BREEDING FOR INSECT RESISTANCE IN SWEETPOTATO
| Autor: | J. R. Bohac, P.D. Dukes, J. M. Schalk |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | HortScience. 29:726e-726 |
| ISSN: | 2327-9834 0018-5345 |
| DOI: | 10.21273/hortsci.29.7.726e |
| Popis: | A two year study was conducted to evaluate the efficacy of insect resistance in sweetpotato cultivars from our breeding program in combination with an insecticide (fonofos) and/or a parasitic nematode (Steinernema carpocapsae). In the laboratory, use of the parasitic nematode resulted in 99% mortality of Diabrotica larvae. In both years, much higher control of damage by all insect classes was achieved by the use of resistant cultivars in combination with a nematode and/or fonofos treatment. Analysis of the first year's field data showed the parasitic nematode treatment gave good damage protection against the WDS (Wireworm, Diabrotica, Systena), sweetpotato flea beetle, but not grubs. In this same year, fonofos only gave good protection against WDS. In the second test year, fonofos gave good protection against WDS, but the nematode did not. High moisture conditions may have affected the efficacy of the parasitic nematode. Host plant resistance by sweetpotato cultivars appears to be less affected by variable field conditions and accounted for 64% of the total crop protection (compared to the check susceptible line). |
| Databáze: | OpenAIRE |
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