Pesticidal composition for preventing and controlling small sucking pests
A pest and small-scale technology, applied in the direction of insecticides, acaricides, biocides, etc., to achieve the effect of expanding the control spectrum
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Embodiment 1
[0024] Example 1. Indoor virulence determination and synergistic ratio screening of adult whitefly whitefly
[0025] On the basis of the preliminary test, the mass ratios of pyridaben and flonicamid were set to 1:1, 3:1, 5:1, 10:1, 1:10, 1:5, 1 :3 ratio to determine its combined toxicity to whitefly adults. On the basis of calculating the dosage of the two insecticides, weigh appropriate amounts of pyridaben and flonicamid respectively, add appropriate amount of water to dissolve them to the required concentration, and then use them in the following agar leaf soaking test.
[0026] Toxicity assays for adults of Bemisia tabaci were performed in glass finger tubes. The specific operation process is as follows: Spread 3mL of 1.8%-2% agar on the bottom of the glass finger tube, and wipe the water vapor on the tube wall with absorbent paper after the agar has solidified. Collect the leaves of unsprayed, flat cabbage seedlings without insects, and use a puncher to punch out circul...
Embodiment 2
[0031] Embodiment 2. Synergistic ratio is to the control spectrum test of other pests
[0032] On the basis of the above-mentioned Example 1 test, the ratio with synergistic effect on Bemisia tabaci was screened out, and the synergistic ratio and two single doses were prepared respectively, and the concentrations were their corresponding LC 50 After the leaves were treated, the leaf-dipping method was used to introduce the populations of Tetranychus truncatus and Aphis gossypii collected from the field in Changping District, Beijing, respectively. Each treatment was repeated 4 times to test the mortality rate; Obtain the corrected mortality rate and screen the optimal synergistic ratio.
[0033] The virulence determination of female adults of Tetranychus truncation was carried out in plastic petri dishes with a diameter of 35 mm. The specific operation method is as follows: spread 3 mL of water agar with a concentration of 0.2% on the bottom of the petri dish, and the agar is...
Embodiment 3
[0040] Embodiment 3. field spray control test
[0041] The field control effect test was carried out on the eggplant "Yuanza No. 16" in Nankou Experimental Base, Changping District, Beijing, and pyridaben (No. 1), flonicamid (No. 2), pyridaben and flonicamid were set to The mass ratios are 1:1 (No. 3), 5:1 (No. 4), 1:5 (No. 5), 1:3 (No. 6), 6 different chemical treatments, plus a clean water control, a total of 7 Treated differently. Every 10 eggplant seedlings was regarded as one repetition, and each treatment was set with 40 eggplant seedlings, which were regarded as 4 repetitions. Take an appropriate amount of 20% pyridaben wettable powder and 10% flonicamid water-dispersible granule, and then thoroughly carry out the two according to the active ingredient ratio of 1:1, 5:1, 1:5, and 1:3. After mixing, take No. 1-6 treatment solutions respectively, dilute them 3000 times, and spray them for later use. The chemical solutions of different treatments are all prepared and us...
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