摘要:

AbstractInjection of caffeine into adult maleEphestia kühniellainduced a reduction in the amount of neurosecretory material in the resorcin fuchsin stainable (A‐) cells of the pars intercerebralis. Both hemel (hexamethyl melamine) and tepa (tris (1‐aziridinyl) phosphine oxide) treatments resulted in an increase in stainable neurosecretory products in the cytoplasm of the A‐cells. The increase after hemel treatment was largely a result of increased synthesis of neurosecretory material as indicated by increased nuclear volume and nuclear‐cytoplasmic ratio. No changes were induced by hemel in the corpora cardiaca and allata of the adult maleE.kühniella.This disruption in neuroendocrine function is believed to be involved in the observed mating aberrations (permanent copulation and sterile matings) by adult males after hemel

ISSN:0307-6962    

DOI:10.1111/j.1365-3032.1976.tb00886.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

摘要:

AbstractTwo groups of brussels sprout plants of one variety given different fertilizer treatments proved ‘resistant’ and ‘susceptible’ to bothMyzus persicae and Breicoryrie brassicae,as measured by aphid mean relative growth rate. The hypothesis that leaf disc would fail to reflect differences in ‘nutritionallybased’ plant resistance was confirmed with B.brussicue but not M.persicae. Both aphids grew more slowly on discs than leaves of ‘susceptible’ plants; the reverse tendency showed on ‘resistant’ material. Total:(, amino nitrogen proved poorly correlated with aphid performance. Previously published (van Emden&Bashford, 1971) equations relating individual amino acids to aphid performance gave a better fit to the results, but still failed to account for the reduced performance of the aphids on

ISSN:0307-6962    

DOI:10.1111/j.1365-3032.1976.tb00887.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY

ISSN:0307-6962    

DOI:10.1111/j.1365-3032.1976.tb00889.x

出版商:Blackwell Publishing Ltd    

年代:1976

数据来源: WILEY