Effects Of Heavy Mental Cd²⁺ And Ni²⁺ On The Growth And Reproductive Behaviors Of Ostrinia Furnacalis （Guenee）

Heavy metal is a kind of biological hazards heavier environmental pollutants, there are many studies reports about the harm of heavy metal to plants and animals, but the report about heavy metal effects on insect growth and reproductive behavior is less.In order to further understand the impact of heavy metals on the growth and reproduction of crop production region of the insect,In the experiment use Ostrinia furnacalis（Guenée） as the experimental insect source, setting of Cd²⁺, Ni²⁺, Cd²⁺-Ni²⁺ mixed and blank control group 4 metal processing, with 5 mg/kg in the laboratory of Cd²⁺/ Ni²⁺ artificial feed continuous feeding for three generation O. furnacalis, study the growth and development of different generations after feeding on different heavy metals;Compared with he reproductive behavior of each generation of the normal female and male moth,Feeding on artificial diet containing heavy metals in each generation of female survivors courtship behavior, difference between male moth orientation behavior exhibit sexual;Effects of heavy metals on the quantity, the hatching rate of egg survival female moth oviposition.From the compared results of each generations of the heavy metal treatments with the control groups at 5 mg/kg concentration of Cd²⁺, Ni²⁺, Cd²⁺-Ni²⁺ of 3 kinds of heavy metals on the growth of O. furnacalis,and there has an inhibitory effect on O. furnacalis, except for the Ni²⁺ promote the pupa weight of male and female with 3 successive generations, the rest has retardation to the growth of O. furnacalis with each generation. Among them, the male and female pupa weight were first generation Ni²⁺ processing maximum, respectively 0.067 g and 0.053 g, female pupa weight to Cd²⁺ and Cd²⁺-Ni²⁺ treatments of the third generation of the minimum value is 0.053 g, the male pupa weight to Cd²⁺-Ni²⁺ treatment of the third generation of the minimum value is 0.04 g; the pupation rate and eclosion rate decreased with the increase of feeding, and generation of O. furnacalis, the inhibition effect of heavy metal is bigger, the minimum value was the Cd²⁺ of the second generation, a value of 92% and Cd²⁺-Ni²⁺ treatment of the third generation, a value of 48.46%. The larval stage of the Cd²⁺-Ni²⁺ mixed the third generation was the largest, followed by 19.64 d; the pupal stage in Cd²⁺-Ni²⁺ treatment beyond the second generation was the longest in group 2.7 d; on the other hand, the heavy metal treatment increased the percentage of malformed pupae of Ostrinia furnacalis pupae, morphology and growth of affected. The percentage of abnormal pupa in Cd²⁺-Ni²⁺ mixed the third generation of the largest value is 21.3%.Cd²⁺/ Ni²⁺ have effects on the calling percentage, the mating peak time and calling duration of the three generation of O. furnacalis. The courtship percentage in the second generation have the largest gap with the control group, third’s were the least,even showed promoting effect;The heavy metal processing courtship peak time of generation and control group consistent only in second, first, 3 generations have changed;The average duration of survival of female calling with increasing heavy metal feeding algebra of O. furnacalis and decrease, And the control group on behalf of the dark period of courtship duration as compared to 4.89 h, the average mating female moths of heavy metal treatment duration maximum appeared first generations of third dark period, 5.56 h in Cd²⁺-Ni²⁺ treatment; the minimum value is second, the 3 dark period was 3.08 hHeavy metal treatment has a moderating effect on the three generation O. furnacalis male moths orientation behavior : The first generation of performance for the promoting effect of Cd²⁺, Ni²⁺, Cd²⁺-Ni²⁺ showed inhibitory effect; Cd²⁺ and Cd²⁺-Ni²⁺ showed inhibition in the second generation, Ni²⁺ has inhibition and also have stimulative effect, but the kind of inhibitory effect, Cd²⁺-Ni²⁺ has the greatest inhibition effect and nickel has a minimum inhibition effect,which consistent with the third generation. Change of each generation of numerical size of 3 heavy metals treatment survival male moth orientation behavior in the presence of a trend, namely each percentage numerical with the generation decreases with the increase of the average response time and extend, with the generation increasin.The larvae fed on artificial diet containing heavy metal Cd²⁺/ Ni²⁺, each generation of female survivors of fecundity and egg hatching rate decreased obviously, and the female and male individuals unilateral for heavy metal treatment survival adult portfolio, its fecundity and egg fertility and both for the heavy metal treatment survival quantity and egg hatching rate of spawning adults combination are not the same.