02 Sep 2011
| by John Adlam, Managing director, Dove Associates
Rats: If your nursery is near cereal crops, start to check your rat bait boxes.
Rabbits: Rabbits seem to be quite selective about what they eat, but once they get the taste for our top-quality nursery stock they never look back on boring old dandelions. Damage is identifiable from other pests as it is bitten off at a 45 degs angle, never straight. The most common control involves...
Remember to look back at last month's list of products that will lose approvals over the year end and into the early part of next year. Make sure that your spray programme has the products being phased out deleted and suitable replacements incorporated. Further information can be found at www.pesticides.gov.uk...
Shot hole: Apply the second Cyprokylt spray on cherries to gain overwintering control of bacterial shot hole and potential canker infections. Spray in mid-October or at least once more before leaf drop. The copper products do not stick too well to the leaf so they can be easily washed off after application...
Lupins : Remember to keep on top of Lupin anthracnose (Colletotrichum). Leaf spots , which can have orange-coloured spores on the surface of the spot and a distinctive spiralling of the stems, characterise this disease. Being seed-borne, it can be carried through most stages of the plant's life. Routine...
Leatherjackets: Get control of newly emerged leatherjackets with Dursban WG drenches or New Draza pellets in smaller pots, 9cm and down, which seem to be the ones most affected. Spannit granules are best used for sand beds. Tortrix caterpillars: Spray with Nemolt if you have a biological control...
Whitefly - With predators, add Majestik, Nemolt, SB Plant Invigorator and Mycotal into your integrated pest management programme. Mycotal is a useful control product especially in humidity levels above 80 per cent under protection. If predators are not used, apply Gazelle, Oberon, Toppel 10, Decis...
Bay sucker ... Small nymphs suck the sap and cause leaf edge roll. If the plants are for immediate sale, spray with a short harvest interval product such as SB Plant Invigorator or Stalwart (SOLA 2006-3285). Otherwise, use Hallmark with Zeon Technology or Decis. Roses Adding a wetting agent with...
Break open a bud and you will see a small, yellowy larva inside the hollow stem; spray Toppel 10, Dursban WG or Gyro. The aim is to control either the adults during egg laying or the young larvae during hatching. Good needle and stem coverage is essential so use high water rates and a wetting agent....