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ARS Home » Research » Publications at this Location » Publication #62466
Title: ALLELOCHEMICALS IN MAIZE RESISTANT TO SPODOPTERA FRUGIPERDA AND HELICOVERPA ZEA

Author
item Wiseman, Billy
item Snook, Maurice
item Carpenter, James
item ESPELIE, K. - UNIV. OF GA

Submitted to: Allelo Chemicals
Publication Type: Book / Chapter
Publication Acceptance Date: 4/23/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary: Not required.

Technical Abstract: Plant resistance to insects, specifically antibiotic resistance, offers biologically, economically, and environmentally sound alternatives to pesticides for controlling insect pests. Resistance to corn earworm (CEW), Helicoverpa zea, (Boddie) and fall armyworm (FAW), Spodoptera frugiperda, (J. E. Smith) has been described for some maize, Zea mays L., cultivars. Several allelochemicals in maize have been identified and implicated in its resistance to the CEW and FAW. A highly significant relationship between the growth of CEW and FAW larvae and flavone (maysin, chlorogenic acid, apimaysin, and 3'-methoxymaysin) concentration in maize silks has been established. Weights of 9-day-old CEW larvae ranged from 8 mg on 'PI340856' to 952 mg on 'PI340855'. Maysin content (a luteolin-C-glycoside) of silks ranged from zero for eighteen PI's to 1.128% for PI340856. Silks of 'PI340853' have no detectable maysin but they have a high level of the allelochemical glactoluteolin which causes a reduction in the growth of larvae with an average weight of only 37 mg.