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Chandra Bhan Yadav

Chandra is based at NIAB East Malling in the Genetics, Genomics and Breeding (GGB) Department. He received his MPhil and a PhD degree from the University of Delhi and subsequently undertook post-doctoral research at the National Institute of Plant Genome …

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The WET Centre

It later evolved and developed into a facility that investigated ways of optimising key resources using novel approaches, and to increase precision, yields, fruit quality, and yield/harvest profiling in soft fruit crops. During its seven-year life, The …

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When to assess (Pest and disease assessment)

Assessment should be done at least fortnightly from bud-burst to mid-August. Assessment of scab and mildew should be done on each occasion. Ideally, assessment should be done before a spray round is due to be applied so that decisions about the need for …

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Sample size (Pest and disease assessment)

Ideally, 50 trees should be sampled in each orchard. However, examining such large numbers of trees is time consuming and is unlikely to be economically viable. A minimum of 10 trees, preferably 20, should be assessed per orchard. If trees are small, …

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Where to sample (Pest and disease assessment)

Remember that although a reliable, representative sample is wanted, the object of sampling is to find trouble if it is there. Infestations are often patchy so the ground should be covered as well as possible. Particular attention should be paid to areas …

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How to sample (Pest and disease assessment)

Visual assessment: Examine the blossom trusses, leaves etc. closely or a take a quick look at shoot tips for aphids, aphid damage, caterpillar damage, scab and mildew. Normal eyesight (with spectacles if necessary) is needed and a hand lens (x10 is …

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Home made beating tray (Pest and disease assessment)

Materials: 1 piece of thin plywood or hardboard, 400 x 625 mm for the tray 1 piece of hard or soft wood 30 x 15 x 400 mm to act as a handle 2 m of approximately 6-8 mm square beading to form an edge around the tray Fix the handle to tray, in the same …

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Thresholds (Pest and disease assessment)

If the threshold for a pest or disease is reached appropriate action should be taken. The thresholds given here are simple (i.e. they do not take into account variety or crop or other factors). They are generally conservative to ensure a margin of safety. …

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