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Determining harvest intervals for zero residues

Statutory harvest intervals are designed to ensure that residues in harvested fruit are below the maximum residue level (MRL) and not to ensure that levels are so low that residues cannot be detected and reported. Data on available residue degradation for …

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Zero residues management system (ZRMS)

The aim of a ZRMS is to reduce residue levels to below the limit of detection by avoiding the use of traditional crop protection products during the period of apple development from post-bloom to harvest and use cultural, biological and other …

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Zero residues management

Pest and disease control There are numerous potential pest and disease problems that must be addressed in order to produce marketable fruit.  The features of the zero residue management treatment system are summarised in the table below, starting …

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Starting out with minimal residues production

Try the ZRMS system on a few orchards initially. Choose orchards with a low incidence of pest and disease. Start the system post-harvest in the autumn so that dormant season treatments have been implemented to minimise the pest and disease carry over. …

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Predators (Natural enemies)

Some predators are specialised feeders attacking only one pest or a small group of pests and can respond quickly to increasing pest populations, effectively regulating them. The best example of this is the use of the orchard predatory mite Typhlodromus …

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Predatory mites (Natural enemies)

Many species of predatory mites are found on unsprayed apple trees but, in selectively sprayed orchards, the most common and important species is the orchard predatory mite Typhlodromus pyri . This species has developed strains resistant to …

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Crop characterisation

Niab’s Crop Characterisation (CC) team has expertise in UK-grown agricultural crops, this includes cereals, herbage, pulses and oilseeds. The group use the physical appearance of plants to characterise/identify a variety. These skills are applied in two …

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Artificial refuges (Natural enemies)

Many species of natural enemies in fruit trees seek refuges as a daily sheltering place or an overwintering site. The sites that they seek are often cracks or crevices in the bark, but young fruit trees with smooth bark offer far fewer refuges of this …

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