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Full-Text Articles in Life Sciences
Agroecological Factors Impacting Stem Borer (Lepidoptera: Crambidae) Dynamics In Gulf Coast Sugarcane And Rice, Julien M. Beuzelin
Agroecological Factors Impacting Stem Borer (Lepidoptera: Crambidae) Dynamics In Gulf Coast Sugarcane And Rice, Julien M. Beuzelin
LSU Doctoral Dissertations
Diatraea saccharalis (F.) and Eoreuma loftini (Dyar) are stem boring pests of sugarcane (Saccharum spp.) and rice (Oryza sativa L.) crops in the Gulf Coast region. Studies were conducted to determine the role of agroecological factors, including predator disruptions, alternate hosts, and crop phenological conditions, on stem borer populations.
The year after Hurricane Rita storm surge flooded sugarcane in Louisiana, a 71% reduction in the predaceous Solenopsis invicta Buren was recorded. Even with a 2.4-fold increase in the number of insecticide applications used for D. saccharalis management in flooded fields, growers still incurred higher injury.
In two field …
Ecology And Chemical Ecology Of Plant-Insect Interactions In Rice: Implications For Pest Management, Jason Charles Hamm
Ecology And Chemical Ecology Of Plant-Insect Interactions In Rice: Implications For Pest Management, Jason Charles Hamm
LSU Doctoral Dissertations
Induced resistance to the rice water weevil, Lissorhoptrus oryzophilus, was assessed in greenhouse and field experiments. The fall armyworm,Spodoptera frugiperda, and an elicitor, jasmonic acid, were used to induce resistance. The effect of these treatments on rice resistance to oviposition varied between cultivar used, but significantly fewer larvae were found on plants exposed to S. frugiperda and jasmonic acid on both cultivars tested. Application of jasmonic acid significantly reduced the number of L. oryzophilus larvae per plant, and represents the first example of elicitor-induced resistance in rice in field experiments. Oviposition by the sugarcane borer, Diatraea saccharalis, induced resistance to …