Investigation Of Millet Insect Pests In Taigu Region And Research On Comprehensive Prevention And Control Techniques

Millet(Setaria italica)is an important small coarse cereals crop in China,and it is also the main crop for farmers to get rid of poverty and become rich in dry land and hilly areas of Shanxi Province.In recent years,with the increase of millet planting area,the occurrence of millet pests is increasing year by year,which brings an important threat to millet production in Shanxi Province.Therefore,in view of the problems such as the current investigation of millet pests in Shanxi Province is not systematic;the types of pesticides are old and the use is not standardized;the control technology is backward and lack of standards and so on,this paper analyzes the control effect through the investigation of millet pests in Central Shanxi Province,indoor and outdoor screening of a new generation of low toxic and efficient insecticides,physical control,biological control and other comprehensive control measures Evaluation and other means can provide support for efficient control of millet pests,reasonable formulation of comprehensive prevention and control technical standards,and accurate guidance of green production of millet.The main research results are as follows:1.Through the field investigation of millet pests in Taigu District,there are 31 species of millet pests in 20 families of 5 orders,among which Coleoptera is the most,Lepidoptera is the second,and Hemiptera,Orthoptera and Acari are less.O.furnacalis,underground pests and leaf eating pests were the main pests,while other pests were less harmful.The occurrence peak of O.furnacalis was in the first and middle of June,the first and middle of July,the first and middle of August,and the end of August to the first ten days of September.2.Through the research on the control effect of solar wind-driven insecticidal lamp on millet pests,it was found that the total number of insects trapped by single lamp in 4 months was 17334,including 16917 pests and 417 beneficial insects,and the ratio of beneficial to harmful was 1:40.57.Compared with the control area,the egg loss of O.furnacalis decreased by more than 60% in the treatment area;the egg loss of M.hieroglyphica,diplococcus bifasciatus,decreased by more than 65% in the treatment area;the egg loss of L.hyalinus decreased by more than 75% in the treatment area.Compared with the control area,the flower leaf rate of millet in the treatment area decreased by more than 60%,the ridging rate decreased by more than60%,and the stem boring rate decreased by more than 65%.The solar wind sucking insecticidal lamp has a good control effect on Lepidoptera and Coleoptera pests,and has little impact on natural enemies,effectively reducing the amount of eggs,the rate of flower and leaf,the rate of ridge breaking and the rate of stem boring.3.The control effect of sex pheromone on O.furnacalis was studied.The results showed that the more traps were placed in the field,the more adults were trapped.In the three treatments,the average daily trapping amount of a single trap was 2.16,2.91 and 2.21,respectively.In consideration of economic factors and control effect,5 lure cores should be placed per hm2.4.The results of laboratory screening and field trials of a new generation of low toxicity and high efficiency insecticides showed that the control effect of 20 % flubendiamide at the concentration of 1.50 mg / L reached 85.72 % at 72 h,that of 10% tetrachlorothiamide at the concentration of 2.40 mg / L reached 90.47% at 72 h,that of 10 % cyanobromonamide at the concentration of 3.00 mg / L reached83.35% at 72 h,and that of 20% Flubendiamide at the concentration of 2.40 mg / L reached 90.47 % at 72 h,Under the concentration of 2.40 mg / L,the control effect at 72 h was 80.96%.The control effect of five new generation low toxic insecticides was similar to that of common insecticides in the market.In the field control effect test,the decline rates of 10% chlorantraniliprole and 20% flubendazole were 90.72% and92.99% respectively on the 7th day after field application,and the effect lasted for a long time.The decline rates of 10% chlorantraniliprole and 20% flubendazole were 79.28% and 79.41% respectively on the 14 th day after field application.When the occurrence of Asian corn borer is large,considering the control effect and environmental factors in parallel,it can be combined with pest forecast and applied to comprehensive control of millet.