GB2187099A - Treatment of powdery scab in potatoes - Google Patents

Treatment of powdery scab in potatoes Download PDF

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Publication number
GB2187099A
GB2187099A GB08705113A GB8705113A GB2187099A GB 2187099 A GB2187099 A GB 2187099A GB 08705113 A GB08705113 A GB 08705113A GB 8705113 A GB8705113 A GB 8705113A GB 2187099 A GB2187099 A GB 2187099A
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United Kingdom
Prior art keywords
zinc
tubers
fungicide
potatoes
mixture
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Granted
Application number
GB08705113A
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GB2187099B (en
GB8705113D0 (en
Inventor
John Hemmings
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UNIVERSAL CROP PROTECTION LIMI
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UNIVERSAL CROP PROTECTION LIMI
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Priority to GB08705113A priority Critical patent/GB2187099B/en
Publication of GB8705113D0 publication Critical patent/GB8705113D0/en
Publication of GB2187099A publication Critical patent/GB2187099A/en
Application granted granted Critical
Publication of GB2187099B publication Critical patent/GB2187099B/en
Expired legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
    • A01N47/12—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof containing a —O—CO—N< group, or a thio analogue thereof, neither directly attached to a ring nor the nitrogen atom being a member of a heterocyclic ring
    • A01N47/14—Di-thio analogues thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof

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  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

A method for reduction of powdery scab in potatoes, comprises applying to potato seed tubers immediately prior to planting and/or after harvesting, as active material, a zinc containing fungicide or a mixture of a zinc compound and a non-zinc containing fungicide. Preferred active materials are zinc ethylene-1,2-dithiocarbamate or a mixture of zinc oxide and manganese ethylene-1,2-bisdithiocarbamate.

Description

SPECIFICATION Treatment of Powdery Scab in Potatoes The present invention concerns improvements in or relating to treatment of powdery scab in potatoes.
More particularly, the present invention relates to the obtention of a useful reduction in the incidence of powdery scab in potatoes.
Powdery scab (Spongospora subterranea) is a serious disease affecting the quality of tubers sold for seed and also the skin finish of potatoes sold for ware.
Various fungicides have been utilized as a foliar spray for effectively controlling late blight (Phytophthora infestans); however, to date, there has been no material suitable for obtaining a useful reduction in the incidence of powdery scab.
We have now discovered a new treatment which results in the obtention of a useful reduction in the incidence of powdery scab in potatoes. Such discovery is based on research which has shown that when a zinc compound is mixed with a fungicide then a synergistic effect between the two chemicals, in the activity against the disease, is obtained, when such mixture is applied in solid form, suitably as dust, to potato tubers immediately prior to planting and/or after harvesting. Tests have been carried out on non-zinc containing fungicides on their own, as well as utilising zinc oxide on its own; however, such tests have yielded poor results in attempting to reduce the incidence of powdery scab in potatoes. It is also possible to utilise a zinc-containing fungicide in place of the mixture referred to above.
According to the present invention there is provided a method for reducing the incidence of powdery scab in potatoes comprising applying to potato tubers immediately prior to planting and/or after harvesting, as active material, either a zinc containing fungicide or a mixture of a zinc compound and a non-zinc containing fungicide.
The zinc containing fungicide or the mixture of a zinc compound and a non-zinc containing fungicide is applied to potato seed tubers in solid form, suitably as a dust, preferably at a rate of 3-6 Kg, more preferably 4 Kg per tonne of seed tubers.
Whilst any specific fungicide may be utilised, preferably a dithiocarbamate fungicide will be used, suitably the fungicide known as zineb, viz. zinc ethylene-l, 2-dithiocarbamate. Suitable commercial fungicides containing approximately 7980% w/w zineb may be utilised.
In the case of a mixture of a zinc compound and a non-zinc containing fungicide, preferably zinc oxide and a dithiocarbamate fungicide are utilised. A suitable fungicide in this regard is maneb, viz. manganese ethylene-1,2-bis dithiocarbamate. A preferred mixture contains 80% w/w maneb and 2.5% w/wzinc oxide.
The zinc containing fungicide or the mixture of a zinc compound and non-zinc containing fungicide is applied to the seed tubers at the time of planting, suitably utilising automatic potato planters. Preferably, a "sandwich technique" is utilised wherein the hopper, one half full of seed tubers, has sufficient active ingredients applied to treat one full hopper, such material being applied in dust form evenly over the surface of the tubers.
The remaining potatoes are then added and, in order to ensure thorough coverage of the seed tubers, agitation of the potato is effected which, together with the flowability of the active material, will ensure the desired coverage is obtained.
The thus treated tubers are then planted.
In tests that have been carried out on two sets of untreated tubers, and two sets of tubers treated with a mixture of zinc oxide and maneb, the following results were obtained: Untreated Tubers Treated Tubers Percentage Surface Area Percentage Surface Area Affected Affected 8% 1.6% 12.5% 3.3% It will thus be seen that the present invention provides a method of obtaining a reduction in the incidence of powdery scab in potatoes which had heretofore not been possible.
Whilst specific reference has been made to treatment of potato tubers immediately prior to planting it is to be understood that the method of the invention may also be applied to potatoes as a routine treatment after harvesting.
1. A method for obtention of a reduction in the incidence of powdery scab in potatoes, comprising applying to potato seed tubers immediately prior to planting and/or after harvesting, as active material, a zinc containing fungicide or a mixture of a zinc compound and a non-zinc containing fungicide.
2. A method as claimed in claim 1, in which the active material is applied in solid form.
3. A method as claimed in claim 2, in which the active material is applied in the form of a dust.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Treatment of Powdery Scab in Potatoes The present invention concerns improvements in or relating to treatment of powdery scab in potatoes. More particularly, the present invention relates to the obtention of a useful reduction in the incidence of powdery scab in potatoes. Powdery scab (Spongospora subterranea) is a serious disease affecting the quality of tubers sold for seed and also the skin finish of potatoes sold for ware. Various fungicides have been utilized as a foliar spray for effectively controlling late blight (Phytophthora infestans); however, to date, there has been no material suitable for obtaining a useful reduction in the incidence of powdery scab. We have now discovered a new treatment which results in the obtention of a useful reduction in the incidence of powdery scab in potatoes. Such discovery is based on research which has shown that when a zinc compound is mixed with a fungicide then a synergistic effect between the two chemicals, in the activity against the disease, is obtained, when such mixture is applied in solid form, suitably as dust, to potato tubers immediately prior to planting and/or after harvesting. Tests have been carried out on non-zinc containing fungicides on their own, as well as utilising zinc oxide on its own; however, such tests have yielded poor results in attempting to reduce the incidence of powdery scab in potatoes. It is also possible to utilise a zinc-containing fungicide in place of the mixture referred to above. According to the present invention there is provided a method for reducing the incidence of powdery scab in potatoes comprising applying to potato tubers immediately prior to planting and/or after harvesting, as active material, either a zinc containing fungicide or a mixture of a zinc compound and a non-zinc containing fungicide. The zinc containing fungicide or the mixture of a zinc compound and a non-zinc containing fungicide is applied to potato seed tubers in solid form, suitably as a dust, preferably at a rate of 3-6 Kg, more preferably 4 Kg per tonne of seed tubers. Whilst any specific fungicide may be utilised, preferably a dithiocarbamate fungicide will be used, suitably the fungicide known as zineb, viz. zinc ethylene-l, 2-dithiocarbamate. Suitable commercial fungicides containing approximately 7980% w/w zineb may be utilised. In the case of a mixture of a zinc compound and a non-zinc containing fungicide, preferably zinc oxide and a dithiocarbamate fungicide are utilised. A suitable fungicide in this regard is maneb, viz. manganese ethylene-1,2-bis dithiocarbamate. A preferred mixture contains 80% w/w maneb and 2.5% w/wzinc oxide. The zinc containing fungicide or the mixture of a zinc compound and non-zinc containing fungicide is applied to the seed tubers at the time of planting, suitably utilising automatic potato planters. Preferably, a "sandwich technique" is utilised wherein the hopper, one half full of seed tubers, has sufficient active ingredients applied to treat one full hopper, such material being applied in dust form evenly over the surface of the tubers. The remaining potatoes are then added and, in order to ensure thorough coverage of the seed tubers, agitation of the potato is effected which, together with the flowability of the active material, will ensure the desired coverage is obtained. The thus treated tubers are then planted. In tests that have been carried out on two sets of untreated tubers, and two sets of tubers treated with a mixture of zinc oxide and maneb, the following results were obtained: Untreated Tubers Treated Tubers Percentage Surface Area Percentage Surface Area Affected Affected 8% 1.6% 12.5% 3.3% It will thus be seen that the present invention provides a method of obtaining a reduction in the incidence of powdery scab in potatoes which had heretofore not been possible. Whilst specific reference has been made to treatment of potato tubers immediately prior to planting it is to be understood that the method of the invention may also be applied to potatoes as a routine treatment after harvesting. CLAIMS
1. A method for obtention of a reduction in the incidence of powdery scab in potatoes, comprising applying to potato seed tubers immediately prior to planting and/or after harvesting, as active material, a zinc containing fungicide or a mixture of a zinc compound and a non-zinc containing fungicide.
2. A method as claimed in claim 1, in which the active material is applied in solid form.
3. A method as claimed in claim 2, in which the active material is applied in the form of a dust.
4. A method as claimed in any preceding claim, in which the active material is applied at a rate of 3--6 Kg per tonne of seed tubers.
5. A method as claimed in any preceding claim, in which the zinc containing fungicide is a zinc containing dithiocarbamate.
6. A method as claimed in claim 5, in which the zinc containing fungicide is zinc ethylene-1,2dithiocarbamate.
7. A method as claimed in any one of claims 1 to 4, in which the mixture of a zinc compound and a non-zinc containing fungicide comprises a mixture of zinc oxide and a dithiocarbamatefungicide.
8. A method as claimed in claim 7, in which the fungicide is manganese ethylene-1,2bisdithiocarbamate.
9. A method as claimed in claim 8, in which the mixture comprises 80% w/w manganese ethylene-1,2-bisdithiocarbamate and 2.5% w/w zinc oxide.
10. A method as claimed in any preceding claim, in which the active material is applied to the seed tubers in an automatic potato planter, the hopper thereof being one half full of seed tubers and sufficient active material being supplied to treat one full hopper, the remaining seed tubers then being added an agitation of the potatoes, combined with theflowability of the active material, being such as to thoroughly cover the seed tubers.
11. A method for obtention of a reduction of the incidence of a powdery scab in potatoes, as claimed in any preceding claim, substantially as hereinbefore described.
GB08705113A 1987-03-05 1987-03-05 Treatment of powdery scab in potatoes Expired GB2187099B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08705113A GB2187099B (en) 1987-03-05 1987-03-05 Treatment of powdery scab in potatoes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08705113A GB2187099B (en) 1987-03-05 1987-03-05 Treatment of powdery scab in potatoes

Publications (3)

Publication Number Publication Date
GB8705113D0 GB8705113D0 (en) 1987-04-08
GB2187099A true GB2187099A (en) 1987-09-03
GB2187099B GB2187099B (en) 1988-06-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468100A1 (en) * 2010-12-22 2012-06-27 Dow Global Technologies LLC Synergistic combination of a glyphosate compound and thiabendazole
JP2012131770A (en) * 2010-12-22 2012-07-12 Dow Global Technologies Llc Synergistic combination of glyphosate compound and ipbc
JP2012131772A (en) * 2010-12-22 2012-07-12 Dow Global Technologies Llc Synergistic combination of glyphosate and dmits
EP4349171A1 (en) * 2022-10-08 2024-04-10 Insignes Labs Sp. z o.o. A solid form for preparation of an aqueous dispersion, aqueous dispersion, stable suspension concentrate, combined aqueous dispersion, and uses thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
68(1):2193T *
89(7):54565U *
CHEMICAL ABSTRACT NUMBERS 90(1):1544A *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468100A1 (en) * 2010-12-22 2012-06-27 Dow Global Technologies LLC Synergistic combination of a glyphosate compound and thiabendazole
JP2012131770A (en) * 2010-12-22 2012-07-12 Dow Global Technologies Llc Synergistic combination of glyphosate compound and ipbc
JP2012131772A (en) * 2010-12-22 2012-07-12 Dow Global Technologies Llc Synergistic combination of glyphosate and dmits
JP2012140403A (en) * 2010-12-22 2012-07-26 Dow Global Technologies Llc Synergistic combination of glyphosate compound and tbz
EP2468098A3 (en) * 2010-12-22 2013-05-15 Dow Global Technologies LLC Synergistic combination of a glyphosate compound and ipbc
EP4349171A1 (en) * 2022-10-08 2024-04-10 Insignes Labs Sp. z o.o. A solid form for preparation of an aqueous dispersion, aqueous dispersion, stable suspension concentrate, combined aqueous dispersion, and uses thereof
WO2024076250A1 (en) * 2022-10-08 2024-04-11 Insignes Labs Sp. Z O.O. A solid form for preparation of an aqueous dispersion, aqueous dispersion, stable concentrate, combined aqueous dispersion, and uses thereof

Also Published As

Publication number Publication date
GB2187099B (en) 1988-06-22
GB8705113D0 (en) 1987-04-08

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970305