Study On Phototactic Ratio Withthree Kinds Of Stored Grain Pest

This paper studies on Cryptolestes turcicus ? Cryptolestes pusillus and Cryptolestes ferrugineusto different wavelengths of light taxis.The researchusinglight behavior reaction device to test these female pests in the phototactic ratio with experimental wavelength in 303nm?320nm?330nm?340nm?351nm?368nm?400nm?445nm?460nm?480nm?520nm?525nm?545nm?560nm?575nm?580nm and 605 nm when emergence one day,Eleven days,Twenty-one days and Thirty-one dayswithin four walls.The best trapping effect on femaleadultCryptolestesturcicuswith experimental wavelength in 303 nm,320nm,351 nm,368nm,560 nm and 580 nm.The maximum phototactic ratio of femaleadult had reached51.11%.It is a little difference in 330 nm,445nm and 545 nm on trapping effect which phototactic ratio between4.44%-20%.The best trapping effect on femaleadultCryptolestespusilluswith experimental wavelength in 330 nm,575nm and 460 nm.Thephototactic ratiowhich between15%-25% ofCryptolestesferrugineus in 351 nm,400nm and 520 nm on trapping effectwhen emergence four days.Cryptolestes pusillus have best phototactic ratio and Cryptolestesferrugineuswith difference.It have a peak valuebetween300 nm,400nm and 500 nm.Cryptolestesturcicusbetween 10%-50%,Cryptolestespusillusbetween 50%-70%,Cryptolestesferrugineus between 15%-25%.The experiment shows thatwavelengthin 368 nm?351 nm and 303 nmhave good trapping effect on Cryptolestes turcicus.The wavelengthin 320nm?575nm and 330 nmhave good trapping effect on Cryptolestes pusillus.The wavelengthin 351nm? 400 nm and 445 nmhave good trapping effect on Cryptolestes ferrugineus.In addition on the effect of the age of phototaxis eclosion on rusty grain beetle.Phototaxis decreases with the increase of age on Cryptolestes turcicus.Phototaxis with the increase of age slightly decreased on Cryptolestes pusillus.Phototaxis increases with the increase of age on Cryptolestes ferrugineus.Thus indicate that eclosion age is difference from effect of phototaxis on rusty grain beetle.