There are two generations per annum in the UK. Larval development has five instar stages. The pest overwinters as a second or third instar larva in a silken hibernaculum in crevices in the bark etc. There is often considerable winter mortality which is …
The summer fruit tortrix moth is an important secondary pest of apple and pear. It attacks foliage and fruit. Natural enemies reduce populations in the unsprayed …
Recorded from over 70 species of plant, mainly from the family Rosaceae, including many hedgerow and woodland trees and shrubs. …
Apple varieties with fruits that are short stalked and/or which hang in clusters, tend to be most susceptible. Bramley and Discovery are highly …
Not a native of Britain. First recorded at Teynham in Kent in 1950, for many years it was confined to the South East, especially Kent and Essex. More recently it has spread across much of southern and central England where it is now widespread and common. …
Damage to foliage is unimportant. Damage to fruits occurs at three different times during fruit development: Overwintered larvae Feeding cavities in the receptacle of flowers and young fruitlets later heal to form corky scars characteristic of early …
to engage in and conduct agricultural research, and for that purpose to plan and carry out experiments and trials for the investigation and solution of farming problems and for the adaptation of the results of scientific research generally to the needs …
Adult (resting) Length 8-11 mm, light brown with darker brown markings. Egg Flat, oval, light green. Black centre when mature. Laid in scale-like batches on leaves and, for the second generation, sometimes on fruits. Larvae Up to 18-20 mm long. …
Pheromone traps The flight activity of male moths should be monitored using sex pheromone traps. The delta design is used widely. Traps should be set out in orchards shortly after blossom. Each orchard should be individually monitored with a trap. The …
Bacillis thurigiensis A programme of weekly sprays of Bacillus thuringiensis (Bt) throughout the egg hatch period gives fairly good control, though control may not be as good as that achieved with conventional or Insect Growth Regulator insecticides (see …
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