| The insect, Phenacoccus solenpsis Tinsley, recorded as a great threat to many agricultural cropsparticularly cotton has a strong ability to reproduce. In order to reduce the usage of pestides, screeningactive volatiles was the purpose. We studied whether the cotton volatile compounds is changed by theinfestations of Phenacoccus solenpsis Tinsley and compared with those of undamaged, uninfested,and artificially damaged plants. Gas chromatography-mass spectrometry analyses revealed consistentdifferences in the profiles of volatile compounds between Phenacoccus solenpsis Tinsley-infestedcotton plants and undamaged ones. The results showed that cotton plants infested by Phenacoccussolenpsis Tinsley emitted Methyl Salicylate, and Studies have shown that Methyl Salicylate isattractive to many predatory insects.To study the form of reproduction of cotton mealy bug and confirm whether parthenogenesisoccurs in Phenacoccus solenopsis,1001stnymphs were selected to100tubes separately. Underlaboratory conditions(light-period L:D=14:10,25±1℃with RH75±1%), observation is conductedeveryday. Phenacoccus solenpsis feed on fresh lettuce.1day,7day and10day of cotton mealy bugstarted to lay eggs on the third day after mating. The virgin cotton mealy bugs didnot oviposit about30to40days after molting to death. |
PDF Full Text Request