Potential yield reductions in Maize Associated with an anthracnose/European corn borer pest complex in New York
In a 2-yr field study, the individual and combined effects of Colletotrichum graminicola and Ostrinia nubilalis (European corn borer [ECB]) on grain yield and stalk rot development in a maize hybrid susceptible to both organisms were determined. In 1983, a year favorable for development of anthracnose leaf blight and stalk rot, plants infested with ECB and or inoculated with C. graminicola at the whorl stage of development showed average grain reductions of 13.5 percent (12 q/ha), 35.2 percent (31.2 q/ha), and 46.5 percent (41.2 q/ha) in association with ECB injury, anthracnose development, and both ECB injury and anthracnose, respectively. The same treatments at the silk stage resulted in grain reductions of 6.4 percent (5.4 q/ha), 16.5 percent (13.8 q/ha), and 12.2 percent (10.2 q/ha), respectively. Inoculation and infestation of plants in the dough stage resulted in no yield reductions. In 1984, a year less favorable for anthracnose development, grain yield was reduced (10.7 percent, 9.6 q/ha) in plants inoculated with C. graminicola at the whorl stage and infested with ECB at the kernel blister stage but was not reduced in plants inoculated and or infested at later growth stages. Even minimal stalk damage by ECB significantly predisposed plants to antharcnose stalk rot development. Anthracnose stalk rot-induced grain reductions in New York consistently have been associated with early or midseason ECB infestations
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| Format: | biblioteca |
| Published: |
1986
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| Subjects: | GRANOS, ZEA MAYS, HIBRIDOS, COLLETOTRICHUM GRAMINICOLA, OSTRINIA NUBILALIS, LEPIDOPTERA, RENDIMIENTO, RESISTENCIA A LAS PLAGAS, PERDIDAS, ANTRACNOSIS, ENFERMEDADES FUNGOSAS, |
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| Summary: | In a 2-yr field study, the individual and combined effects of Colletotrichum graminicola and Ostrinia nubilalis (European corn borer [ECB]) on grain yield and stalk rot development in a maize hybrid susceptible to both organisms were determined. In 1983, a year favorable for development of anthracnose leaf blight and stalk rot, plants infested with ECB and or inoculated with C. graminicola at the whorl stage of development showed average grain reductions of 13.5 percent (12 q/ha), 35.2 percent (31.2 q/ha), and 46.5 percent (41.2 q/ha) in association with ECB injury, anthracnose development, and both ECB injury and anthracnose, respectively. The same treatments at the silk stage resulted in grain reductions of 6.4 percent (5.4 q/ha), 16.5 percent (13.8 q/ha), and 12.2 percent (10.2 q/ha), respectively. Inoculation and infestation of plants in the dough stage resulted in no yield reductions. In 1984, a year less favorable for anthracnose development, grain yield was reduced (10.7 percent, 9.6 q/ha) in plants inoculated with C. graminicola at the whorl stage and infested with ECB at the kernel blister stage but was not reduced in plants inoculated and or infested at later growth stages. Even minimal stalk damage by ECB significantly predisposed plants to antharcnose stalk rot development. Anthracnose stalk rot-induced grain reductions in New York consistently have been associated with early or midseason ECB infestations |
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