scholarly journals Field Dodder: Life Cycle and Interaction with Host Plants

2020 ◽  
pp. 101-120
Author(s):  
Marija Sarić-Krsmanović
Keyword(s):  
Life Cycle ◽  
Host Plants

TUNGAU PADA DAUN MANGGA (Mangifera Indica)

2014 ◽  
Vol 13 (3) ◽  
Author(s):  
Rawati Panjaitan
Keyword(s):  
Life Cycle ◽  
Direct Observation ◽  
Host Plants ◽  
Body Shape ◽  
Leaf Surface ◽  
Mangifera Indica ◽  
Posterior Part ◽  
Mango Leaves

Mites have hostplant specifications or host plants. Mites can be destructive and deadly of which is the host plants a mango crop. Mites on mango crops will cause the leaves yellow and fall off prematurely. This is will lead to the disruption of the productivity of mango. It is necessary for research to identify the mites that infect the mango crop. The method is carried out by direct observation. Mites were taken from the surface of mango leaves later in preservation with several levels of concentration of alcohol, and polyvinyl laktofenol. Then, observed under a microscope and documented for identification purposes. Mites on the leaf surface of manalagi mango (<em>Mangifera indica</em>) found two species, it is <em>Oligonychus</em> sp. and <em>Oligonychus ilicis</em> (Family: Tetranychidae, Superfamily: Tetranychoidea). <em>Oligonychus</em> sp. hallmark is rounded body shape like a spider, with a body is transparent and there are two long seta on posterior part. While <em>Oligonychus ilicis</em> has a characteristic elongated rounded body shape, red, and there is a short posterior seta. <em>Oligonychus</em> sp. and <em>Oligonychus ilicis</em> live as parasites on the surface of mango leaves that can lead to wrinkled leaves, yellow and to fall. <em>Oligonychus</em> life cycle starts from the eggs develop into Nympha and then adult.

Pathogen life-cycle leaves footprint on the spatial distribution of recruitment of their host plants

2020 ◽  
Vol 47 ◽  
pp. 100974
Author(s):  
Antonio J. Perea ◽  
José L. Garrido ◽  
Jose M. Fedriani ◽  
Pedro J. Rey ◽  
Julio M. Alcántara
Keyword(s):  
Spatial Distribution ◽  
Life Cycle ◽  
Host Plants

Notes on rust fungi in China 8. Pucciniastrum tiliae life cycle and new host plants inferred from phylogenetic evidence

Mycotaxon ◽  
2020 ◽  
Vol 135 (3) ◽  
pp. 490-499
Author(s):  
Jing-Xin Ji ◽  
Zhuang Li ◽  
Yu Li ◽  
Makoto Kakishima
Keyword(s):  
Life Cycle ◽  
Northeast China ◽  
Host Plants ◽  
Phylogenetic Analyses ◽  
Rust Fungus ◽  
Rust Fungi ◽  
New Host ◽  
First Time

The life cycle connection between spermogonial and aecial stages of a rust fungus found on Abies holophylla and uredinial and telial stages on Tilia mongolica and T. mandshurica collected in northeast China were confirmed by phylogenetic analyses. The rust, identified as Pucciniastrum tiliae, was confirmed by morphological observations. The life cycle of this rust fungus is reported for the first time in China, and A. holophylla and T. mongolica represent new host plants for the species.

Mycology in the Canadian Arctic

ARCTIC ◽  
1963 ◽  
Vol 16 (1) ◽  
pp. 17 ◽  
Author(s):  
D.B.O. Savile
Keyword(s):  
Life Cycle ◽  
Host Plants ◽  
Canadian Arctic ◽  
Environmental Adaptations ◽  
Scientific Significance

Reviews studies of fungi north of the limit of spruce, and discusses arctic fungi characteristics and potential scientific significance. Environmental adaptations in reproduction, life cycle, dispersal, host plants, and morphology are described. Extensions in the known ranges of four species are noted.

scholarly journals New record of Common Owlet Moth Spirama helicina (Hubner, 1831) (Lepidoptera: Erebidae: Catocalinae) from Aligarh (Uttar Pradesh) with systematic account, distribution, host plants and biological control

2020 ◽  
Vol 1 (1) ◽  
pp. 37-41
Author(s):  
Akhlaq Husain ◽  
◽  
Wajid Hasan ◽  
Keyword(s):  
Biological Control ◽  
Life Cycle ◽  
New Record ◽  
Host Plants ◽  
Uttar Pradesh ◽  
Present Communication ◽  
Systematic Account ◽  
The Common

The present communication deals with the new record of Spirama helicina (Hubner, 1831), the Common Owlet Moth from Aligarh (Uttar Pradesh) and its systematic account, distribution, life cycle, host plants and biological control.

scholarly journals Duration of life-cycle of three parasitic hymenoptera on Saissetia oleαe (Bernard) growing on two different host plants.

2017 ◽  
Vol 3 ◽  
pp. 63
Author(s):  
M.V. Macropodi
Keyword(s):  
Life Cycle ◽  
Host Plants ◽  
Correlation Equation ◽  
Scale Insect ◽  
Nerium Oleander ◽  
The Third ◽  
Parasitic Hymenoptera ◽  
Third Stage ◽  
Release Area ◽  
The Mean

In this work the duration of the life-cycle of Metaphycus helvolus (Comp.) (parasite mainly on the third stage), Μetaphycus affinis stanley (Comp.) (parasite mainly on the third stage) and Μetaphycus lounsburyi (How.) (parasite mainly on the fourth stage) (Hymenoptera: Encyrtidae) on S. οleae, developed on different substrates, i.e. potato sprouts and plants of Nerium oleander, under laboratory conditions was determined. Among the Hymenoptera parasitizing S. oleae on Corfu, M, helvolus and M. lounsburyi, are of particular importance M. affinis stanley was introduced in Corfu in 1976 and despite the fact that the population of S. οleae in the release area was practically eliminated from other factors shortly after the release of the parasite, there is evidence that the parasite was finally established. The above parasites can be successfully reared on S. οleae developed both on potato sprouts and Nerium oleander. The study was carried out at 23±1°C, 65-70% R.H. and 12 hours of artificial light per day. For each species, 3 potato sprouts and three plants of Nerium oleander in pots infested with S. οleae were placed in each 60X30X40 cm cage. The host insects were oviposited in by adult parasites introduced into the cages and left there for two days. The number of emerging adult parasites in each cage was recorded daily (a total number of adults emerged per cage varied from 23 to 195) and the time taken for 50% emergence was calculated from the correlation equation by plotting the cumulative percentage of adults emerged against time. For M. helvolus the mean duration time of the life cycle was estimated to be 19.4 days on scales developed on potato sprouts and 15.1 days on scales developed on N. oleander. For M. affinis stanley the relevant estimates were 18.8 days and 23.4 days, respectively, while for M. lounsburvi the estimates were 21.3 and 18.6 days, respectively. For M. helvolus and M. lounsburyi the duration of the life cycle was shorter when the host insect developed on Nerium plants than on potato sprouts. For M. affinis stanley the reverse was true. These differences show the effect of the host of S. oleae on the time of development of the parasites, possibly reflecting the differences of the scale insect developed on different hosts as food quality for the parasites.

scholarly journals Synthesis and Evaluation of New Halogenated GR24 Analogs as Germination Promotors for Orobanche cumana

2021 ◽  
Vol 12 ◽  
Author(s):  
Yuchao Chen ◽  
Yi Kuang ◽  
Liyang Shi ◽  
Xing Wang ◽  
Haoyu Fu ◽  
...  
Keyword(s):  
Molecular Docking ◽  
Life Cycle ◽  
Seed Germination ◽  
Binding Affinity ◽  
Weed Control ◽  
Host Plants ◽  
Control Methods ◽  
Parasitic Weeds ◽  
Orobanche Cumana ◽  
Promising Agent

Orobanche and Striga are parasitic weeds extremely well adapted to the life cycle of their host plants. They cannot be eliminated by conventional weed control methods. Suicidal germination induced by strigolactones (SLs) analogs is an option to control these weeds. Here, we reported two new halogenated (+)-GR24 analogs, named 7-bromo-GR24 (7BrGR24) and 7-fluoro-GR24 (7FGR24), which were synthesized using commercially available materials following simple steps. Both compounds strongly promoted seed germination of Orobanche cumana. Their EC50 values of 2.3±0.28×10−8M (7BrGR24) and 0.97±0.29×10−8M (7FGR24) were 3- and 5-fold lower, respectively, than those of (+)-GR24 and rac-GR24 (EC50=5.1±1.32–5.3±1.44×10−8; p&lt;0.05). The 7FGR24 was the strongest seed germination promoter tested, with a stimulation percentage of 62.0±9.1% at 1.0×10−8M and 90.9±3.8% at 1.0×10−6M. It showed higher binding affinity (IC50=0.189±0.012μM) for the SL receptor ShHTL7 than (+)-GR24 (IC50=0.248±0.032μM), rac-GR24 (IC50=0.319±0.032μM), and 7BrGR24 (IC50=0.521±0.087μM). Molecular docking experiments indicated that the binding affinity of both halogenated analogs to the strigolactone receptor OsD14 was similar to that of (+)-GR24. Our results indicate that 7FGR24 is a promising agent for the control of parasitic weeds.

scholarly journals Contributions to the knowledge of the San José scale (Hemiptera, Coccomorpha, Diaspididae) in Poland

2020 ◽  
Vol 1 (89) ◽  
pp. 7-19
Author(s):  
Katarzyna Golan
Keyword(s):  
Life Cycle ◽  
Host Plants ◽  
Current Knowledge ◽  
Diagnostic Information ◽  
European Countries ◽  
San Jose ◽  
San Jose Scale ◽  
And Control

In recent years, an increase abundance and harmfulness of the San José scale (Comstockaspis perniciosa (Comstock, 1881) has been reported from many European countries. In Poland, C. perniciosa was not observed after 1948–1949, when it was first collected, until it was found again in 2015. It is considered as the most serious pest infecting many different species of plants worldwide. Basic diagnostic information for the San José scale and the key to identify similar diaspidid species recorded in Poland is provided. Current knowledge regarding the biology, host plants, distribution, and control, as well as information regarding the life cycle of C. perniciosa in Poland is summarized.

scholarly journals Biology of Corecoris dentiventris Berg, 1884 (Hemiptera, Coreidae) in tobacco culture (Nicotiana tabacum)

2000 ◽  
Vol 60 (1) ◽  
pp. 173-178 ◽  
Author(s):  
B.-H. C. CALDAS ◽  
L. R. REDAELLI ◽  
L. M. G. DIEFENBACH
Keyword(s):  
Life Cycle ◽  
Host Plants ◽  
Southern Brazil ◽  
Egg Viability ◽  
Rio Grande Do Sul ◽  
Porto Alegre ◽  
Abaxial Side ◽  
First Instar ◽  
Main Vein ◽  
Concise Description

Corecoris dentiventris Berg, 1884 (HEM., Coreidae) represents a pest in the tobacco culture in Southern Brazil. Nymphs and adults cause the wilting and twisting of the tobacco leaves due to their sucking habit. There are very few works about this species and these are restricted to concise description of the adult morphology, records of host plants and enumeration of injuries. The present investigation aims to study the life cycle of this bug. The experiment was carried out in a tobacco culture (Virginia type, var. K 326) implanted in the experimental area of the Departamento de Fitossanidade of the Universidade Federal do Rio Grande do Sul, in Porto Alegre, RS. The life cycle was studied in field conditions, in nylon cages, from egg clusters oviposited by females of the colonizing generation. The prefered oviposition site was the main vein in the abaxial side of the leaf. The average incubation period was 13.7 ± 0.04 days and the egg viability, 99.63%. The average periods of the different instars of the bug, in days, were: 5.4 ± 0.08, 9.7 ± 0.19, 4.5 ± 0.08, 5.3 ± 0.08, 9.0 ± 0.13 respectively for the first, second, third, fourth and fifth instars. The first instar presented the highest mortality (13.86%). The accumulated mortality of the nymphal phase was 35.29%. The sex ratio was 0.97 males : 1 female.

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