Resistance induction in wheat plants by silicon and aphids

Scientia Agricola

Flávia Batista Gomes¹  Jair Campos De Moraes¹  Custódio Donizete Dos Santos¹  Márcio Marcos Goussain² 

[1] ,UFLALavras MG ,Brasil

关键词: Schizaphis graminum;    Triticum aestivum;    pest management;    induced resistance;    host plant resistance;    Schizaphis graminum;    Triticum aestivum;    manejo de pragas;    resistência induzida;    resistência de plantas a insetos;   

DOI  :  10.1590/S0103-90162005000600006

来源: SciELO

【 摘 要 】

The pest greenbug Schizaphis graminum (Rondani) (Hemiptera: Aphididae) stands out among the factors limiting Brazilian wheat production. Chemical control is predominant in aphid management making the production dependent on insecticides. The effect of silicon and previous infestation with aphids on the induction of resistance to the greenbug was evaluated in wheat plants. Treatments consisted of control; fertilization with calcium silicate; plant infestation with aphids; fertilization with calcium silicate + plant infestation with aphids. A free-choice preference test was performed 35 days after seedling emergence; the aphid's intrinsic rate of population increase (r m) was also determined, and the activities of three enzymes (peroxidase, polyphenoloxidase, and phenylalanine ammonia-lyase) involved in plant defense were quantified. Silicon fertilization and the previous infestation with aphids induced wheat plant resistance to the greenbug.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License