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    Suspended the work of the largest fertilizer plant in Romania

    Suspended the work of the largest fertilizer plant in Romania

    Potato moth is approaching the gardens of Volgograd residents

    Potato moth is approaching the gardens of Volgograd residents

    PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

    PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

    Days of the Lipetsk field will be held in the region on July 7-8

    Days of the Lipetsk field will be held in the region on July 7-8

    Cling film with a secret ingredient will keep perishable foods much longer

    Cling film with a secret ingredient will keep perishable foods much longer

    The expert told how to provide the Kirov region with its potatoes, beets and corn

    The expert told how to provide the Kirov region with its potatoes, beets and corn

    Malaysian farmers start using Mineral’s new robots

    Malaysian farmers start using Mineral’s new robots

    I never expected onions to become the main part of my business

    I never expected onions to become the main part of my business

    Irish retail and processing trade unchanged with good demand for processing material

    Irish retail and processing trade unchanged with good demand for processing material

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      Suspended the work of the largest fertilizer plant in Romania

      Suspended the work of the largest fertilizer plant in Romania

      Potato moth is approaching the gardens of Volgograd residents

      Potato moth is approaching the gardens of Volgograd residents

      PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

      PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

      Days of the Lipetsk field will be held in the region on July 7-8

      Days of the Lipetsk field will be held in the region on July 7-8

      Cling film with a secret ingredient will keep perishable foods much longer

      Cling film with a secret ingredient will keep perishable foods much longer

      The expert told how to provide the Kirov region with its potatoes, beets and corn

      The expert told how to provide the Kirov region with its potatoes, beets and corn

      Malaysian farmers start using Mineral’s new robots

      Malaysian farmers start using Mineral’s new robots

      I never expected onions to become the main part of my business

      I never expected onions to become the main part of my business

      Irish retail and processing trade unchanged with good demand for processing material

      Irish retail and processing trade unchanged with good demand for processing material

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        Suspended the work of the largest fertilizer plant in Romania

        Suspended the work of the largest fertilizer plant in Romania

        Potato moth is approaching the gardens of Volgograd residents

        Potato moth is approaching the gardens of Volgograd residents

        PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

        PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

        Days of the Lipetsk field will be held in the region on July 7-8

        Days of the Lipetsk field will be held in the region on July 7-8

        Cling film with a secret ingredient will keep perishable foods much longer

        Cling film with a secret ingredient will keep perishable foods much longer

        The expert told how to provide the Kirov region with its potatoes, beets and corn

        The expert told how to provide the Kirov region with its potatoes, beets and corn

        Malaysian farmers start using Mineral’s new robots

        Malaysian farmers start using Mineral’s new robots

        I never expected onions to become the main part of my business

        I never expected onions to become the main part of my business

        Irish retail and processing trade unchanged with good demand for processing material

        Irish retail and processing trade unchanged with good demand for processing material

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          Suspended the work of the largest fertilizer plant in Romania

          Suspended the work of the largest fertilizer plant in Romania

          Potato moth is approaching the gardens of Volgograd residents

          Potato moth is approaching the gardens of Volgograd residents

          PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

          PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

          Days of the Lipetsk field will be held in the region on July 7-8

          Days of the Lipetsk field will be held in the region on July 7-8

          Cling film with a secret ingredient will keep perishable foods much longer

          Cling film with a secret ingredient will keep perishable foods much longer

          The expert told how to provide the Kirov region with its potatoes, beets and corn

          The expert told how to provide the Kirov region with its potatoes, beets and corn

          Malaysian farmers start using Mineral’s new robots

          Malaysian farmers start using Mineral’s new robots

          I never expected onions to become the main part of my business

          I never expected onions to become the main part of my business

          Irish retail and processing trade unchanged with good demand for processing material

          Irish retail and processing trade unchanged with good demand for processing material

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            Suspended the work of the largest fertilizer plant in Romania

            Suspended the work of the largest fertilizer plant in Romania

            Potato moth is approaching the gardens of Volgograd residents

            Potato moth is approaching the gardens of Volgograd residents

            PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

            PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

            Days of the Lipetsk field will be held in the region on July 7-8

            Days of the Lipetsk field will be held in the region on July 7-8

            Cling film with a secret ingredient will keep perishable foods much longer

            Cling film with a secret ingredient will keep perishable foods much longer

            The expert told how to provide the Kirov region with its potatoes, beets and corn

            The expert told how to provide the Kirov region with its potatoes, beets and corn

            Malaysian farmers start using Mineral’s new robots

            Malaysian farmers start using Mineral’s new robots

            I never expected onions to become the main part of my business

            I never expected onions to become the main part of my business

            Irish retail and processing trade unchanged with good demand for processing material

            Irish retail and processing trade unchanged with good demand for processing material

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              Suspended the work of the largest fertilizer plant in Romania

              Suspended the work of the largest fertilizer plant in Romania

              Potato moth is approaching the gardens of Volgograd residents

              Potato moth is approaching the gardens of Volgograd residents

              PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

              PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

              Days of the Lipetsk field will be held in the region on July 7-8

              Days of the Lipetsk field will be held in the region on July 7-8

              Cling film with a secret ingredient will keep perishable foods much longer

              Cling film with a secret ingredient will keep perishable foods much longer

              The expert told how to provide the Kirov region with its potatoes, beets and corn

              The expert told how to provide the Kirov region with its potatoes, beets and corn

              Malaysian farmers start using Mineral’s new robots

              Malaysian farmers start using Mineral’s new robots

              I never expected onions to become the main part of my business

              I never expected onions to become the main part of my business

              Irish retail and processing trade unchanged with good demand for processing material

              Irish retail and processing trade unchanged with good demand for processing material

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                Suspended the work of the largest fertilizer plant in Romania

                Suspended the work of the largest fertilizer plant in Romania

                Potato moth is approaching the gardens of Volgograd residents

                Potato moth is approaching the gardens of Volgograd residents

                PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                Days of the Lipetsk field will be held in the region on July 7-8

                Days of the Lipetsk field will be held in the region on July 7-8

                Cling film with a secret ingredient will keep perishable foods much longer

                Cling film with a secret ingredient will keep perishable foods much longer

                The expert told how to provide the Kirov region with its potatoes, beets and corn

                The expert told how to provide the Kirov region with its potatoes, beets and corn

                Malaysian farmers start using Mineral’s new robots

                Malaysian farmers start using Mineral’s new robots

                I never expected onions to become the main part of my business

                I never expected onions to become the main part of my business

                Irish retail and processing trade unchanged with good demand for processing material

                Irish retail and processing trade unchanged with good demand for processing material

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                  Suspended the work of the largest fertilizer plant in Romania

                  Suspended the work of the largest fertilizer plant in Romania

                  Potato moth is approaching the gardens of Volgograd residents

                  Potato moth is approaching the gardens of Volgograd residents

                  PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                  PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                  Days of the Lipetsk field will be held in the region on July 7-8

                  Days of the Lipetsk field will be held in the region on July 7-8

                  Cling film with a secret ingredient will keep perishable foods much longer

                  Cling film with a secret ingredient will keep perishable foods much longer

                  The expert told how to provide the Kirov region with its potatoes, beets and corn

                  The expert told how to provide the Kirov region with its potatoes, beets and corn

                  Malaysian farmers start using Mineral’s new robots

                  Malaysian farmers start using Mineral’s new robots

                  I never expected onions to become the main part of my business

                  I never expected onions to become the main part of my business

                  Irish retail and processing trade unchanged with good demand for processing material

                  Irish retail and processing trade unchanged with good demand for processing material

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                    Suspended the work of the largest fertilizer plant in Romania

                    Suspended the work of the largest fertilizer plant in Romania

                    Potato moth is approaching the gardens of Volgograd residents

                    Potato moth is approaching the gardens of Volgograd residents

                    PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                    PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                    Days of the Lipetsk field will be held in the region on July 7-8

                    Days of the Lipetsk field will be held in the region on July 7-8

                    Cling film with a secret ingredient will keep perishable foods much longer

                    Cling film with a secret ingredient will keep perishable foods much longer

                    The expert told how to provide the Kirov region with its potatoes, beets and corn

                    The expert told how to provide the Kirov region with its potatoes, beets and corn

                    Malaysian farmers start using Mineral’s new robots

                    Malaysian farmers start using Mineral’s new robots

                    I never expected onions to become the main part of my business

                    I never expected onions to become the main part of my business

                    Irish retail and processing trade unchanged with good demand for processing material

                    Irish retail and processing trade unchanged with good demand for processing material

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                      Suspended the work of the largest fertilizer plant in Romania

                      Suspended the work of the largest fertilizer plant in Romania

                      Potato moth is approaching the gardens of Volgograd residents

                      Potato moth is approaching the gardens of Volgograd residents

                      PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                      PROVIDE YOURSELF AND THE FARMS OF THE SFO WITH AN ELITE POTATO SEED FUND

                      Days of the Lipetsk field will be held in the region on July 7-8

                      Days of the Lipetsk field will be held in the region on July 7-8

                      Cling film with a secret ingredient will keep perishable foods much longer

                      Cling film with a secret ingredient will keep perishable foods much longer

                      The expert told how to provide the Kirov region with its potatoes, beets and corn

                      The expert told how to provide the Kirov region with its potatoes, beets and corn

                      Malaysian farmers start using Mineral’s new robots

                      Malaysian farmers start using Mineral’s new robots

                      I never expected onions to become the main part of my business

                      I never expected onions to become the main part of my business

                      Irish retail and processing trade unchanged with good demand for processing material

                      Irish retail and processing trade unchanged with good demand for processing material

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                      Knowledge library AHDB: weeds and volunteer control in potatoes

                      December 28, 2021
                      in Weeds, AGRONOMIC ARCHIVE
                      Reading Time: 5 mins read
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                      AHDB: weeds and volunteer control in potatoes
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                      Weeds can reduce the yield and quality of potatoes particularly where crop cover is reduced by weed competition 
                      • Research reports on herbicides, weeds and the control of volunteer potatoes
                      Why weeds cause losses

                      Potatoes are very susceptible to weed interference during two phases of growth

                      • early growth stages due to slow emergence
                      • at the end of the growing season when the canopy opens up

                      Some weeds, notably cleavers and bindweed, can grow though the crop and smother the canopy. Tall weeds such as fat hen, oilseed rape, creeping thistle, sowthistles and many grass weeds can emerge through the canopy, compete for nutrients, light and water and add to the weed seed bank for the future. Even weeds which do not emerge through the canopy can compete with the crop for nutrients if present in sufficient numbers.

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                      Potatoes can be good competitors with weeds once crop canopy expansion begins and are often considered a “cleaning” crop in the rotation.

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                      Weeds as sources of pest and disease problems 

                      Certain stubby root nematodes transmit Tobacco Rattle Virus (TRV) which can result in spraing in potato tubers. TRV has a wide host range, including many arable weed species (e.g. field pansy, knotgrass, groundsel, shepherd’s purse and chickweed) and these can act as a reservoir for TRV infection of potato crops.

                      Managing weeds in potato crops

                      The weeds review commissioned in 2019,  discusses control options in more detail, including non-chemical controls such as mechanical weeding.

                      Herbicides are still the main weed control option used in non-organic systems. The primary method is to use a residual herbicide programme pre-emergence, usually containing a contact herbicide component, followed up by a post-emergence herbicide application where necessary. 

                      Prior to its withdrawal in 2019 diquat was widely used, mixed with a combination of residual herbicides. Linuron had been an important residual but its last year of use was 2018. In response to the loss of these actives, a series of replicated and demonstration trials were carried out on the SPot Farm network between 2016 and 2020 to investigate the effectiveness of new herbicides and spray programmes. 

                      Optimising herbicide efficacy

                      To make the best of herbicide products stick to label recommendations. Generally residual herbicide efficacy is aided by application to damp rather than dry soil Care should be taken to ensure sprayers are set-up appropriately and herbicides applied near to the soil surface at slow speeds

                      • review of weed control options and future opportunities for UK crops
                      Volunteer potatoes

                      Also known as groundkeepers, these are plants which develop from unharvested tubers (or tuber pieces). Plants may also develop from true potato seed, with certain varieties particularly prone to producing viable true seed, but these are smaller and less vigorous than those arising from tubers.

                      Volunteer potatoes as sources of pest and disease problems 

                      Volunteers are a problem because they can be a reservoir of potato pest and disease problems such as PCN, aphid-transmitted viruses and late blight. There are tolerances for volunteer potatoes in seed potato production and numbers above the threshold can result in the crop being downgraded at inspection.

                      Volunteers are also an issue for non-potato crops, for example carrots and onions, where they are effectively weeds which can outcompete the actual crop. Potato volunteers can produce pea sized berries and if these are present in the harvested pea crop they result in crop rejection.

                      Research projects have looked for novel solutions for volunteer control in horticultural crops and at the use of maleic hydrazide (MH). This is applied to the growing potato crop as a foliar spray and acts as a sprout suppressant and so provides control of volunteers.

                      dsc6625
                      Managing volunteer potatoes

                      An integrated approach, across the rotation, will be the most effective route to manage volunteers. Factors to consider are

                      • application of MH to the potato crop
                      • desiccation and effective stolon detachment at harvest
                      • harvester set-up (settings and web sizes) to avoid cutting tubers and to minimize the number of small tubers or tubers pieces that are returned to the field
                      • if possible, avoid cultivation practices following potato crops that result in tubers being buried in the topsoil at depths where they are protected from hard frosts
                      • herbicide use in the following crop and/or pre-harvest of other crops, although no herbicides used to control volunteer potatoes will provide 100% kill
                      ADHB
                      Weeds and volunteer control in potatoes
                      Resources
                      • Read results from the SPot farm trials
                      • Weed Resistance Action Group (WRAG)
                      • Encyclopaedia of arable weeds
                      • Distribution of volunteer potatoes

                      /agronomic-archive

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                      Tags: crop rotationpotato plantingsoil managementweed controlweeds
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