A knowledge of the main pests and diseases of apple How to recognise them and assess them Their life cycles and the driving forces behind infestation or infection Varietal susceptibility Alternative hosts Natural enemies Cultural, biotechnological, …
Follow the action calendar below through the season: Assess the levels and risks of pest and disease by regular orchard inspection. Use traps and forecasting models based on weather and orchard data as set out in the action calendar. If control of a pest …
Life cycle Pest status Other hosts Varietal susceptibility Distribution Natural enemies Monitoring Damage Chemical control Biological control Cultural control Biotechnological control Recognition Further …
Apple rust mite is an important secondary pest of apple. A similar species, the pear rust mite, is an important and frequently damaging pest of pear. Apple rust mite is seldom a problem in orchards where the orchard predatory mite, Typhlodromus pyri , is …
Time/growth stage Check list of Integrated Pest and Disease Management tasks Dormant Period Assess overwintering populations of rust mite behind growing shoot buds, fruit tree red spider mite winter eggs round spurs, aphid and sucker eggs on shoots and …
The orchard predatory mite Typhlodromus pyri Several species of predatory mite in the family Phytoseidae prey on apple rust mite, but Typhlodromus pyri is the species which occurs in selectively sprayed apple orchards and is the key natural enemy of apple …
Adults Minute, 0.16-0.18mm long, wedge-shaped mites, yellowish-brown in colour, with two pairs of legs, each leg terminating in a branched feather-claw. Body annulated and with a distinct dorsal shield bearing a pair of setae on the hind margin. Two forms …
Apple rust mite overwinters as a fertilised winter female (deutogyne) behind vegetative buds between the bud and the stem of the previous seasons extension growth. The overwintering females often occur in clusters of up to 100 or more in the crescent of …
Overwintering populations The number of apple rust mite overwintering behind buds in the previous season’s extension growth should be determined in winter in orchards where a satisfactory and stable balance between the mite and the orchard predatory mite …
Adults and nymphs have needle-like mouthparts which they use to suck the sap from the surface cells of leaves and young developing fruitlets. Three types of damage can be distinguished. Damage to rosette leaves caused at and shortly after bud burst Young …
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