麦蚜的阶段性为害对小麦产量和品质影响的研究

测定麦蚜为害后对小麦产量和品质的影响，结果表朗：麦蚜为害后，可使小麦穗粒数减少18．60％，千粒重下降45．24％，机位数达到30．19％。为害性表现为小麦灌浆前期六于灌浆中后期。小麦灌浆后期，由于蚜虫的为害，面粉中的氨基酸总量和主要氨基酸含量、维生素B1和维生素C含量明显下降。

Studies on effects of cereal aphids on wheat yields and quality at various wheat growth stages

Studies on effects of Rhopalosiphum padi (L.) on wheat yield and quality show the qualltityof grains of wlieat ear was minimized 18. 60％ average and tbe weight of 1000 wheat grains was redu-ced 45. 24％ average. The quantity of blighted grains rised 30. 19％ The harmfulncss of aphids to thewheat was more serious at the stage of unmilking tban tbc stage of milking anti post-milking. Moreo-ver, at the stage of post-milking, the total contents of amino acids and many principal amino acidswere obviously reduced due to the iniury of aphids as well as Vitamine B, and C.