Crop production systems - Potatoes II - Growth, pests and diseases.

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What family are potatoes a member of?
Solanaceae. Tomatoes are the same.
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When are potatoes planted?
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When are potatoes harvested?
September - October (main crop)
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What should dry matter be in a potato?
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What do processors look for in a potato?
Even, bright, clean sample. no bruising or physical defects. No skin or flesh diseases.
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WHat does chitting acheive?
Earlier, more rapid haulm emergence. Earlier tuber formation. Earlier harvest in warmer weather. Improved yield. Ability to manipulate sprout number.
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How many years should be left between a potato crop rotation?
traditionally 1/4 but modern rotations usually 1/6.
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When are potatos planted?
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When are potatos harvested?
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WHat crop would follow potatos?
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Damage caused by weeds;
Competition for light, space, nutrients and water. Interfere with harvest. reduced tuber quality. Increased disease. Blight, host for disease. Potential host for a PCN if weed belongs to solanaceae family.
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Different methods of cultural weed control?
Stubble management - green bridge. Rotations. Autumn cultivations. Chitted seed. Spring cultivations. Inter row harrowing. PLanting date. Planting rate. Mechical weeding.
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What are potatos traditionally known as in a rotation?
the cleaning crop.
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What method of cultural control is appropriate is perennial weeds are present?
Glyphosate application.
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Best timing of applications for potato herbicides?
Pre em applied after planting. (contact and residual)
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Why are volunteer potatos a bad idea?
Potential host for PCN. Potential host of blight. Potential virus and aphid focus. competition for plants. Mixing of varieities.
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How to control volunteer potatoes?
Lift all potatos. Do not plough to establish following crop. Ensure a competitive following crop (wheat).
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How can wireworms damage tubers?
the larvae of click beetles bore holes in the tubers.
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How do you reduce the risk of wireworm?
Ensure a potato crop does not follow grass, grass can harbour wireworm. Nematicides can also be used.
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How much of the UK's arable land is infected with PCN?
60%. Causes growth retaradtion and early senescense.
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How can we control PCN?
Soil /machinery management. Rotations. (1/6) Sensible disposal of waste. Biological control (Mustard) Nematicides.
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How can mustard be used as a biofumigant?
It can be grown, flailed off and rotivated into the soil.
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What is the purpose of nematicides?
Control PCN, FLN, wireworms. can be broadcast of incorporated. Highly toxic.
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How long can potato blight complete its life cycle?
5 days in dieal conditions.
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Why is blight a problem?
Can cause complete cross loss or massive yield reduction. Disease can also develop in stores.
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How much, on average, does blight cost the potato industry each year?
£60 million.
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WHat is a stolon in a potato?
the 'root' like structure that forms between the mother tuber and initiating tuber.
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When are potatoes planted?



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When are potatoes harvested?


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What should dry matter be in a potato?


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What do processors look for in a potato?


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