Functional foliar fertilizer
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a functional foliar fertilizer.
Background
Thrips inhabiting on crop vegetables in China are more than 40, wherein more serious Thrips (T.tabaci Lindeman), palmi Karny, huang Jima (T.flavus), yellow chest Thrips (T.hawaiiensis) and color Thrips (T.color) are among Thrips (threps Linnaeus); frankliniella (Frankliniella) Frankliniella (f.occidentalis), frankliniella (f.intonsa) and Frankliniella (f.tenuicornis). The thrips can absorb juice of vegetable tender tips and other parts by adults and nymphs, so that tender leaves shrink, malformation, formation of dead spots and other different damages are generated, photosynthesis of crops is seriously affected, and crop yield is reduced. In addition, the fruit setting period is harmful and can cause early ageing, rigidification or yellowing of crops in the young fruit period. Secondly, thrips can also spread plant virus diseases.
In agricultural production, the pesticide is sprayed to prevent and treat diseases and insect pests such as thrips. The common medicines for preventing and treating thrips comprise spinetoram, chlorfenapyr, emamectin benzoate and the like, but the prevention and treatment effect of the thrips is reduced year by year along with the continuous development of drug resistance of the thrips to the existing medicines. Therefore, the development of a safe and efficient novel medicament for preventing and treating thrips has important significance. At present, no report on compounding wintergreen oil with doramemycin, tolfenpyrad or spinetoram is known, and the method can provide support for developing novel medicaments.
Foliar fertilizer is a type of fertilizer that avoids the application of nutrients to the leaves of crops and serves its function by being absorbed by the leaves. Practices prove that the foliar fertilizer has the advantages of rapid fertilizer efficiency and high fertilizer utilization rate. However, the existing foliar hypertrophy is mainly used for providing nutrients for the growth of crops, and does not have the efficacy of preventing and controlling plant diseases and insect pests.
Disclosure of Invention
The invention aims to provide a functional foliar fertilizer which comprises a fertilizer and an insecticidal composition, wherein the fertilizer part can provide nutrients for the growth of crops, and the insecticidal composition part can effectively prevent and control insect pests on the crops, so that the dual effects can be achieved by one-time application; in addition, the synergistic effect of the wintergreen oil and doramectin, tolfenpyrad or spinetoram in the insecticidal composition can improve the prevention and treatment effect on thrips, and can provide support for developing and developing safe and efficient novel medicaments for preventing and treating thrips.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the insecticidal composition is prepared from wintergreen oil and doramemycin, tolfenpyrad or spinetoram according to a ratio of 1-300: 150-1.
More specifically, the mass ratio of the wintergreen oil to the doramemycin is 1-9:9-1.
More specifically, the mass ratio of the wintergreen oil to the tolfenpyrad is 1-25:7-1.
More specifically, the mass ratio of the wintergreen oil to the spinetoram is 1-20:20-1.
The invention also provides a functional foliar fertilizer comprising the insecticidal composition of any one of claims 1 to 4.
More specifically, the functional foliar fertilizer is prepared by mixing the following components in percentage by mass: 1-5% of the insecticidal composition, 40-60% of fertilizer, 1-10% of dispersing agent, 1-8% of wetting agent and the balance of filler; wherein the fertilizer is selected from one or more of potassium nitrate, monopotassium phosphate, potassium sulfate, zinc sulfate, potassium chloride, ammonium chloride and sodium octaborate tetrahydrate; the dispersing agent is sodium lignin sulfonate; the wetting agent is prepared from sodium dodecyl benzene sulfonate and sodium dodecyl sulfate according to the weight ratio of 1:1, mixing the materials according to the mass ratio; the filler is one or more selected from the group consisting of clay, kaolin, diatomite, pyrophyllite, light calcium hydrochloride and attapulgite.
Compared with the prior art, the invention has the following beneficial effects:
(1) The insecticidal composition provided by the invention is composed of wintergreen oil and doramectin, tolfenpyrad or spinetoram according to a certain mass ratio, has a synergistic effect on insect pests such as thrips, can improve the control effect on the insect pests, reduces the application amount of the agent, and is beneficial to reducing the control cost of the insect pests; meanwhile, the development of insect pest resistance can be delayed, and support can be provided for developing and developing safe and efficient novel medicaments for preventing and treating thrips.
(2) The functional foliar fertilizer provided by the invention contains the fertilizer and the insecticidal composition, wherein the fertilizer part can provide nutrients for the growth of crops, and the insecticidal composition part can effectively prevent and control insect pests on the crops, so that the dual effects can be achieved by one-time application.
Detailed Description
The following description of the embodiments of the present invention will be apparent from, and is intended to provide a thorough description of, the embodiments of the present invention, and not a complete description of, the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
Example 1: indoor biological activity test of wintergreen oil after compounding
1. Test agent
Wintergreen oil (methyl salicylate 99.4% and Jiangxi Hai Rui Natural plant Co., ltd.)
99% doramemycin original drug (Wuhan Xingzhong Chengjingsu Co., ltd.)
98% tolfenpyrad (Shandong Hailier chemical Co., ltd.)
81.2% spinetoram (Kedi Hua agricultural technologies Co., ltd.)
Dissolving the raw materials with dimethyl sulfoxide, diluting with 0.1% Tween-80 to obtain single-dose mother solution, and setting multiple groups of ratios, wherein each single dose and each group of ratio mixture have 5 gradient mass concentrations of 50mL of each mass concentration liquid medicine according to an equal ratio method.
2. Test pest
The method comprises the steps of collecting the chest thrips flavescens in a cruciferous vegetable planting area, breeding for multiple generations in a laboratory by using clean vegetable leaves, and selecting 1-year-old nymphs with consistent physiological states as test insects.
3. The test method comprises the following steps: ( Reference to section 6 of pesticide "NY/T1154.6-2006 pesticide indoor bioassay test guidelines: insecticidal Activity test method for soaking insects )
And (3) allowing the tested pests to enter the liquid medicine for 10s, sucking the excessive liquid medicine by using filter paper, and transferring the liquid medicine to the original feeding condition for feeding. Repeating the treatment for 4 times, immersing 25 heads of insects for each time, and setting a solution treatment only containing 0.1% of Tween-80 as a blank control; after 24 hours of treatment, the death conditions of the test insects are investigated, and the test insects are respectivelyRecording total and dead insects number of each treatment, calculating corrected mortality of each treatment, performing regression analysis on the log value of concentration of each treatment agent and the probability value of corrected mortality by DPS software, and calculating LC of each treatment agent 50 。
4. Evaluation of pharmaceutical Agents
Co-toxicity coefficients (CTC values) of the blends were calculated according to the grand cloud Pei method and the criteria were divided according to the combined effect: the co-toxicity coefficient (CTC) is more than or equal to 120, and the synergistic effect is shown; the cotoxicity coefficient (CTC) is less than or equal to 80 and shows antagonism; 80< co-toxicity coefficient (CTC) <120 shows additive effect. The experimental results are shown in tables 1-3.
5. Calculation method
In the above formula: p- -mortality in units of; k- -number of dead insects; n- -total number of insects treated.
In the above formula: p (P) 1 -correct mortality in units of; p (P) t -mortality rate in units of treatment; p (P) 0 Blank mortality in%.
TABLE 1 determination of indoor biological Activity of Holly oil and doramemycin combinations against Brevibacterium flavum
Medicament name and ratio
|
LC 50 (mg/L)
|
ATI
|
TTI
|
CTC
|
Wintergreen oil
|
7.6194
|
100.0000
|
--
|
--
|
Doramectin
|
43.7145
|
17.4299
|
--
|
--
|
Wintergreen oil 1: doramemycin 9
|
24.0977
|
31.6188
|
25.6869
|
123.0929
|
Wintergreen oil 1: doramemycin 7
|
17.6692
|
43.1225
|
27.7512
|
155.3898
|
Wintergreen oil 1: doramectin 3
|
9.7815
|
77.8960
|
38.0724
|
204.5995
|
Wintergreen oil 1: doramectin 1
|
10.4366
|
73.0065
|
58.7150
|
124.3406
|
Wintergreen oil 3: doramectin 1
|
7.1047
|
107.2445
|
79.3575
|
135.1410
|
Wintergreen oil 7: doramectin 1
|
4.4375
|
171.7048
|
89.6787
|
191.4666
|
Wintergreen oil 9: doramectin 1
|
2.5108
|
303.4650
|
91.7430
|
330.7773 |
From Table 1, the mass ratio of the wintergreen oil to the doramemycin is 1-9: the co-toxicity coefficient in the range of 9-1 is more than 120, namely the biological activity of the compound oil and doramemycin on the chest thrips is shown as a synergistic effect.
TABLE 2 determination of indoor biological Activity of Holly oil and tolfenpyrad combination on Brevibacterium flavum
Medicament name and ratio
|
LC 50 (mg/L)
|
ATI
|
TTI
|
CTC
|
Wintergreen oil
|
7.6194
|
100.0000
|
--
|
--
|
Tolfenpyrad
|
6.3068
|
120.8125
|
--
|
--
|
Wintergreen oil 1: tolfenpyrad 7
|
3.8747
|
196.6449
|
118.2109
|
166.3509
|
Wintergreen oil 1: tolfenpyrad 3
|
1.2601
|
604.6663
|
115.6093
|
523.0255
|
Wintergreen oil 1: tolfenpyrad 1
|
4.5966
|
165.7616
|
110.4062
|
150.1380
|
Wintergreen oil 3: tolfenpyrad 1
|
5.5388
|
137.5641
|
105.2031
|
130.7605
|
Wintergreen oil 7: tolfenpyrad 1
|
2.7495
|
277.1195
|
102.6016
|
270.0929
|
Wintergreen oil 15: tolfenpyrad 1
|
5.7414
|
132.7098
|
101.3008
|
131.0057
|
Wintergreen oil 20: tolfenpyrad 1
|
4.2233
|
180.4134
|
100.9911
|
178.6429
|
Wintergreen oil 25: tolfenpyrad 1
|
6.0401
|
126.1469
|
100.8005
|
125.1452 |
From Table 2, the mass ratio of the wintergreen oil to the tolfenpyrad is 1-25: the co-toxicity coefficients in the range of 7-1 are all more than 120, namely the synergistic effect is shown on the biological activity of the thrips flavescens after the wintergreen oil and the tolfenpyrad are compounded.
TABLE 3 determination of indoor biological Activity of Holly oil and spinetoram combinations on Brevibacterium flavum
Medicament name and ratio
|
LC 50 (mg/L)
|
ATI
|
TTI
|
CTC
|
Wintergreen oil
|
7.6194
|
100.0000
|
--
|
--
|
Spinetoram
|
1.7526
|
434.7484
|
--
|
--
|
Wintergreen oil 1: spinetoram 20
|
1.9594
|
388.8639
|
418.8080
|
92.8502
|
Wintergreen oil 1: spinetoram 15
|
1.0855
|
701.9254
|
413.8266
|
169.6182
|
Wintergreen oil 1: spinetoram 7
|
1.5148
|
502.9971
|
392.9048
|
128.0201
|
Wintergreen oil 1: spinetoram 3
|
1.8009
|
423.0885
|
351.0613
|
120.5170
|
Wintergreen oil 1: spinetoram 1
|
2.2803
|
334.1402
|
267.3742
|
124.9710
|
Wintergreen oil 3: spinetoram 1
|
1.1772
|
647.2477
|
183.6871
|
352.3643
|
Wintergreen oil 7: spinetoram 1
|
3.7623
|
202.5197
|
141.8435
|
142.7768
|
Wintergreen oil 15: spinetoram 1
|
5.0020
|
152.3271
|
120.9218
|
125.9716
|
Wintergreen oil 20: spinetoram 1
|
4.8795
|
156.1512
|
115.9404
|
134.6823 |
From Table 3, the mass ratio of the wintergreen oil to the spinetoram is 1-20: the co-toxicity coefficients in the range of 15-1 are all more than 120, namely the biological activity of the compound oil of wintergreen and spinetoram on the chest thrips is shown as a synergistic effect; only at 1: at 20, the co-toxicity coefficient is greater than 80 and less than 120, and the sum is shown.
In conclusion, when the wintergreen oil and the doramectin, the tolfenpyrad or the spinetoram are combined for use, the synergistic effect on insect pests such as thrips can be achieved, the control effect on the insect pests can be improved, the application amount of the medicament can be reduced, and the pest control cost can be reduced; meanwhile, the development of insect pest resistance can be delayed, and support can be provided for developing and developing safe and efficient novel medicaments for preventing and treating thrips.