The Pesticidal combination that contains flufenoxuron and Avermectin with synergistic function
Technical field
The composition pesticide that this invention relates to is to be active ingredient with flufenoxuron and Avermectin, prevents and treats the insect on the agricultural.Be particularly useful for preventing and treating the diamond-back moth and the mite class that produce resistance special efficacy is arranged.
Technical background
Fluorine worm nitrile is a kind of Phenylpyrazole insecticides, and the desinsection wide spectrum based on stomach toxicity, has certain tagging and systemic action to insect concurrently.Changing flufenoxurons to two, is a kind of acyl group ureas Insecticidal and acaricidal agent, the desinsection wide spectrum, and based on stomach toxicity with tag, its mechanism of action is that to suppress insect cuticle chitinous synthetic to insect.To two spotted spider mite, diamond-back moth, cabbage caterpillars etc. have excellent insecticidal activity.
Avermectin is a kind of common environment amenable insecticidal/acaricidal agent.Being a kind of macrolide antibiotics, is actinomycetic extract, has 16 kinds of isomer.The active component that is used as insecticidal/acaricidal agent mainly is Avermectin B1a and Avermectin B1b wherein, and the former is even more important again.On agricultural, Avermectin is control evil mite such as Tetranychus urticae, Tetranychus cinnabarinus etc. and the important kind of insect such as diamond-back moth, liriomyza bryoniae.
Diamond-back moth is a kind of common insect, and the main harm brassicaceous vegetable is often caused crushing disaster.Especially in the zone, south, diamond-back moth is annual takes place.In some serious zone, conventional pesticide composition such as pyrethroid, organic phosphates, carbamates etc., control efficiency is very poor separately.
Mite has another name called two spotted spider mite etc., the various crop that causes harm, especially citrus, cotton, apple etc.Often cause explosive disaster.And generation overlap is serious, and quantity is big, very easily develops immunity to drugs.
Go up the insect that produces resistance for control agricultural, a kind of way is to release the new component that new and existing kind do not have cross resistance.But, the development cost height of new active ingredient, the construction cycle is long, and all produces the speed of resistance forever less than insect.Other method such as crop allocation adjustment, different agricultural chemicals are rotated etc., in the process of practical operation, are difficult to really play obvious effects.
The composition of different cultivars carries out composite, is control resistant insect or the very common way of evil mite.Heterogeneity is carried out composite, according to the effect of practical application, judge certain composite be synergy, add and or antagonism.Compound synergic is well filled a prescription, owing to obviously improved actual control efficiency, reduced the usage amount of agricultural chemicals, thereby delayed the generation of pest resistance to insecticide greatly, and be the important means of integrated control insect.Still nobody reported in the composite and application of flufenoxuron and Avermectin at present.
Summary of the invention
Go up the diamond-back moth that produces resistance in order to prevent and treat agricultural, we have carried out mutual composite synergy research with compositions such as flufenoxuron, Avermectin.It is tested object that the diamond-back moth in field is adopted in test, and compares with the sensitive strain of indoor feeding, and concrete grammar is:
The diamond-back moth test medicine provides former medicine for producer, is mixed with the preparation that needs by research department.Test method is with reference to " the agricultural industry criteria NY/T1154.7-2006 of the People's Republic of China (PRC) ".Resistance examination worm is the pickles chrysalis of picking up from the field, after sprouting wings, select uniformity three age diamondback moth larvae, the culture dish that the diameter of access storing cabbage leaf (black leaf Chinese cabbage, outermost layer blade) is 9 centimetres, every ware connects 30, every processing connects three wares, spray under 50PSI pressure with the PottER spray tower, spray a ware at every turn, 3 milliliters of every ware spraying liquids.General each processing is provided with 6-7 concentration gradient.The culture dish of handling is put into 25 ℃, raises in the 12H/12H illumination box, checks dead borer population, calculates lethality.Non-resistance examination worm is picked up from the research institute insectary, and test method is the same.Blank spray equivalent clear water.Calculate virulence equation and lethal concentration of 50 LC50 with method of least squares, calculate the toxicity index of medicament and the co-toxicity coefficient of using with (CTC value) according to the abundant method of Sun Yun, CTC value greater than 100 be synergistic effect, equaling 100 is addition, is antagonism less than 100.R represents resistance examination worm, and S represents responsive examination worm.Result of the test sees Table 1
2. apple Tetranychus urticae medicament provides former medicine for producer, is mixed with the preparation that needs by research department.Test method is with reference to " the agricultural industry criteria NY/T1154.7-2006 of the People's Republic of China (PRC) ".The examination worm is the female one-tenth mite of Tetranychus urticae of picking up from the field, select the one-tenth mite of growth uniformity, insert and put apple blade (red fuji apple, the moulding blade of New Development then) culture dish that diameter is 9 centimetres, every ware connects 30, and every processing connects three wares, sprays under 50PSI pressure with the PottER spray tower, ware of each spray, 3 milliliters of every ware spraying liquids.Blank spray equivalent clear water.General each processing is provided with 5 concentration gradients.The culture dish of handling is placed on the porcelain basin, loads onto small amount of water on the porcelain basin, prevents that mite from runing away.Put into 25 ℃ then, cultivate in the 12H/12H illumination box, checked in 48 hours and to calculate lethality by dead borer population.Non-resistance examination worm is picked up from the research institute insectary, and test method is the same.Calculate virulence equation and lethal concentration of 50 LC50 with method of least squares, calculate the toxicity index of medicament and the co-toxicity coefficient of using with (CTC value) according to the abundant method of Sun Yun, CTC value greater than 100 be synergistic effect, equaling 100 is addition, is antagonism less than 100.
The measurement result of diamond-back moth, Tetranychus urticae see Table 1 respectively, table 2.R represents resistance examination worm, and S represents responsive examination worm.
Table 1 different disposal is to the Toxicity Determination result of non-resistance (s) and resistance (r) diamond-back moth
Handle |
LC50(ppm) |
Resistance index |
Co-toxicity coefficient |
Avermectin 1+ flufenoxuron 1 (s) |
0.59 |
|
128.12 |
Avermectin 1+ flufenoxuron 10 (s) |
0.98 |
|
331.91 |
Avermectin 1+ flufenoxuron 20 (s) |
1.56 |
|
320.56 |
Avermectin 1+ flufenoxuron 40 (s) |
2.56 |
|
274.49 |
Avermectin 1+ flufenoxuron 80 (s) |
5.12 |
|
173.75 |
Avermectin 1+ flufenoxuron 100 (s) |
6.21 |
|
151.42 |
Avermectin 1+ flufenoxuron 1 (R) |
4.21 |
|
240.44 |
Avermectin 1+ flufenoxuron 10 (R) |
2.65 |
|
469.80 |
Avermectin 1+ flufenoxuron 20 (R) |
3.21 |
|
397.51 |
Avermectin 1+ flufenoxuron 40 (R) |
4.26 |
|
303.60 |
Avermectin 1+ flufenoxuron 80 (R) |
4.98 |
|
261.54 |
Avermectin 1+ flufenoxuron 100 (R) |
5.23 |
|
249.40 |
Avermectin (s) |
0.39 |
|
|
Flufenoxuron (s) |
12.23 |
|
|
Avermectin (R) |
8.24 |
21.13 |
|
Flufenoxuron (R) |
13.12 |
1.07 |
|
Table 1 different disposal is to the Toxicity Determination result of non-resistance (s) and resistance (r) Tetranychus urticae
Handle |
LC50(ppm) |
Resistance index |
Co-toxicity coefficient |
Avermectin 1+ flufenoxuron 1 (s) |
0.21 |
|
175.6 |
Avermectin 1+ flufenoxuron 10 (s) |
0.42 |
|
381.32 |
Avermectin 1+ flufenoxuron 20 (s) |
0.87 |
|
284.87 |
Avermectin 1+ flufenoxuron 40 (s) |
1.35 |
|
259.94 |
Avermectin 1+ flufenoxuron 80 (s) |
2.12 |
|
211.04 |
Avermectin 1+ flufenoxuron 100 (s) |
2.42 |
|
195.81 |
Avermectin 1+ flufenoxuron 1 (R) |
2.35 |
|
264.20 |
Avermectin 1+ flufenoxuron 10 (R) |
1.52 |
|
444.42 |
Avermectin 1+ flufenoxuron 20 (R) |
1.87 |
|
364.64 |
Avermectin 1+ flufenoxuron 40 (R) |
2.69 |
|
254.77 |
Avermectin 1+ flufenoxuron 80 (R) |
3.32 |
|
206.97 |
Avermectin 1+ flufenoxuron 100 (R) |
3.45 |
|
199.28 |
Avermectin (s) |
0.19 |
|
|
Flufenoxuron (s) |
6.23 |
|
|
Avermectin (R) |
5.65 |
29.74 |
|
Flufenoxuron (R) |
6.89 |
1.11 |
|
As seen from Table 1, Avermectin and flufenoxuron are composite, 1: 1-1: in the scope of 100 (by quality), diamond-back moth is had very high synergistic effect.The examination worm synergistic effect that Avermectin is produced resistance is more obvious.
As seen from Table 2, Avermectin and flufenoxuron are composite, 1: 1-1: in the scope of 100 (by quality), mite is had higher synergistic effect.Examination worm synergistic effect to Avermectin product and resistance is more obvious.
Embodiment
Application example one: control diamond-back moth
By Avermectin 0.5%, flufenoxuron 5%, emulsifier 16018%, emulsifier 500#6%, surplus is toluene and tricresyl phosphate, is mixed with missible oil.This prescription is by 1500 times of dilution sprayings, behind the medicine 72 hours control efficiency be 96.6%, 1.8% abamectin emulsifiable concentrate and 5% flufenoxuron missible oil according to using with quadrat method, 72 hours preventive effects are respectively 77.3% and 76.0% behind the medicine.
Application example two: control diamond-back moth
By Avermectin 0.5%, flufenoxuron 10%, emulsifier 16018%, emulsifier 500#6%, surplus is toluene and tricresyl phosphate, is mixed with missible oil.This prescription is by 3000 times of dilution sprayings, behind the medicine 72 hours control efficiency be 98.5%, 1.8% abamectin emulsifiable concentrate and 10% flufenoxuron missible oil according to using with quadrat method, 72 hours preventive effects are respectively 68.3% and 73.0% behind the medicine.
Application example two: control Tetranychus urticae
By Avermectin 0.3%, flufenoxuron 3%, emulsifier 16018%, emulsifier 500#6%, surplus is toluene and tricresyl phosphate, is mixed with missible oil.This prescription is by 1000 times of dilution sprayings, behind the medicine 72 hours control efficiency be 99.0%, 1.8% abamectin emulsifiable concentrate and 15% flufenoxuron missible oil according to using with quadrat method, 72 hours preventive effects are respectively 54.5% and 66.5% behind the medicine.
Application example two: control Tetranychus urticae
By Avermectin 0.5%, flufenoxuron 10%, emulsifier 16018%, emulsifier 500#6%, surplus is toluene and tricresyl phosphate, is mixed with missible oil.This prescription is by 3000 times of dilution sprayings, behind the medicine 72 hours control efficiency be 98.6%, 1.8% abamectin emulsifiable concentrate and 15% flufenoxuron missible oil according to using with quadrat method, 72 hours preventive effects are respectively 63.3% and 69.0% behind the medicine.