WO2007134388A1 - Treatment of edible crops - Google Patents

Treatment of edible crops Download PDF

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Publication number
WO2007134388A1
WO2007134388A1 PCT/AU2007/000694 AU2007000694W WO2007134388A1 WO 2007134388 A1 WO2007134388 A1 WO 2007134388A1 AU 2007000694 W AU2007000694 W AU 2007000694W WO 2007134388 A1 WO2007134388 A1 WO 2007134388A1
Authority
WO
WIPO (PCT)
Prior art keywords
crops
growing
pathogen
chlorine
bcdmh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2007/000694
Other languages
French (fr)
Inventor
William Bliss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WOBELEA Pty Ltd
Original Assignee
WOBELEA Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US12/301,079 priority Critical patent/US20090105323A1/en
Priority claimed from AU2006902660A external-priority patent/AU2006902660A0/en
Application filed by WOBELEA Pty Ltd filed Critical WOBELEA Pty Ltd
Priority to EP07718940A priority patent/EP2023726A4/en
Priority to NZ573588A priority patent/NZ573588A/en
Priority to AU2007252299A priority patent/AU2007252299B2/en
Publication of WO2007134388A1 publication Critical patent/WO2007134388A1/en
Anticipated expiration legal-status Critical
Priority to US13/465,083 priority patent/US9018239B2/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/16—Control of watering
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • 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
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/50—1,3-Diazoles; Hydrogenated 1,3-diazoles
    • 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

Definitions

  • This invention relates to the treatment of edible crops and, in particular, to pre- harvest treatment of such crops.
  • a very large proportion of edibfe crops are irrigated by overhead sprays. Crops grown in proximity of urban areas may utilize potable mains water for this use. However due to the expansion. of urban population traditional vegetable growing areas are being displaced to areas where irrigation supplies are dependant on dams or rivers.
  • Total Plate Count (TPC) of this water will give a typical figure of 10 6 of Colony Forming Units CFU/ml indicating a high level of contamination.
  • faecal contamination will show cofiform counts of 10 1 - 10 3 / ml.
  • MRL Maximum Residue Level
  • the object of the present invention is to provide a means whereby edible crops can be treated for the removal of human and plant pathogens from their surfaces prior to harvest with a lesser withholding period than has presently been the case so treatment can occur much later than is the case using pesticides.
  • the invention includes In the growing of crops for consumption, the removal of pathogens by the addition to irrigation water for the crops of an anti-pathogen compound and supplying this to the crop prior to harvest whilst normal irrigation is effected.
  • the anti-pathogen material be based on halogens such as chlorine, bromine and iodine or mixtures of halogens or halogens combined with other organic radicals including cyanurate, hydantoin, peroxide and chlorine dioxide.
  • a sensing probe such as ORP.
  • the anti-pathogen material be BCDMH or TlCA, and it is also preferred to make a concentrate of this product with a solvent, which concentrate can be metered into the irrigation water;
  • a solvent which concentrate can be metered into the irrigation water;
  • Di Acetone Alcohol or other high-molecular weight solvent we may also use a Silica Drier if this is required.
  • a treatment process which may include dipping or spraying with a a ⁇ ti-pathoge ⁇ material, such as, BCDMH (Bromo Chloro Di Methyl Hydantoin) or TICA (Trichloro lso Cyanuric Acid).
  • BCDMH Binary Chloro Di Methyl Hydantoin
  • TICA Terichloro lso Cyanuric Acid
  • BCDMH is currently registered in Australia and New Zealand for the control of plant and human pathogens on fruit and vegetables by washing, dipping or spraying as a post harvest treatment
  • the withholding period in this use pattern is 15 minutes, when BCDMH is used at 5 - 22.5 PPM as chlorine.
  • Current f ieldwork indicates that a few "troublesome" crops may require higher rates of 50 - 100 PPM as chlorine, which could extend the withholding period to 60 minutes.
  • the preharvest irrigation water containing BCDMH would reduce the pathogen level on all wetted surfaces of the crop.
  • the formulation described in this invention allows the product to be used in water or in mineral oil as for misting bananas.
  • Other vegetable oils eg. Canola are used with pesticides.
  • Another development is synthetic oils or materials such as polysilicones.
  • the formulation is designed for addition to such systems.
  • the solvent may be any other high molecular weight solvent, such as Glycol Alcohols or Glycol Ethers, the basic requirement be that the solvent, or any residue which. it leaves, is non-toxic.
  • the BCDMH can be replaced by TICA or other suitable anti-pathogen compound.
  • the concentrate may, if required, be diluted with a compatible minerai, plant or animal oil prior to use, or the concentrate is miscible with water in all proportions. In an emulsion this will permit the disinfectant to be present in either oil or water phase or both.
  • the concentrate may be mixed with the irrigation water used for a number of • different types of irrigation.
  • the product When the product is to be used to control soil borne plant pathogens, it can readily be applied by flood, furrow, overhead or trickle irrigation systems.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Water Supply & Treatment (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Forests & Forestry (AREA)
  • Botany (AREA)
  • Ecology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

In the growing of crops for consumption, the removal of pathogens by the addition to irrigation water for the crops of an anti-pathogen compound and supplying this to the crop prior to harvest whilst normal irrigation is effected. The anti-pathogen material is based on halogens such as chlorine, bromine and iodine or mixtures of halogens or halogens combined with otherorganic radicals including cyanurate, hydantoin, peroxide and chlorine dioxide. BCDMH and TICA are preferred anti-pathogen and they may be added to a carrier concentrate and measured and dosed into the irrigation water.

Description

TREATMENT OF EDIBLE CROPS
Technical Area
This invention relates to the treatment of edible crops and, in particular, to pre- harvest treatment of such crops.
Background to the Invention
A very large proportion of edibfe crops are irrigated by overhead sprays. Crops grown in proximity of urban areas may utilize potable mains water for this use. However due to the expansion. of urban population traditional vegetable growing areas are being displaced to areas where irrigation supplies are dependant on dams or rivers.
Surface water as above is contaminated by livestock, poultry and misdirected sewage effluent.
This contamination results in a growth of undesirable human pathogens in the water supply.
The trend to recycle drainage water and run off from the growing area to conserve water, results in increasing the level of plant pathogens in the irrigation supply.
Total Plate Count (TPC) of this water will give a typical figure of 106 of Colony Forming Units CFU/ml indicating a high level of contamination. In addition faecal contamination will show cofiform counts of 101- 103/ ml.
In developed countries the general requirements for ready to eat foods is for a TPC of 103 /gm or less and nil coliforms. Quite obviously the contaminated irrigation water is not helping achieve the food safety requirement. A further issue in terms of food safety is pesticide residues. As most vegetable crops require generous watering this increases the humidity adjacent the crop and, in turn, results in prime conditions for fungal diseases.
Many of these diseases develop very rapidly and a whole crop can be wiped out in a few days.
While a pesticide spray would control the fungal problem it may leave a residue on the crop at harvest.
The residue, at the time of harvest, cannot exceed the Maximum Residue Level (MRL). To avoid exceeding the MRL a time interval is determined between spraying the pesticide and harvest This time is called the Withholding Period.
Consequently, if a fungal problem occurs close to harvest it may not be possible to use any pesticide on the crop because of the withholding period.
Outline of the Invention
The object of the present invention is to provide a means whereby edible crops can be treated for the removal of human and plant pathogens from their surfaces prior to harvest with a lesser withholding period than has presently been the case so treatment can occur much later than is the case using pesticides.
The invention includes In the growing of crops for consumption, the removal of pathogens by the addition to irrigation water for the crops of an anti-pathogen compound and supplying this to the crop prior to harvest whilst normal irrigation is effected. It is preferred that the anti-pathogen material be based on halogens such as chlorine, bromine and iodine or mixtures of halogens or halogens combined with other organic radicals including cyanurate, hydantoin, peroxide and chlorine dioxide. In addition it is required that the active ingredient be measured and dosed with a sensing probe such as ORP.
It is preferred that the anti-pathogen material be BCDMH or TlCA, and it is also preferred to make a concentrate of this product with a solvent, which concentrate can be metered into the irrigation water; In one particular form of the invention we use Di Acetone Alcohol or other high-molecular weight solvent and we may also use a Silica Drier if this is required.
Description of an Embodiment of the Invention
In order that the invention may be more readily understood, we shall describe one particular form of the invention.
It is often necessary to remove human and plant pathogens from the surface of edible crops and in many applications the crops, after harvest, go through a treatment process which may include dipping or spraying with a aπti-pathogeπ material, such as, BCDMH (Bromo Chloro Di Methyl Hydantoin) or TICA (Trichloro lso Cyanuric Acid). This means that the crops, after harvest, and still carrying substantial quantities of pathogens are transported to a treatment site, with the possibility that cross-contamination from the untreated crops can occur.
BCDMH is currently registered in Australia and New Zealand for the control of plant and human pathogens on fruit and vegetables by washing, dipping or spraying as a post harvest treatment
We propose to treat the crop before harvest with these products and this will reduce the quantity of pathogens which are carried with the newly harvested -A- material, which would normally still pass through a post harvest treatment although, in some cases, this may not be necessary.
The withholding period in this use pattern is 15 minutes, when BCDMH is used at 5 - 22.5 PPM as chlorine. Current f ieldwork indicates that a few "troublesome" crops may require higher rates of 50 - 100 PPM as chlorine, which could extend the withholding period to 60 minutes.
These periods are very much shorter than possible from normal pesticides and thus crops can be treated much closer to harvest than has previously been the case.
As described, the preharvest irrigation water containing BCDMH would reduce the pathogen level on all wetted surfaces of the crop.
The formulation described in this invention allows the product to be used in water or in mineral oil as for misting bananas. Other vegetable oils eg. Canola are used with pesticides. Another development is synthetic oils or materials such as polysilicones. The formulation is designed for addition to such systems.
We provide a base concentrate material and in one particular arrangement this may comprise
Di Acetone Alcohol 1 Litre BCDMH 350 grams
Silica Drier 10 gram
Whilst in this particular formulation we use Di Acetone Alcohol, the solvent may be any other high molecular weight solvent, such as Glycol Alcohols or Glycol Ethers, the basic requirement be that the solvent, or any residue which. it leaves, is non-toxic. The BCDMH can be replaced by TICA or other suitable anti-pathogen compound.
The concentrate may, if required, be diluted with a compatible minerai, plant or animal oil prior to use, or the concentrate is miscible with water in all proportions. In an emulsion this will permit the disinfectant to be present in either oil or water phase or both.
The concentrate may be mixed with the irrigation water used for a number of • different types of irrigation.
For example, it is particularly useful for treatment when applied through overhead sprinkler or spray irrigation systems or other forms of spray units. This tends to bring the material into contact with the crop from above, so there is good coverage of the crop.
When the product is to be used to control soil borne plant pathogens, it can readily be applied by flood, furrow, overhead or trickle irrigation systems.
Where it is to be used on the surface of crops, it can also be applied by land- based spray or misting equipment or be delivered by rotary or fixed wing aircraft.
Whilst the concept of the invention appears to be deceptively simple, it provides a completely new direction of human and plant pathogen control.
Whilst in this specification we have described one particular formulation, it is to be understood by person skilled in the art, that wide variations could be made in this to give the required end result.

Claims

The claims defining the invention are as follows:
1. In the growing of crops for consumption, the removal of pathogens by the addition to irrigation water for the crops of an anti-pathogen compound and supplying this to the crop prior to harvest whilst normal irrigation is effected.
2. In the growing of crops as claimed in claimi wherein the anti-pathogen material is based on halogens such as chlorine, bromine and iodine or mixtures of halogens or halogens combined with other organic radicals including cyanurate, hydaπtoin, peroxide and chlorine dioxide.
3. In the growing of crops as claimed 2 wherein the active ingredient be measured and dosed with a sensing probe such as ORP.
4. .In the growing of crops as claimed in claim 2 or claim 3 wherein the anti- pathogen material is BCDMH.
5. In the. growing of crops as claimed in claim 4 wherein the BCDMH is used as 5 to 100 PPM as chlorine.
6. In the growing of crops as claimed in claim 4 wherein the BCDMH is used as 5 to 22.5 PPM as chlorine and the withholding period is 15 minutes.
7. In the growing of crops as claimed in claim 4 wherein the BCDMH is used as 50 to 100 PPM as chlorine and the holding period is 60 minutes.
,
8. In the growing of crops as claimed in claim 2 or claim 3 wherein the anti- pathogen material is TICA.
9. In the growing of crops as claimed in any one of claims 4 to 8 wherein there is used a concentrate of the anti-pathogen with a solvent, which concentrate can be metered into the irrigation water.
10. In the growing of crops as claimed in claim 5 wherein the solvent is a high-molecular weight solvent.
11. In the growing of crops as claimed in claim 6 wherein the solvent is Di Acetone Alcohol.
12. In the growing of crops as claimed in any one of claims 5 to 7 wherein the concentrate also includes a silica drier.
13. In the growing of crops as claimed in any preceding claim wherein the treated crop is also given a post harvest treatment.
14. In the growing of crops a treatment as described herein with reference to the examples.
PCT/AU2007/000694 2006-05-18 2007-05-18 Treatment of edible crops Ceased WO2007134388A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US12/301,079 US20090105323A1 (en) 2006-05-18 2006-05-18 Treatment of edible crops
EP07718940A EP2023726A4 (en) 2006-05-18 2007-05-18 Treatment of edible crops
NZ573588A NZ573588A (en) 2006-05-18 2007-05-18 Treatment of edible crops using bcdmh
AU2007252299A AU2007252299B2 (en) 2006-05-18 2007-05-18 Treatment of edible crops
US13/465,083 US9018239B2 (en) 2006-05-18 2012-05-07 Treatment of edible crops

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2006902660A AU2006902660A0 (en) 2006-05-18 Treatment of edible crops
AU2006902660 2006-05-18

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US12301079 A-371-Of-International 2007-05-18
US13/465,083 Continuation-In-Part US9018239B2 (en) 2006-05-18 2012-05-07 Treatment of edible crops

Publications (1)

Publication Number Publication Date
WO2007134388A1 true WO2007134388A1 (en) 2007-11-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2007/000694 Ceased WO2007134388A1 (en) 2006-05-18 2007-05-18 Treatment of edible crops

Country Status (5)

Country Link
US (1) US20090105323A1 (en)
EP (1) EP2023726A4 (en)
AU (1) AU2007252299B2 (en)
NZ (1) NZ573588A (en)
WO (1) WO2007134388A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2359265A1 (en) * 2008-01-29 2011-05-19 Pedro Perez Ojeda Procedure and installation of irrigation and preparation of the ground for crops. (Machine-translation by Google Translate, not legally binding)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8563046B2 (en) * 2007-08-23 2013-10-22 Dharma IP, LLC Compositions, systems, and/or methods involving chlorine dioxide (“ClO2”)
US9073754B2 (en) * 2008-05-30 2015-07-07 Dharma IP, LLC Systems, methods, and compositions involving chlorine dioxide and zeolite
MX2013004440A (en) * 2010-10-20 2013-12-16 Dharma Ip Llc Systems, devices, and/or methods for managing crops.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1600289A (en) 1978-05-31 1981-10-14 Fisons Ltd Sterilisation of water for nutrient film systems
US5130325A (en) 1986-10-31 1992-07-14 Great Lakes Chemical Corporation Method for controlling plant disease and microorganisms by incorporation of N-halohydantoin into nutrient-watering supplies
US5697187A (en) * 1995-12-13 1997-12-16 Oxlon, Inc. Method for treatment of crops by an irrigation solution
US6295759B1 (en) * 1998-08-26 2001-10-02 Solvay (Societe Anonyme) Process for hydroponic cultivation of plants
WO2004073408A1 (en) 2003-02-21 2004-09-02 Wobelea Pty. Limited Process to sanitize fruit and vegetables
JP2005060296A (en) * 2003-08-12 2005-03-10 Ccs Kk Method and apparatus for sterilizing soil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1571128B1 (en) * 2004-03-05 2012-09-26 BK Giulini GmbH Use of a mixture for treating water circulation systems in the paper industry

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1600289A (en) 1978-05-31 1981-10-14 Fisons Ltd Sterilisation of water for nutrient film systems
US5130325A (en) 1986-10-31 1992-07-14 Great Lakes Chemical Corporation Method for controlling plant disease and microorganisms by incorporation of N-halohydantoin into nutrient-watering supplies
US5697187A (en) * 1995-12-13 1997-12-16 Oxlon, Inc. Method for treatment of crops by an irrigation solution
US6295759B1 (en) * 1998-08-26 2001-10-02 Solvay (Societe Anonyme) Process for hydroponic cultivation of plants
WO2004073408A1 (en) 2003-02-21 2004-09-02 Wobelea Pty. Limited Process to sanitize fruit and vegetables
JP2005060296A (en) * 2003-08-12 2005-03-10 Ccs Kk Method and apparatus for sterilizing soil

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 200522, Derwent World Patents Index; Class P13, AN 2005-206094, XP008093152 *
DATNIOFF ET AL.: "Efficacy of Chlorine for Decontaminating Water Infested with Resting Spores of Plasmodiophora brassicae", vol. 71, AMERICAN PHYTOPATHOLOGICAL SOCIETY JOURNAL
See also references of EP2023726A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2359265A1 (en) * 2008-01-29 2011-05-19 Pedro Perez Ojeda Procedure and installation of irrigation and preparation of the ground for crops. (Machine-translation by Google Translate, not legally binding)

Also Published As

Publication number Publication date
NZ573588A (en) 2012-08-31
AU2007252299B2 (en) 2013-03-21
US20090105323A1 (en) 2009-04-23
AU2007252299A1 (en) 2007-11-29
EP2023726A1 (en) 2009-02-18
EP2023726A4 (en) 2011-10-05

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