scholarly journals POTENSI BEBERAPA JENIS TUMBUHAN LIAR SEBAGAI SUMBER INFESTASI HeUcoverpa armigera Hbn. PADA TANAMAN TEMBAKAU DELI

2020 ◽  
Vol 9 (2) ◽  
pp. 48
Author(s):  
. NURINDAH ◽  
. SUJAK
Keyword(s):  
Host Plants ◽  
Adult Stage ◽  
Tobacco Budworm ◽  
Wild Plants ◽  
Ageratum Conyzoides ◽  
Larval Population ◽  
Laboratory Activity ◽  
Mimosa Pigra ◽  
Field Activity ◽  
Survival And Reproduction

<p>Penelitian ketahanan hidup serangga hama pcmakan daun tembakau deli HeUcoverpa armigera (Ix'pidoplera: Noetuidac) dilakukan di pertanaman tembakau deli, Medan selama tahun 1999. Penelitian meliputi dua kegiatan. yailu kegiatan lapang dan laboratorium. Kegiatan lapang terdiri atas identifikasi dan padal populasi tumbuhan liar selama tidak ada petanaman tembakau deli (Agustusl)cscmbcr), seta pada padat populasi // armigera pada tumbuhan tersebul Penelitian laboratorium meliputi ketahanan hidup dan kcragaan reproduksi // armigera pada tumbuhan inang Selama tidak ada petanaman lembakau cerutu deli, serangga hama pcmakan daun ini bertahan hidup sedikitnya pada 10 spesies tumbuhan liar yang terdapat di sekitar lahan petanaman lembakau deli Pada umumnya, ketahanan hidup pada tumbuhan liar tersebut lebih rendah (30-70%) dibandingkan kalau hidup pada tanaman lembakau Walaupun larva //. armigera dapat menggunakan Ageratum conyzoides, Amaranthus spinosus. Mimosa pigra, dan M, pudica sebagai tanaman inangnya. tetapi serangga ini tidak dapal mencapai dewasa Pada tanaman Phylunthus amarus dan Euphorbia hirta. keperidian (masa reproduksi. fckunditas dan lertililas lelur yang dihasilkan) //. armigera lebih baik (masing-masing 1 190 dan 1 1 59 butir) danpada individu yang hidup pada tanaman tembakau (949 butir). tetapi fctililas telur yang dihasilkan lidak berbeda (masing-masing 84%) Pemanfaatan tumbuhan liar, terutama /.'. hirta, oleh //. armigera selama tidak ada petanaman tembakau deli berpotensi sebagai sumber infestasi hama ini pada tanaman tembakau deli pada musim tanam bcrikutnya.</p><p>Kata kunci: Tembakau deli, HeUcoverpa armigera, ketahanan hidup, tumbuhan liar</p><p> </p><p><strong>ABSTRACT </strong></p><p><strong>Potency of wild plants as infestation sources of Hclicoverpa armigera on deli tobacco plants </strong></p><p>Research on the survival of tobacco budworm HeUcoverpa armigera (l-epidoptcra: Noetuidac) was conducted in deli tobacco field, Medan, in 1999 The research consisted of ield and laboratory activities. Field activity was conducted by observing wild plants used by //. armigera for surviving during off-season of deli tobacco This activity included identiication of the plants, population density in the area and larval population on the plants Laboratory activity included the effects of the wild plants on the budworm survival and reproduction performance During off-season of deli tobacco. //. armigera survives on, al least, 10 species of wild plants surrounding the tobacco ield In general, the survival of //. armigera on the wild plants was lower (30-70%) than that on tobacco Although larvae of //. armigera used A. conyzoides, A. spinosus. M. pigra, and M. pudica as their host plants, the insect failed to reach adult stage. The use of P. amarus and E. hirta by //. armigera as host plants resulted in a higher fecundity (1 190 and 1 159 eggs, respectively) than those of tobacco (949 eggs), however the fetility of the eggs was not different (84%). The use of wild plants by //. armigera, especially E. hirta during off-season of deli tobacco could be a potential infestation source of the pest on tobacco ield in the next season.</p><p>Key words: Deli tobacco, HeUcoverpa armigera, survival rate, wild plants</p>

scholarly journals AGERATUM CONYZOIDES L. (PEMANFAATAN SEBAGAI OBAT DAN BIOAKTIVITASNYA)

2019 ◽  
Vol 11 (3) ◽  
pp. 197
Author(s):  
Marina Silalahi
Keyword(s):  
Fatty Acids ◽  
Secondary Metabolites ◽  
Traditional Medicine ◽  
Wild Plants ◽  
Ageratum Conyzoides ◽  
Comprehensive Information

ABSTRACTAgeratum conyzoides or badotan is a wild plants which uses as traditional medicine. This plant has a distinctive aroma similar to "the smell of goats" so it is called "goatweed". This article aims to explain the use of A. conyzoides as a drug and its bioactivity. The writing of this article is based on the study of literature obtained online and offline including various scientific articles then reviewed and synthesized so as to provide comprehensive information regarding the use of A. conyzoides as traditional medicine. In traditional medicine, Ageratum conyzoides is used as medicine for wounds, ulcers, and fever. Ageratum conyzoides have secondary metabolites such as terpenoids, flavonoids, steroids, terpenes, saponins, fatty acids, and alkaloids, with the main compounds stigmasterol and β-sitosterol. Bioactivity of A. conyzoides are antihistamine, antimicrobial, antiplasmodial, cytoprotective, analgesic, antioxidant and anti diabetes mellitus.Keywords: Ageratum conyzoides, antimicrobial, β-sitosterol, cytoprotective, analgesic. ABSTRAKAgeratum conyzoides atau badotan merupakan salah satu tumbuhan liar yang banyak dimanfaatkan sebagai obat tradisional. Tumbuhan ini memiliki aroma khas mirip dengan “bau kambing” sehingga disebut juga sebagai “goatweed”. Artikel ini bertujuan untuk menjelaskan pemanfaatan A. conyzoides sebagai obat dan bioaktivitasnya. Penulisan artikel ini didasarkan pada kajian literatur yang diperoleh secara online maupun offline meliputi berbagai artikel ilmiah kemudian dikaji dan disintesakan sehingga memberikan informasi yang kompehensif mengenai pemanfaatan A. conyzoides sebagai obat tradisional. Dalam pengobatan tradisional Ageratum conyzoides dimanfaatkan sebagai obat luka, bisul, dan demam. Ageratum conyzoides mengandung metabolit sekunder dari golongan terpenoid, flavonoid, steroid, terpen, senyawa, saponin, asam lemak, dan alkaloid, dengan senyawa utama stigmasterol dan β‐sitosterol. Bioaktivitas yang dimiliki oleh A. conyzoides antara lain sebagai anti histamin, antimikroba, antiplasmodial, sitoprotektif, analgesik, antioksidan dan anti diabetes mellitus.Kata Kunci : Ageratum conyzoides, antimikroba, β‐sitosterol, sitoprotektif, analgesik.

Diagnosing declining grassland wader populations using simple matrix models

2009 ◽  
Vol 59 (1) ◽  
pp. 127-144 ◽  
Author(s):  
Lia Hemerik ◽  
Chris Klok ◽  
Maja Roodbergen
Keyword(s):  
Growth Rate ◽  
Population Growth ◽  
Matrix Models ◽  
Population Growth Rate ◽  
Adult Stage ◽  
Demographic Data ◽  
Leslie Matrix ◽  
Adult Survival ◽  
Demographic Parameters ◽  
Survival And Reproduction

AbstractMany populations of wader species have shown a strong decline in number in Western-Europe in recent years. The use of simple population models such as matrix models can contribute to conserve these populations by identifying the most profitable management measures. Parameterization of such models is often hampered by the availability of demographic data (survival and reproduction). In particular, data on survival in the pre-adult (immature) stage of wader species that remain in wintering areas outside Europe are notoriously difficult to obtain, and are therefore virtually absent in the literature. To diagnose population decline in the wader species; Black-tailed Godwit, Curlew, Lapwing, Oystercatcher, and Redshank, we extended an existing modelling framework in which incomplete demographic data can be analysed, developed for species with a pre-adult stage of one year. The framework is based on a Leslie matrix model with three parameters: yearly reproduction (number of fledglings per pair), yearly pre-adult (immature) and yearly adult (mature) survival. The yearly population growth rate of these populations and the relative sensitivity of this rate to changes in survival and reproduction parameters (the elasticity) were calculated numerically and, if possible, analytically. The results showed a decrease in dependence on reproduction and an increase in pre-adult survival of the population growth rate with an increase in the duration of the pre-adult stage. In general, adult survival had the highest elasticity, but elasticity of pre-adult survival increased with time to first reproduction, a result not reported earlier. Model results showed that adult survival and reproduction estimates reported for populations of Redshank and Curlew were too low to maintain viable populations. Based on the elasticity patterns and the scope for increase in actual demographic parameters we inferred that conservation of the Redshank and both Curlew populations should focus on reproduction. For one Oystercatcher and the Black-tailed Godwit populations we suggested a focus on both reproduction and pre-adult survival. For the second Oystercatcher population pre-adult survival seemed the most promising target for conservation. And for the Lapwing populations all demographic parameters should be considered.

scholarly journals Broomrape Threat to Agriculture

2020 ◽  
Vol 31 (3) ◽  
pp. 141-145
Author(s):  
Diego Rubiales
Keyword(s):  
Chemical Control ◽  
Host Plants ◽  
Cultural Practices ◽  
Flowering Plants ◽  
Wild Plants ◽  
Defence Mechanisms ◽  
Natural Habitats ◽  
Agricultural Ecosystems ◽  
Economic Problems ◽  
New Crops

The broomrapes are plants that have modified their biology to feed on roots of other plants, emerging above the soil only to flower. There are about 150 broomrape species, most of which infect wild plants in natural habitats without causing economic problems. However, a few of them have adapted to agricultural ecosystems becoming troublesome root parasitic weeds. The most damaging ones are Orobanche cernua, O. crenata, O. cumana, O. minor, Phelipanche aegyptiaca and P. ramosa all of which severely constrain important dicot crops in Africa, Asia, and Europe. They are continuously extending to new areas, showing an ability to evolve thereby enlarging their host ranges, adapting to new areas and overcoming resistances introduced by the breeder. As flowering plants disseminated by seeds, broomrape distribution and management (containment, sanitation, cultural practices, and biological and chemical control) fall under the purview of weed science. However, broomrapes differ from standard weeds as they behave as pathogens that attach to host roots to feed on them. As for any other disease, the host plants might protect themselves by defence mechanisms that can be selected by plant breeders to develop resistant cultivars. In spite of these efforts, rather than being contained, the broomrape threat is increasing, not only extending to new suitable areas but also adapting genetically to infect new crops and to increase virulence.

scholarly journals Identification and Expression Patterns of Opsin Genes in a Forest Insect, Dendrolimus punctatus

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 116
Author(s):  
Sufang Zhang ◽  
Xiangbo Kong ◽  
Fu Liu ◽  
Zhen Zhang
Keyword(s):  
Adult Stage ◽  
Vision System ◽  
Expression Patterns ◽  
Coniferous Forest ◽  
Light Response ◽  
Insect Vision ◽  
Long Wavelength ◽  
Development Stages ◽  
Opsin Genes ◽  
Survival And Reproduction

Dendrolimus punctatus walker (Lepidoptera: Lasiocampidae) is the most serious coniferous forest defoliator in China. This species has long life history, and shows different activity rhythms and light response behaviors at larval and adult stages. Insect vision system play important roles for survival and reproduction, and disturbance of photoreception may help us to control this pest. However, we know little about the visual system of D. punctatus. As opsins are the most important genes determining photoreceptor sensitivity of insects, we identified opsins of D. punctatus and analyzed their expression patterns at different development stages in this study. Four opsin genes were identified based on our transcriptome data. Phylogenetic analysis showed that there are three classical ultraviolet (UV), blue, and long-wavelength (LW) light sensitive opsin genes, and another UV-like opsin as homolog of a circadian photoreceptor, Rh7, in Drosophila melanogaster and other insects. Expression analysis indicated that the UV and UV-like opsins expression levels only fluctuated slightly during whole life stages of D. punctatus, while Blue and LW opsins were up-regulated many times at adult stage. Interestingly, the ratio of UV-opsin was much higher in eggs and larvae stages, and lower in pupa and adult stages; reversely, LW-opsin showed extremely high relative ratio in pupa and adult stages. High expression level of LW opsin in the adult stage may correlate to the nocturnal lifestyles of this species at adult stage, and different ratios of UV and LW opsins in larval and adult stages may help to explain the different visual ecologies of these two development stages of D. punctatus. This work is the foundation for further research of opsin functions and vision mechanisms of D. punctatus.

The Tobacco Budworm on St. Croix, U. S. Virgin Islands: Host Plants, Population Survey and Estimates

1974 ◽  
Vol 57 (3) ◽  
pp. 297 ◽  
Author(s):  
J. Wendell Snow ◽  
W. W. Cantelo ◽  
A. H. Baumhover ◽  
J. L. Goodenough ◽  
H. M. Graham ◽  
...  
Keyword(s):  
Host Plants ◽  
Population Survey ◽  
Virgin Islands ◽  
Tobacco Budworm

scholarly journals Host plants of root-knot nematodes

1975 ◽  
Vol 32 (0) ◽  
pp. 527-530
Author(s):  
Luiz Gonzaga E. Lordello ◽  
Luiz Carlos Fazuoli ◽  
Condorcet Aranha ◽  
Rubens R.A. Lordello
Keyword(s):  
Coffea Arabica ◽  
Host Plants ◽  
Coffea Canephora ◽  
Weed Species ◽  
Ageratum Conyzoides ◽  
Digitaria Sanguinalis ◽  
Bidens Pilosa ◽  
Root Knot Nematodes ◽  
Eleusine Indica ◽  
Solanum Americanum

Root-knot nematodes were found attacking Coffea spp. and also roots of a few weed species usually found in the coffee orchards in São Paulo. C. arabica cv. Catuaí, C. arabica cv. Mundo Novo, Timor Hybrid and a few plants of C. racemosa showed to be susceptible to Meloidogyne exigua. Roots of Ageratum conyzoides, Amaranthus viridis, Bidens pilosa, Coffea arabica cv. Mundo Novo, Coffea racemosa, Commelina virginica, Digitaria sanguinalis, Galinsoga parviflora, Gnaphalium spathulatum, Porophyllum ruderale, Portulaca oleracea, Pterocaulon virgatum and Solanum americanum were disfigured by M. incognita M. arenaria was found attacking roots of Eleusine indica and Gnaphalium spathulatum, and the presence of an unidentified Meloidogyne species was verified in roots of the following species: Vernonia ferruginea, C. arabica x C. canephora, Eupatorium pauciflorum, Coffea canephora cv. Kouillou, Coffea eugenioides, Coffea racemosa, Coffea stenophylla, Euphorbia pilullifera, Solanum americanum, Ageratum conyzoides, Phyllanthus corcovadensis, and Emilia sagittata.

scholarly journals Antagonistic Interactions Between Fusaria Species and Their Host Plants Are Influenced by Host Taxonomic Distance: A Case Study From Mexico

2021 ◽  
Vol 9 ◽  
Author(s):  
Julieta Benítez-Malvido ◽  
Gerardo Rodríguez-Alvarado ◽  
Mariana Álvarez-Añorve ◽  
Luis D. Ávila-Cabadilla ◽  
Ek del-Val ◽  
...  
Keyword(s):  
Plant Species ◽  
Fungal Pathogens ◽  
Spatial Ecology ◽  
Host Plants ◽  
Rapid Assessment ◽  
Trophic Relationships ◽  
Wild Plants ◽  
Cultivated Plants ◽  
Economic Implications ◽  
Antagonistic Interactions

Interactions between cultivated and wild plants with their fungal pathogens have strong ecological, evolutionary and economic implications. Antagonistic interactions, however, have been scantily studied in an applied context by using ecological networks, phylogeny and spatial ecology concurrently. In this study, we describe for the first time, the topological structure of plant-fungi networks involving species of the genus Fusarium and their native and introduced (exotic) cultivated host plants in Mexico. For this, we based our study on a recent database describing the attack on 75 native and introduced plant species, including 35 species of the genus Fusarium. Host plant species varied in their degree of phylogenetical relatedness (Monocots and Dicots) and spatial geographical distribution. Therefore, we also tested whether or not plant-Fusarium networks are phylogenetically structured and highlighted the spatial correlation between pathogens and their host plants across the country. In general, the pathogen-plant network is more specialized and compartmentalized in closely related taxa. Closely related hosts are more likely to share the same pathogenic Fusarium species. Host plants are present in different ecosystems and climates, with regions having more cultivated plant species presenting the highest number of fusaria pathogens. From an economic standpoint, different species of the same taxonomic family may be more susceptible to being attacked by the same species of Fusarium, whereas from an ecological standpoint the movement of pathogens may expose wild and cultivated plants to new diseases. Our study highlights the relevance of interaction intimacy in structuring trophic relationships between plants and fusaria species in native and introduced species. Furthermore, we show that the analytical tools regarding host distribution and phylogeny could permit a rapid assessment of which plant species in a region are most likely to be attacked by a given fusaria.

scholarly journals Identification of the Differences in Olfactory System Between Male and Female Oriental Tobacco Budworm Helicoverpa assulta 

2020 ◽  
Author(s):  
Haichao Li ◽  
Weizheng Li ◽  
Changjian Miao ◽  
Gaoping Wang ◽  
Man Zhao ◽  
...  
Keyword(s):  
Olfactory System ◽  
Binding Proteins ◽  
Tobacco Budworm ◽  
Helicoverpa Assulta ◽  
Male And Female ◽  
Mate Search ◽  
Pheromone Identification ◽  
Survival And Reproduction ◽  
Odorant Binding ◽  
Whole Transcriptome

Abstract Background: The olfactory system of insects facilitates their search for host and mates, hence it plays an essential role for insect survival and reproduction. Insects recognize odor substances through olfactory neurons and olfactory genes. Previous studies showed that there are significant sex-specific differences in how insects identify odorant substances, especially sex pheromones. However, whether the sex-specific recognition of odorant substances is caused by differences in the expression of olfaction-related genes between males and females remains unclear. Results: In order to clarify this problem, the whole transcriptome sequence of the adult Helicoverpa assulta, an important agricultural pest of tobacco and other Solanaceae plants, was obtained using PacBio sequencing. RNA-seq analysis showed that there were 27 odorant binding proteins (OBPs), 24 chemosensory proteins (CSPs), 4 pheromone-binding proteins (PBPs), 68 odorant receptors (OR) and 2 sensory neuron membrane proteins (SNMPs) genes that were expressed in the antennae of male and female H. assulta. Females had significantly higher expression of GOBP1-like, OBP, OBP3, PBP3 and SNMP1 than males, while males had significantly higher expression of GOBP1, OBP7, OBP13, PBP2 and SNMP2. Conclusions: Our findings improve our understanding of olfactory genes in H. assulta, and can be used to further study pheromone identification, mate search, and sex differences in an insect’s ability to search for hosts. These results improve our understanding of mate search and host differentiation in H. assulta.

scholarly journals Diversity and Host Plants of Tephritidae From Two Islands of the Comoro Archipelago (Grande-Comore and Moheli).

2021 ◽  
Author(s):  
KASSIM Bakar ◽  
Turgay ÜSTÜNER
Keyword(s):  
Host Plants ◽  
Prunus Persica ◽  
Fruit Fly ◽  
Fruit Flies ◽  
Bactrocera Dorsalis ◽  
Wild Plants ◽  
Wild Plant ◽  
New Host ◽  
Grande Comore ◽  
Fruit Plants

Abstract This paper summarizes the different host plants and fruit flies present in two islands (Grande-Comore and Mohéli) of the Comoros Archipelago. Different exotic and wild fruit plants were sampled. Eighty plant species, potential hosts, belonging to thirty-four families were collected and incubated for the emergence of fruit flies from December 2019 to September 2020. Twenty-five plant hosts from ten families comprising cultivated and wild fruits have been identified. Fruit fly infestation rates per kilogram of fruit (T.Kg-1 ) varied from plant to plant. Exotic fruit plants, which accounted for more than half of infested plants, including Cucumis melo, Cucurbita pepo, Prunus persica, Coffea arabica and Capsicum frutescens had high infestation rates. For wild plants, the highest infestation rates have been observed in some families including Combretaceae, Cucurbitaceae, Solanaceae and Vitaceae. The highest infestation rate per kilogram of fruit was observed in a wild plant: Cyphostemma lageniflorum. Thirteen new host plants infested by Tephritidae are reported and/or listed for the first time in Comoros. In total, eight species of fruit flies identified. However, the species Bactrocera dorsalis Hendel, 1912 (47.5%) and Dacus bivittatus (Bigot, 1858) (37.6%) were the most representative of the Tephritidae that emerged.

scholarly journals A Method for a Long-Term Marking of Spotted Lanternfly (Hemiptera: Fulgoridae) Using a Stable Isotope of Nitrogen

2020 ◽  
Vol 49 (4) ◽  
pp. 993-997
Author(s):  
Mitzy F Porras ◽  
Tomás López-Londoño ◽  
John Rost ◽  
David Biddinger ◽  
Dennis Calvin ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Host Plants ◽  
Adult Stage ◽  
Economic Damage ◽  
Dispersal Patterns ◽  
Food Web Structure ◽  
Ecological Processes ◽  
Web Structure ◽  
Lycorma Delicatula

Abstract Developing a lifelong marking method for Lycorma delicatula (White, 1845) is crucial to investigate ecological processes. Here we validate a marking method using stable isotope enrichment (15N) of host plants to track spotted lanternfly (SLF), an invasive species causing economic damage on grapes, hardwood forest and landscape tree species. To validate this method, we first determined the isotope dosage to be sprayed on the host plants and subsequently detected in SLF. Second, we examined whether 15N mark remains detectable from the nymphal to adult stage. We demonstrated that two stable isotope dosages applied to the host plants were assimilated by the insect and equally detectable in the exoskeleton, wings, and mature eggs ready to be oviposited. This safe and reliable method can be used to examine fundamental processes of the biology and ecology of SLF that range from dietary resources and resource allocation to food-web structure and dispersal patterns.

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