CN1420725A - Synergistic insect control - Google Patents

Synergistic insect control Download PDF

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Publication number
CN1420725A
CN1420725A CN00818240A CN00818240A CN1420725A CN 1420725 A CN1420725 A CN 1420725A CN 00818240 A CN00818240 A CN 00818240A CN 00818240 A CN00818240 A CN 00818240A CN 1420725 A CN1420725 A CN 1420725A
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insect
genetically modified
virus
recombinant
modified crops
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CN00818240A
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Chinese (zh)
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M·F·特里西
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BASF SE
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BASF SE
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N63/00Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
    • A01N63/40Viruses, e.g. bacteriophages
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology

Abstract

There is provided a method for the synergistic control of insects which comprises applying to the locus of a transgenic crop which produces an insect toxin a synergistically effective amount of a recombinant insect virus containing a vector which is highly virulent to said insect.

Description

Collaborative insect control
By chemical means control insect pest is that a kind of useful protection crops avoid attack of insect and the method for attacking the damage that is caused for a long time always.More recent, introduced the method that specificity is destroyed crop at the control insect of target insect, this method has been avoided and has been used relevant environment and the ecological hazard of conventional pesticides.A kind of use the in these methods can produce the insect specificity toxin, as the genetic modification crop of the Cry toxin of bacillus thuringiensis (Bacillus thuringiensis).Yet the crop of expression bacillus thuringiensis Cry toxin may show defense reaction in various degree to a large amount of lepidoptera pest species.For example, the cotton variety of expressing CryIA (c) is to tobacco budworm, be cigarette aphid noctuid (Heliothis virescens), high resistance is arranged, but the real noctuid of cotton bollworm paddy (Helicoverpa zea) only there are moderate resistance (J.H.Benedict etc., 1996, Journal ofEconomic Entomology, the 89th volume (1), the 230th page).
These class methods of another control insect are applying biological formulation example such as nucleopolyhedrosis virus (NPV) (United States Patent (USP) 4,668,511) or recombinant nuclear polyhedrosis virus (rNPV) (United States Patent (USP) 5,662,897 and United States Patent (USP) 5,858,353).Yet NPV and rNPV be at the virulence/effort levels of various insect species, can be according to the effectiveness of the toxin of the host range of the medicament that carries virus and insertion coded by said gene and different.For example, the real noctuid of insect species paddy is extremely sensitive to NPV and the rNPV of difference called after HzNPV and HzAaIT, but to autographa california (Autographa californica) NPV (AcNPV) or its rNPV, be the only medium susceptibility (Treacy etc. of tool of AcAaIT, 1999, Proceeding Beltwide Cotton Conf., the 1076-1083 page or leaf).Although will contain existing (the All and Treacy of description of combination that the recombinant nuclear polyhedrosis virus that the target insect species is had a carrier of poisoning toxicity is applied to the genetically modified crops strain, 1997, the 1294th page of Proceedings Beltwide Cotton Conf.), but these genetically modified crops and rNPV agent no matter separately still combine all not provide and prevent the required insect control level of crop loss on the commercial size.
Therefore, the purpose of this invention is to provide preventing crop destruction and the useful synergistic insect control method of economic loss that causes thus.
Another object of the present invention provides and strengthens the breaking-up that genetically modified crops defence attack of insect and invasion and attack are caused and the method for destruction.
A feature of the present invention is that the synergistic insect control and the crop protection method that are provided are special at the target insect species, and shows and have enhanced environmental and eco-compatibility, also provides the insect of commercial acceptable level to control and crop protection simultaneously.
From the following description and the appended claims, other purpose of the present invention and feature will be tangible for those skilled in the art.
The invention provides the method for synergistic insect control, comprise the recombinant insect virus that described insect is had supervirulent carrier that contains to genetically modified crops Zoned application cooperative effective quantity.
The present invention also provides the method that strengthens genetically modified crops defence attack of insect and attack the destruction of being caused.
Although the chemical method Pest Control is a kind of effective means of controlling important agricultural insect insect always, has introduced and more had the specific control method of target insect.Comprise that in these insect specificity methods use produces the genetically modified crops of insect toxins such as bacillus thuringiensis (Bt) toxin by hereditary change or uses natural viral such as nucleopolyhedrosis virus (NPV) or reorganization NPV (rNPV).Yet the genetically modified crops that produce the Bt toxin may show more not satisfied defence degree to the target insect.Similarly, the insect viruses of natural and reorganization when using as the independent method of control insect, the common effectiveness that also shows in various degree.
Although the target insect species had to containing being used in combination of the rNPV of moderately toxic carrier and genetically modified crops is existing describes, but, use described rNPV separately or when described rNPV is used with the genetically modified crops of genetically engineered generation insect toxins, do not obtaining gratifying result for commercial insect control.
Find now, give genetically modified crops, the genetically modified crops of preferred genetically engineered generation insect toxins (insecticide), use and contain the recombinant insect virus that the target insect species is had supervirulent carrier, demonstrate significant synergy (that is the insect that, obtained control effect can expect when using the toxicity recombinant insect virus separately or when using genetically modified crops separately insect control effect much higher).This synergy makes it possible to realize by biological means non-chemically the insect control of commercial useful level.And synergistic insect control method of the present invention makes it possible to achieve the effective resistance control that adapts with environment and ecological rational sustainable agriculture practical activity.
According to the inventive method, to the genetically modified crops kind, the genetically modified crops of preferred genetically engineered generation insect toxins, use the recombinant insect virus that the target insect species is had supervirulent carrier that contains of cooperative effective quantity, preferred recombinant nuclear polyhedrosis virus (rNPV) provides the Collaborative Control to insect pest.That is, use combination results that this toxicity recombinant insect virus causes insect composition extremely and kill insect effect (synergy) than what use killing of killing respectively that insect composition institute expectability arrives individually the insect effect is eager to excel to these genetically modified crops.
The recombinant insect virus that is applicable to strong toxicity carrier of containing of the inventive method comprises rNPV such as HzNPV, HzAzIT, EGTdel or their combination.
The genetically modified crops that are applicable to the generation insect toxins of the inventive method comprise corn and cotton strain (BTK system), for example the NuCotn 33B that expresses Bt TM(a kind of Bollgard that passes through TMTransformation event comes from Deltapine DP5415 TMThe transgenic cotton flower variety), or the transgenic corns kind is as expressing MON 810 TMThose of transformation event (YieldGard TM, Monsanto Co.).
In the operation of reality, can be with the form of compositions formulated, for example wettable powder is applied to genetically modified crops with this toxicity recombinant insect virus, especially produces on zone, leaf or the stem of genetically modified crops of insect toxins, on the preferred leaf by hereditary change.Preferred preparation is described on the U.S. Patent Application Serial of submitting on June 9th, 1,998 09/094,279 common co-pending (incorporating this paper into as a reference).
The cooperative effective quantity of toxicity recombinant insect virus can be according to main condition, and for example the density of the insect-resistant degree of genetically modified crops, the selection of time of using, weather condition, mode of administration, insect colony, target crop species, target insect species wait and change.Usually, when with per hectare 1 * 10 10Individual occlusion body (OB/ha) is to 1 * 10 13OB/ha, preferred 5 * 10 10OB/ha to 12 * 10 11When the ratio of OB/ha is used the toxicity recombinant insect virus to genetically modified crops, the insect control that can obtain to work in coordination with.
In order to be beneficial to further understanding of the present invention, provide following examples, be mainly used in and illustrate its more specifically details.Except defined in the claim, should not think thus the present invention is construed as limiting.
In following examples, by Colby method (Colby, S.R., Weeds, 1967 (15), the 20-22 page or leaf) the definite pair of synergy that the approach insecticides make up, promptly, by each kills the result summation of insect composition gained to independent use, the product that deducts these two results then calculates expection (or prediction) result's (percentage of the insect of elimination) of this combination divided by the value after 100.This is described below by arithmetic mode, and wherein two approach combinations add that by component X component Y forms.
If during greater than the expected results that calculates from this formula, promptly there is synergy in the actual observation result.
In the present invention, the insect control percentage (not using external insecticide) that shows with respect to closely-related contrast crop genetically modified crops of the present invention can be expressed as X; The control percentage of recombinant insect virus of the present invention can be expressed as Y when being used to contrast on the crop.Can use the expection control percentage after aforementioned Colby formula calculates virus and genetically modified crops combination.If the observed result (actual control percentage) that is obtained by the combination of using the virus treated genetically modified crops is during greater than the expected results that calculates, then this combination has synergy.
Embodiment 1 estimates the Synergistic insecticidal effect of using the toxicity recombinant insect virus to genetically modified crops
In this estimated, the foliar spray that uses approaching typical case to run at the scene, cotton field spilt the test macro with the plant structure parameter.To (a) with 5 * 10 11OB/ha and 12 * 10 11Wettable powder (WP) preparation that the OB/ha ratio is used HzAaIT also (b) is expressed the cotton variety of bacillus thuringiensis CryIA (c) ' the insect effect of killing of NuCotn 33B ' is estimated, and makes comparisons with the combination of using conventional cotton variety ' DeltapineDP54151 '.
In being housed, 3.8 liters of plastic basin of commercial potting soil go out plant from seed culture.For purpose relatively, conventional Deltapine DP54151 cotton is included.About 1.5 months beginnings were used virus to cotton behind the cotton planting period.In the sealing chamber that the hanging and rotating type water jet is installed, spray plant.This water jet be furnished with three hollow taper nozzles (TX3, Spraying Systems, Wheaton, IL); A nozzle is provided for directly spraying on plant, and two nozzles are contained on the sag pipe of about 45 the side with the sprinkling plant.The bore of regulating this water jet is with by 3.5kg/cm 2Amount send 189 liters/ha; Use compressed air as spraying propeller.The rNPV insecticide of preparation is pressed 3.5L/ha together with taste stimulation agent Coax TM(CCT Corp., Carlsbad CA) are suspended in the dechlorination water together.Sprayed plant 3 times every 7 days.On planar top, arrange potted plant vegetable lamb, repeat four times, and described planar top covers the dark water of 2cm of having an appointment and moves between plant to prevent larva with the design of completely random.Give each identical dosage of handling of two strain plants, from independently taking identical subsample the test.Be set at average every day of about 27 ℃ of minimum temperature in the environmental parameter of research process medium temperature chamber, and average every day, maximum temperature was about 32 ℃.
Spraying about 1 hour infection plant of after date with the real exigua larvae of the paddy of laboratory cultures at every turn.Use little painting brush that larva is placed on the leaf and square of the whole upper part of every strain vegetable lamb.Spray each after date of phase at three times and on every strain plant, place 30 fresh larvas that hatch altogether.Design is artificial mode of placing larva on plant, so as near natural distributed on cotton of the worm's ovum of this pest species and small grub (Farrar and Bradley, 1985, Environ.Entomol.).Use after date 7 days at the 3rd time, by writing down the impaired of every strain plant and not impaired square number, determine the efficient of these processing that cotton is carried out.By variance analysis (ANOVA, SAS Institute, 1989),, determine the significant difference between these processing with regard to of the damage of the real noctuid of paddy to cotton.Many arrangements test by Duncan (Duncan ' s multiple range tests) (DMRT; SAS Institute, 1989), the mean value of differentiating and processing.
Measured by the many arrangements test of Duncan, the mean value before the same letter does not have significant difference (P<0.05; F[df5,18]=16.9); The percentage point data are carried out arcsine transformation to be used for analyzing.
7 days (the 3rd processing of 7DA3T=used back 7 days) estimates impaired and int square number on every strain plant after last using/infection period.The result
In this greenhouse research, infect the real exigua larvae of paddy weekly and cause untreated DP5415 cotton (susceptibility) to be subjected to significantly much bigger destruction, (53.0% and 20.8% impaired square is arranged respectively) than untreated NuCotn 33B (resistance).With 5 * 10 11OB/ha and 12 * 10 11Use HzAaIT on the consumption leaf of OB/ha and significantly reduced the destruction of insect two cotton varieties.When pressing 5 * 10 with HzAaIT 11OB/ha and 12 * 10 11When OB/ha handled, sensitive plant kind DP5415 produced 27.6% and 23.9% average impaired square number respectively.When pressing 5 * 10 with HzAaIT 11OB/ha and 12 * 10 11When OB/ha handled, resistance plant kind NuCotn33B produced 8.8% and 5.0% average impaired square number respectively.Data show is in table 1.
As what can from the data of table 1, see, with insect the destruction of untreated genetically modified crops is compared, with 12 * 10 11The consumption of OB/ha is used toxicity recombinant insect virus (HzAaIT) to genetically modified crops (NuCotn33B) leaf portion makes the destructiveness of insect descend 4.2 times, and compares with untreated susceptibility crop, with 12 * 10 11The consumption of OB/ha is used described toxicity recombinant insect virus to susceptibility crop (DP5415) only makes the destructiveness of insect descend 2.2 times.Therefore, the combined method that the toxicity recombinant insect virus is applied to genetically modified crops makes the destructiveness of insect, and is lower about 2 times than the insect destructiveness of using this toxicity recombinant insect virus separately or use genetically modified crops institute expectability to arrive separately.
Table 1 is by cotton bollworm, cigarette aphid noctuid on the administered recombinant nucleopolyhedrosis virus HzNPV of leaf portion (Egtdel)/DA26-ADK-AaIT (HaZaIT) control routine and the transgenic cotton flower variety
Cotton variety ﹠ leaf is handled The impaired square mean value of % (± SD) 7DA3T The % contrast 2
Observed value Desired value
DP5415
HZAaIT 5×10 11OB/ha 27.6b (±7.5) ????47.9 ????NA
HZAaIT 12×10 11OB/ha 23.9b (±6.8) ????54.9 ????NA
Untreated 53.0b (±9.4) ????NA ????NA
NuCotn?33B
HZAaIT 8.8c ????83.4 * ????79.6
??5×10 11OB/ha ????(±5.6)
??HZAaIT ??12×10 11OB/ha ????5.0c ????(±3.4) ????90.6 * ????82.3
Do not spray ????20.8b ????(±10.4) ????60.8 ????NA
1Many arrangements of pressing Duncan are determined, and the mean value before the same letter does not have significant difference (P<0.05; F[df 5,18]=16.9); The percentage point data are carried out arcsine transformation to be used for analyzing. 2 *Synergy=observed value>desired value

Claims (10)

1. the method for synergistic insect control comprises the recombinant insect virus that described insect is had supervirulent carrier that contains of using zone from cooperative effective quantity to the genetically modified crops that produce insect toxins, leaf or stem.
2. according to the process of claim 1 wherein that described recombinant virus is a recombinant nuclear polyhedrosis virus.
3. according to the method for claim 2, wherein said recombinant virus is HzNPV, HzAIT, EGTdel or their combination.
4. according to the process of claim 1 wherein that described genetically modified crops are crop plants of genetically engineered expression bacillus thuringiensis toxin.
5. according to the method for claim 4, wherein said genetically modified crops are corns.
6. according to the method for claim 4, wherein said genetically modified crops are cottons.
7. according to the method for claim 6, wherein said crop is NuCotn 33B.
8. according to the method for claim 2, the cooperative effective quantity of wherein said recombinant insect virus is 1 * 10 10OB/ha to 1 * 10 13OB/ha.
9. method according to Claim 8, wherein insect is a lepidopterous insects.
10. according to the method for claim 9, wherein insect is the real noctuid of paddy.
CN00818240A 2000-01-07 2000-12-21 Synergistic insect control Pending CN1420725A (en)

Applications Claiming Priority (2)

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US47950000A 2000-01-07 2000-01-07
US09/479,500 2000-01-07

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EP (1) EP1244360A2 (en)
JP (1) JP2003519638A (en)
KR (1) KR20020065923A (en)
CN (1) CN1420725A (en)
AR (1) AR026806A1 (en)
AU (1) AU3727001A (en)
BR (1) BR0016924A (en)
CA (1) CA2396562A1 (en)
CZ (1) CZ20022301A3 (en)
EG (1) EG22209A (en)
HU (1) HUP0203815A2 (en)
IL (1) IL150379A0 (en)
PL (1) PL357639A1 (en)
SK (1) SK9672002A3 (en)
WO (1) WO2001050865A2 (en)

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CN102981001B (en) * 2012-11-22 2014-11-12 中国农业科学院植物保护研究所 Method for evaluating cotton bollworm resistance control effect

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CA2396562A1 (en) 2001-07-19
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WO2001050865A2 (en) 2001-07-19
HUP0203815A2 (en) 2003-04-28
PL357639A1 (en) 2004-07-26
KR20020065923A (en) 2002-08-14
IL150379A0 (en) 2002-12-01
BR0016924A (en) 2002-11-12
AR026806A1 (en) 2003-02-26
EP1244360A2 (en) 2002-10-02
AU3727001A (en) 2001-07-24
JP2003519638A (en) 2003-06-24
CZ20022301A3 (en) 2002-10-16

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