Topic
Cabbage looper
About: Cabbage looper is a research topic. Over the lifetime, 664 publications have been published within this topic receiving 16696 citations. The topic is also known as: Trichoplusia ni.
Papers published on a yearly basis
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Papers
TL;DR: The first successful establishment of a cell line derived from adult tissue of the cabbage looper, Trichoplusia ni, is reported, finding increasing use as a basis for conducting physiological and biochemical investigation outside the organism.
Abstract: CULTURED mammalian cells are finding increasing use as a basis for conducting physiological and biochemical investigation outside the organism. Insect cell lines have originated from primary explants of embryonic tissue or tissues from larval and pupal stages of the donor. Cells from primary explants of embryonic tissue from the fruit fly, Drosophila melanogaster; the mosquito, Aedes aegypti; leaf hoppers, Agallia constricta and A. quadripunctata; and cockroaches, Periplaneta americana and Blabera fusca, continued to multiply and were subcultured1–4. Primary cultures of larval tissues from, the silkworm, Bombyx mori; the rice stem borer, Chilo suppressalis; and mosquitoes, Aedes aegypti, A. albopictus and Anopheles stephensi, were subcultured and developed into cell lines5–11. Cells originating from pupal ovaries of the moth, Antheraea eucalypti, have also been established as a cell line12. This article reports the first successful establishment of a cell line derived from adult tissue of the cabbage looper, Trichoplusia ni.
588 citations
TL;DR: Because of interspecific differences in response to feeding deterrents and the lack of a strong relationship between EC50 and DC50 values, it is recommended to testing a battery of bioassay species with candidate compounds and the use of more than one bioassays.
Abstract: Antifeedant and growth inhibitory effects of crude plant extracts (Melia volkensii and Origanum vulgare) and pure allelochemicals (digitoxin, cymarin, xanthotoxin, toosendanin, thymol and trans-anethole) were investigated in the cabbage looper (Trichoplusia ni), and in the armyworm (Pseudaletia unipuncta) using different bioassays. Antifeedant effects of M. volkensii, O. vulgare and thymol were investigated in larvae of the diamondback moth (Plutella xylostella), and of O. vulgare and thymol in the Mexican bean beetle (Epilachna varivestis), using leaf disc choice bioassays. M. volkensii was the most potent growth inhibitor for T. ni and P. unipuncta (dietary EC 50 = 7.6 and 12.5 p.p.m., respectively) of all the test substances. Cymarin was the second most potent growth inhibitor (EC 50 = 132.0 p.p.m.) for T. ni. The most effective feeding deterrents for third instar T. ni larvae were xanthotoxin and M. volkensii (DC 50 = 0.9 and 8.3 μg/cm 2 , respectively). M. volkensii was also the most potent feeding deterrent for third instar P. unipuncta, P. xylostella and adult E. varivestis (DC 50 = 10.5, 20.7 and 2.3 μg/cm 2 , respectively). Because of interspecific differences in response to feeding deterrents and the lack of a strong relationship between EC 50 and DC 50 values, we recommend testing a battery of bioassay species with candidate compounds and the use of more than one bioassay. Based on their growth inhibitory and feeding deterrent properties, some of these plant extracts and pure allelochemicals have potential for use as alternative crop protectants against a number of pest species.
232 citations
TL;DR: It is reported that the resistance to the Bt toxin Cry1Ac in the cabbage looper, Trichoplusia ni, evolved in greenhouses, is associated with differential alteration of two midgut aminopeptidases N, APN1 and APN6, conferred by a trans-regulatory mechanism.
Abstract: The soil bacterium Bacillus thuringiensis (Bt) is the most successfully used biopesticide in agriculture, and its insecticidal protein genes are the primary transgenes used for insect control in transgenic crops. However, evolution of insect resistance to Bt toxins threatens the long-term future of Bt applications. To date, cases of resistance to Bt toxins have been reported in agricultural situations in six insect species, but the molecular basis for these cases of resistance remains unclear. Here we report that the resistance to the Bt toxin Cry1Ac in the cabbage looper, Trichoplusia ni, evolved in greenhouses, is associated with differential alteration of two midgut aminopeptidases N, APN1 and APN6, conferred by a trans-regulatory mechanism. Biochemical, proteomic, and molecular analyses showed that in the Cry1Ac-resistant T. ni, APN1 was significantly down-regulated, whereas APN6 was significantly up-regulated. The Cry1Ac resistance was correlated with down-regulation of APN1 but not with the up-regulation of APN6. The concurrent up-regulation of APN6 and down-regulation of APN1 might play a role in compensating for the loss of APN1 to minimize the fitness costs of the resistance. Along with identifying reduced expression of APN1 as the molecular basis of Bt resistance selected in an agricultural setting, our findings demonstrate the importance of APN1 to the mode of action of Bt toxin Cry1Ac.
203 citations
TL;DR: Larval bioassays showed that a factor present in the occlusion bodies of three distinct baculoviruses can cause specific biochemical and structural changes in the peritrophic membrane.
177 citations
TL;DR: Corn earworm and beet armyworm were most susceptible to fungal infection, and fall armyworm was least susceptible, and limited testing suggested low susceptibility of black cutworm and cabbage looper.
156 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 2 |
| 2024 | 6 |
| 2023 | 4 |
| 2022 | 20 |
| 2021 | 3 |
| 2020 | 4 |