Topic
Samea multiplicalis
About: Samea multiplicalis is a research topic. Over the lifetime, 27 publications have been published within this topic receiving 428 citations.
Papers
TL;DR: Regardless of plant fertilizer level, the larvae fed at a rate 5–10 times greater than that of similar lepidopteran species consuming either low or high quality diets, suggesting that the S. multiplicalis larvae may be functioning at their biological limit for ingesting food.
Abstract: Compensatory responses of caterpillars fed low quality food include increased consumption and utilization of essential nutrients. Information about an insect's responses to nutritional challenges from their host plants could benefit weed biological control efforts in the selection and establishment of new agents. The target weed, Pistia stratiotes L. (Araceae) is a floating aquatic plant that has relatively low nitrogen levels which are further diluted with high water content. Efforts to establish the insect Spodoptera pectinicornis (Hampson) (Lepidoptera: Noctuidae) for biological control of P. stratiotes could benefit by examining the nutritional responses of a similar widely established lepidopteran species, Samea multiplicalis (Guenee) (Lepidoptera: Pyralidae). Larvae of this species were fed leaves of P. stratiotes plants that had been fertilized (NPK) at high and low rates. The leaves of the fertilized plants had a 4.3-fold increase in nitrogen (dry weight) and a 1.6-fold increase in water content. The results suggest that no compensatory increases occurred in larvae fed leaves from the low fertilized plants as no changes were found in fresh mass consumption or nitrogen utilization efficiency. Consequently, development time from second-third instars to pupation was delayed about 3 days compared with larvae fed the high nitrogen leaves. Furthermore, consumption of nitrogen was only 30% and its accumulation into larval tissues was only 60% compared with the larvae fed the high fertilized leaves. The resulting larvae had both a final biomass and a growth rate that were reduced by 40%. Regardless of plant fertilizer level, the larvae fed at a rate 5-10 times greater than that of similar lepidopteran species consuming either low or high quality diets, suggesting that the S. multiplicalis larvae may be functioning at their biological limit for ingesting food.
43 citations
TL;DR: Female Samea multiplicalis prefer to oviposit on Salvinia molesta plants of high nitrogen content, consequently, survival of first instar larvae is higher on plants with higher nitrogen content and larval survival is enhanced on plants damaged by C. salviniae.
Abstract: Female Samea multiplicalis prefer to oviposit on Salvinia molesta plants of high nitrogen content. Correspondingly, survival of first instar larvae is higher on plants with higher nitrogen content. When plants are low in nitrogen, the moth prefers to oviposit on plants grown in the sun to those grown in the shade. Ovipositing females also prefer undamaged plants to plants which have been damaged either by late-larval instars of S. multiplicalis or adults and larvae of the weevil Cyrtobagous salviniae. Few first instar larvae of S. multiplicalis survive on plants damaged by larger conspecific larvae but larval survival is enhanced on plants damaged by C. salviniae.
Zusammenfassung
Wirtspflanzenwahl bei der Eiablage von Samea multiplicalis Guenee (Lep., Pyralidae) in Abhangigkeit von Pflanzenqualitat und vorhandenen Frasschaden
Samea multiplicalis-Weibchen bevorzugen zur Eiablage Salvinia molesta-Pflanzen mit hohem Stickstoffgehalt. Dementsprechend ist die Uberlebensrate der L1 auf Pflanzen mit hohem Stickstoffgehalt groser. Bei einem geringen Stickstoffgehalt der Pflanzen werden zur Eiablage diejenigen Pflanzen, die in der Sonne wuchsen, denjenigen, die im Schatten wuchsen, vorgezogen. Weiterhin werden auf unbeschadigten Pflanzen mehr Eier abgelegt als auf solchen, die entweder einen Frasschaden von S. multiplicalis-Altlarven oder einen Kafer- bzw. Larvenfras von Cyrtobagous salviniae aufweisen. Einige S. multiplicalis-Larven des 1. Stadiums uberleben an Pflanzen, die durch Altraupen derselben Art befressen waren, jedoch ist die Uberlebensrate der Larven an solchen Pflanzen, an denen C. salviniae gefressen hat, groser.
23 citations
TL;DR: The results support earlier suggestions that damage by C. salviniae might improve the qualtity of the host plant for this herbivore.
Abstract: When adults and larvae of the weevil Cyrtobagous salviniae destroyed buds and tunnelled through rhizomes of Salvinia molesta, the plant responded by producting new growth which contained higher concentrations of nitrogen than in undamaged plants or in the older parent tissue of the same plant. Damage to leaves by the moth, Samea multiplicalis did not induce the same response. C. salviniae fed on the new growth and the higher nitrogen intake would have increased its reproductive capacity and enhanced its action as a biological control agent.Damage by both insects resulted in potassium leaching from the plant but no change in concentrations of phosphorus. The results support earlier suggestions that damage by C. salviniae might improve the qualtity of the host plant for this herbivore.
23 citations
TL;DR: The effect ofCyrtobagous salviniae, Samea multiplicalis, andPaulinia acuminata on the growth ofSalvinia molesta was assessed in relation to temperature in field cages at 2 sites in Brazil, a canal with running-water and a lagoon with stillwater.
Abstract: The effect ofCyrtobagous salviniae, Samea multiplicalis, andPaulinia acuminata on the growth ofSalvinia molesta was assessed in relation to temperature in field cages at 2 sites in Brazil, a canal with running-water and a lagoon with stillwater. Each insect species reduced the growth ofS. molesta over a mean leaftemperature range of 16–30°C, causing more damage as temperature increased. There was no difference between the 3 species in response to temperature. These results and their implication to the performance of these insects as biological control agents againstS. molesta are discussed.
15 citations
TL;DR: Sameodes albiguttalis (Warren), a South American pyralid species, has been released in the United States for biological control of waterhyacinth, Eichhornia crassipes (Mart.) Solms.
Abstract: Sameodes albiguttalis (Warren), a South American pyralid species, has been released in the United States for biological control of waterhyacinth, Eichhornia crassipes (Mart.) Solms., and is now well established in the Southeast. The egg, 5th instar, pupa, and adult are described and illustrated. The five S. albiguttalis larval instars are best separated by head capsule measurements and head color. Other lepidopterous larvae commonly found on waterhyacinth are usually other pyralids, noctuids, or arctiids. Another pyralid, Samea multiplicalis, is the only species easily confused with S. albiguttalis. The diagnostic characters useful for identifying S. albiguttalis include the dark orange head, the distinct pinacula, the distinct anal proleg plate, and the pale yellowish to cream body color.
10 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |
| 2012 | 1 |
| 2011 | 2 |
| 2008 | 1 |
| 2007 | 1 |
| 2000 | 1 |