Determination Of Virulence Of New Soil Fungicide HM And Research On Methods Of Controlling Soil Pests And Diseases

The output and quality of facility vegetables are affected by soil-borne diseases,and the main way for producers to solve soil-borne diseases is to use pesticides.However,improper use of traditional pesticides and other problems can cause soil environmental degradation.HM is a new type of environmentally friendly soil killer,but its control methods for different soil diseases are still unclear,and it lacks scientific use methods.This test is based on clarifying the control effects of HM on the most common plant diseases and insect pests in the current vegetable field soils,and studying different soils against potato scab,cucumber wilt,soybean cyst nematode,and cruciferous root swelling Pass on the inhibitory and killing effects of disease-causing pathogenic microorganisms,explore the best application method of HM for the above-mentioned diseases and insect pests,and provide manufacturers with scientific methods of use that are suitable for different production conditions and different diseases and insect pests.The main findings are as follows:1.Control effect HM can be used for the prevention and control of soil-borne diseases.Except,HM can play a better control effect on the diseases in the test materials:(1)Potato scab: Choose HM with a dilution factor of 250 times,and the best effect is to treat the soil for 15 minutes.The field incidence rate after spraying the soil was reduced from 45% to 5.83% and the disease index was 33.33 Reduced to 2.50,the control effect reached 92.50%,the dosage was 340 ~ 560 m L / mu;(2)Cucumber wilt: Choose HM with a dilution factor of 700 times,the best effect is the treatment of the soil for 18 minutes.The field incidence after spraying with soil spraying and plowing or drip irrigation has been reduced from 68% to 9% and from 64% decreased to 6%,the disease index decreased from 41.33 to 4.33 and 38.00 to 2.33,respectively,and the efficacy reached 89.52% and 93.87%.The dosage is 260 ~ 420 m L / mu,and the method of drip irrigation is more effective;(3)Soybean cyst nematode disease: It has no control effect on the eggs.For the second instar,the HM is selected to be diluted 150 times.The best effect is to treat the soil for more than 16 minutes.The soil is sprayed and turned over.The incidence rate decreased from 77.5% to 54.14%,the disease index decreased from 47.81 to 27.39,the control effect reached 42.71%,and the dosage was 240-300 m L / mu.(4)No control effect on spores of cruciferous vegetables.2.Usage Under the shading condition,the application period of HM is more than 6 days between the two application periods.It is necessary to strictly observe the safety interval cycle to avoid multiple application in a short period of time.3.Storage HM is easily decomposed by light.Storage should be stored in the original black packaging.