WZT (EAMU 2008-2844) as leaves start to emerge to prevent midge egg-laying in buds.

Sticky traps: Yellow traps help to monitor whitefly, aphid (winged), sciarid flies, leafhoppers and flea beetles. On dull days, these traps can also catch thrip. Check traps weekly and count pest numbers for accurate predator introduction and any short-term sprays. Where crops had a problem with thrip last year, install blue traps 20cm above foliage.

Dianthus: Vent tunnels and glasshouses to avoid Alternaria and Fusarium infections. Spray affected foliage with Octave, Prestop, Rovral WG (EAMU 2011-3200), Serenade ASO (EAMUs required), Signum (EAMU 2012-2141), Switch or T34 Biocontrol depending on pathogen.

Aphids: Control pests with contact-acting products such as Aphox, Decis (non-IPM), Pyrethrum 5EC, Savona, SB Plant Invigorator or Spruzit.

Downy mildew: Bravo 500 (outdoors only, EAMU 2011-1130), Dithane 945 (outdoors only, EAMUs required), Karamate Dry Flo Neotec (outdoors only), Pergado Uni (EAMU 2012-1605) or Proplant (EAMU 2012-3100) can be applied as protectants. Focus sprays on buddleia, digitalis, geum, hebe, impatiens, osteospermum, pansy, rose and others. Control using Amistar (EAMU 2009-0443), Fenomenal (EAMU 2013-1990), Fubol Gold WG (EAMU 2013-2288), Invader (outdoors only, EAMU 2012-0109), Paraat (EAMU 2011-2585), Pergado Uni (EAMU 2012-1605), Signum (EAMU 2012-2141), Subdue or Valbon (EAMU 2010-1513).

Adelgids: Attacking Abies, Picea, Pinus, Pseudotsuga, Juniperus and Larix - check stem axils for their fluffy deposits, inside which these small insects hide. Galls each contain a developing nymph. Control using Decis, Dursban WG or Hallmark WZT (EAMU 2008-2944) using a wetting agent (depending on product formulation and instructions) to penetrate the "wool'" Control sooty moulds using Rovral WG (EAMU 2011-3200) or Octave.

Biological control: Start introductions now for whitefly, aphid and thrip. Use mixed aphid predator packs to save time on identification.

White blister: Check alyssum, arabis, aubretia, Erysimum and Hesperis. If seen, spray with Fenomenal (EAMU 2013-1990), Pergado Uni (EAMU 2012-1605), Previcur Energy (EAMU 2013-1845) or Signum (EAMU 2012-2141).

John Adlam, Managing director, Dove Associates


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