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Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (4): 97-101.doi: 10.11924/j.issn.1000-6850.casb18020055

Special Issue: 园艺

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Mutual Damages Mediate Host Nitrogen Nutrition and Interspecific Competition Between Myzus persicae and Lipaphi erysimi

  

  • Received:2018-02-11 Revised:2018-04-13 Accepted:2018-04-19 Online:2019-01-31 Published:2019-01-31

Abstract: Myzus persicae and Lipaphi serysimi are the main insect pests of cruciferous vegetables, they are often combined in the same vegetable crops. In order to understand the interspecific interaction and potential competition mechanism of the two species, the mutual damages mediate host nitrogen nutrition andthe life characteristics and population quantity of the two aphid species were studied. The results showed that the cabbage plant damaged by M. persicae can significantly reduce the population quantity, population net reproductive rate, biomass growth rate on the damaged leaves of L. erysimi, as well as the net reproductive rate on the systemic leaves. The net reproductive rate of M. persicae infested on cabbage leaves damaged by L. erysimi was lowered. The content of glutamic acid increased and isoleucine content decreased significantly in cabbage leaves after M. persicae damage, while methionine content increased significantly after L. erysimidamage. The results suggested that changes of amino acids content mediated by M. persicae damage to cabbage plant could inhibit the growth and development of L. erysimi. PolyphagousM. persicae might have higher evolutionary developmental fitness than oligophagousL. erysimi.

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