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- W1994603553 abstract "Hail can cut completely through the whorl of young corn (Zea mays) plants causing complete defoliation. If only a portion of the stand is damaged, defoliated plants are subjected to shading by nondefoliated neighboring plants which benefit from reduced competition for light. Field experiments were conducted in 1986 and 1987 at the University of Illinois on a Flanagan silt loam (Aquic Argiudoll) to determine the relative contribution of both defoliated and nondefoliated plants to yield of the stand. Three hybrids were evaluated: Pioneer 3377, FR27 × FRMo17, and FRB73 × FR25. At the four-leaf stage the following treatments were imposed: cutting through the whorl of all plants 50 mm above ground level to effect complete defoliation (100-DEF) or cutting through the whorl of alternate plants (50-DEF). When compared to nondefoliated controls, the 100-DEF and 50-DEF treatments reduced grain yields on the average by 12.3 and 8.3%, respectively. No hybrid × defoliation interaction was detected for grain yield. With the 50-DEF treatment, compensation by nondefoliated plants was evident in the form of increased ears plant −1 and kernels ear −1 , and 100-seed weight depending on the hybrid and year. Increased barrenness was a significant factor in decreased yields of defoliated plants only for FR27 × FRMo17 in one year. Key words: Zea mays L., hail damage, yield components, prolificacy, barrenness" @default.
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- W1994603553 date "1991-04-01" @default.
- W1994603553 modified "2023-10-18" @default.
- W1994603553 title "Response of three corn hybrids to defoliation of neighboring plants" @default.
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- W1994603553 doi "https://doi.org/10.4141/cjps91-045" @default.
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