Multiple Infestations Induce Direct Defense of Maize to Tetranychus urticae (Acari: Tetranychidae)
| Autor: | Mayara Loss Franzin, Jéssica Mayara Coffler Botti, Simone Martins Mendes, Marcos Antonio Matiello Fadini, Júlio Onésio Ferreira Melo |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
genetic structures Population medicine.disease_cause complex mixtures 010603 evolutionary biology 01 natural sciences Spider mite Bacillus thuringiensis parasitic diseases Infestation medicine Mite Acari Tetranychus urticae education Ecology Evolution Behavior and Systematics education.field_of_study integumentary system biology fungi biology.organism_classification 010602 entomology Horticulture Insect Science Fall armyworm |
| Zdroj: | Florida Entomologist. 103 |
| ISSN: | 0015-4040 |
| Popis: | Plants present constitutive or induced defense mechanisms against herbivory. In addition, studies show that there are interactions between these different defense mechanisms when multiple species infestations occur. This study investigated the interaction between maize defensive mechanisms to control two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) under single and double species infestations with this spider mite and fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae). The experiment was carried out in a greenhouse with the following treatments: uninfested Bt (Bacillus thuringiensis Berliner; Bacillaceae) and conventional maize, single infestation with spider mite on Bt and conventional maize, and both maize types with infestations of spider mite and fall armyworm. Two d after infestation, all treatments were re-infested with spider mite. The number of eggs, immatures, and adult females (alive and dead) were recorded for re-infested populations. In addition, a leaf sample was taken from all maize plants for spectrometric analysis. There was no significant difference of biological variables of spider mite between Bt and conventional plants, as well as the ones from pre-infested and non-infested plants. The same chemical pattern of ions was observed on plants in these 4 groups. In the conventional pre-infested plants with spider mite and fall armyworm, the population of re-infested mite showed reduced survival and fertility. Defensive compounds detected were HMBOA-Glc, Linoleoyl-GPI, and kaempferol rutinose. It was suggested that there is direct induced defense against spider mite in conventional maize in multiple infestations with spider mite and fall armyworm. |
| Databáze: | OpenAIRE |
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