Research On The Monitoring And Control Technologies Of Sunflower Moth In Qiqihar

Homoeosoma nebulellum is the most serious pest that damage the production of sunflower, and ithas shown a serious trend in Heilongjiang province in recent years. The rampant damage of this pest hasseriously affected the development of sunflower industry in Qigihar range and the increase farmers’income as well. This thesis studies the techniques of H. nebulellum’s monitoring and control and itsintegration test. And through comprehensive statistical analyzing of monitoring the number of H.nebulellum adult, measuring the efficacy of its control and the yield of this pest, the paper determinesthe suitable dose and the optimal control period of this techniques；furthermore through consideringH.nebulellum’s control efficiency, cost benefit analysis, input-output ratio and benefit analysis, the paperevaluates the techniques of H. nebulellum’s monitoring and control, their relevant tests and improvesfield applicative so as to determine the optimal mode of monitoring and control techniques against H.nebulellum around Qiqihar.According to the comparative datas between pest forecast lamp and gyplure, it can be seen thesame regularity of H. nebulellum’s outbreak and peak anastomosis. However the pest lamp has a highdegree of automation, lower labor intensity and the number of pest trapping is far higher than gypluretrapping, but the pest lamp cannot differentiate from pests and insects approriately. Compared with pestforecast lamp, gyplure trap is manufatctured simply and safely, has a high selectivity and low cost,while with less trapping numbers and high labor intensity at the same time. Therefore, it is reasonable tosuggest taking pest forecast lamp as the main means of monitoring H. nebulellum in the large plantingarea, especially in the cultivation cooperatives in contrary to gyplure for retail planting or remote sites.As for gyplure method in H. nebulellum adult stage, the test datas show that if put in45traps inevery hm2, the rate of grain damage is0.12%, the control efficiency can reach60.52%. In H. nebulellumegg stage, applying biological control of Trichogramma in different time release to control the pest ofsunflowers in the same sowing period, it can be seen that it is time to relaese Trichogramma so thatcan get the potimal effect when the disk will come out, and the average rate of control effect reaches64.05%. Proper late-sowing can effectively avoid H. nebulellum’s prosperity and reduce the pest harm.From the results of seed test and the yield measurement, it is around May25ththat the sunflow can gainits highest havest in Gannan where the first generation of H. nebulellum takes its genesis; while it isaround June5thin Tailai where there is the second generation of H. nebulellum.Adjusting sowing time+gyplure, adjusting sowing time+Trichogramma release, Trichogrammareleass+gyplure, adjusting sowing time+gyplure+Trichogramma release, the average rates of these4control techniques agaist H. nebulellum are63.50%,70.33%,65.75%and75.25%correspondingly.Among them, the forth technique has the best effect on controling H. nebulellum and the second oneprovides the lowest cost and the highest input-output ratio that is1:28.46, hence this technique iseconomically optimal.Through comprehensive analyzing of the control effect, rate of yield, input-output ratio and variousbenefits in each group,it can be determined that in the medium sites or years of H. nebulellum’s prosperity, it is availible to take adjusting sowing time+Trichogramma release technique; in serioussites or years, prefer adjusting sowing date+gyplure+Trichogramma release technique..