A new approach to the physiological host plant-parasite relationship — A technique in the field of applied entomology

1967 ◽  
Vol 73 (5-6) ◽  
pp. 165-169 ◽  
Author(s):  
J. J. H. Storms ◽  
P. Harrewijn ◽  
J. Ph. W. Noordink
Keyword(s):  
Host Plant ◽  
New Approach ◽  
Plant Parasite ◽  
Parasite Relationship

scholarly journals Effect of Host Plants and Potting Mixture on Growth of Sandalwood Seedlings at Nursery Stage

2021 ◽  
Vol 10 (9) ◽  
pp. 545-549
Author(s):  
Shubhashree Sahu V. Maheswarappa ◽  
Ramakrishna Hegde N. Kencharaddi ◽  
B. N. Sathish
Keyword(s):  
Host Plant ◽  
Large Scale ◽  
Growth Parameters ◽  
Santalum Album ◽  
Planting Stock ◽  
Parasite Relationship ◽  
Aromatic Species ◽  
Collar Diameter ◽  
Host Parasite ◽  
Santalum Album L

Sandalwood (Santalum album L.) is one of the most valuable commercially cultivated aromatic species throughout the world. However, the availability of quality planting stock isthe current bottleneck in its establishment on large scale. The major problems, noticed during quality planting stock production in nurseries are scarce knowledge about host-parasite relationship and use of appropriate potting mixture apart from its seed germination. In this regard two experiments were carried out at the College of Forestry, Ponnampet during 2020-2021 to identify suitable host plant and potting mixture. Growth parameters were recorded after 90, 180 and 270 days of transplanting sandal seedlings into treatments. After 270 days of transplanting, the host plant A. lebbeck recorded higher survival of sandal seedlings (81.89 %) and the host plant C. junghuhniana had higher height growth (10.40 cm) with collar diameter 2.33mm. Potting mixture sand, soil, vermicompost, G. intraradices with C. Junghuhninana found effective for height (18.25 cm) and collar diameter (2.58 mm).

scholarly journals Septorioza pomidora. I. Rozwój choroby w warunkach szklarniowych i polowych [Septoria leaf spot of tomato. I. Development of septoria leaf spot on tomato plants under greenhouse and field conditions]

2015 ◽  
Vol 30 (2) ◽  
pp. 341-358 ◽  
Author(s):  
J. Marcinkowska
Keyword(s):  
Host Plant ◽  
Leaf Spot ◽  
Field Conditions ◽  
Air Humidity ◽  
Inoculum Concentration ◽  
Tomato Plants ◽  
Central Poland ◽  
Plant Parasite ◽  
Septoria Lycopersici ◽  
Septoria Leaf Spot

The number of <i>Septoria lycopersici</i> pycnospores necessary for inducing tomato infection was reported. In addition to this, the influence of inoculum concentration and site of tomato infection as well as the influence of air humidity and temperature on diseasee expression have been researched. Studies upon the character of <i>S. lycopersici</i> penetration and host-plant parasite interaction were made with the susceptible Bounty tomato under greenhouse conditions. The results of observations concerning the appearance and development of septoria leaf spot in the fields of central Poland were also described.

scholarly journals The Influence of Acacia Parasite Filtrate as Bioinsecticide for Bagworms (Methane Plana)

2020 ◽  
Vol 11 (1) ◽  
pp. 58-65
Author(s):  
Makmun Murod ◽  
Cicik Ainurrohmah ◽  
Hayatin Nufus
Keyword(s):  
Experimental Study ◽  
Host Plant ◽  
Design Method ◽  
Test Results ◽  
Anova Test ◽  
Plant Parasite ◽  
Randomized Design ◽  
Completely Randomized Design

Dendrophthoe pentandra is a plant parasite that can be detrimental to the host plant and attacks various types of trees, such as acacia. The purpose of this study was to examine the effects and determine the concentration of acacia parasite filtrate on bagworms. This research was an experimental study which used 0%, 20%, 40%, 60%, 80%, and 100% parasite filtrate concentrations. The study employed the Completely Randomized Design method with ANOVA as the method of analysis. Based on the results of phytochemical tests, the parasite filtrate contained alkaloids, flavonoids, saponins, triterpenoids, phenolics, and tannins. The ANOVA test results showed that the concentration of acacia parasite filtrate affected the mortality of the bagworms. Furthermore, based on Duncan's test, the most effective concentrations to be applied were 80%, 60%, and 100%.

A plant parasite uses light cues to detect differences in host‐plant proximity and architecture

2020 ◽  
Author(s):  
Jason D. Smith ◽  
Beth I. Johnson ◽  
Mark C. Mescher ◽  
Consuelo M. De Moraes
Keyword(s):  
Host Plant ◽  
Plant Parasite

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Processing Immunoperoxidase Labeled Cell Monolayers and Cryostat Sesctions For Electron Microscopy

1985 ◽  
Vol 43 ◽  
pp. 714-715
Author(s):  
K. Chien ◽  
R. Van de Velde ◽  
I.P. Shintaku ◽  
A.F. Sassoon
Keyword(s):  
Cell Monolayer ◽  
Cell Types ◽  
Surface Antigens ◽  
Immunoperoxidase Method ◽  
Reaction Step ◽  
Hot Plate ◽  
Air Drying ◽  
New Approach ◽  
Cell Monolayers ◽  
Glass Slides

Immunoelectron microscopy of neoplastic lymphoma cells is valuable for precise localization of surface antigens and identification of cell types. We have developed a new approach in which the immunohistochemical staining can be evaluated prior to embedding for EM and desired area subsequently selected for ultrathin sectioning.A freshly prepared lymphoma cell suspension is spun onto polylysine hydrobromide- coated glass slides by cytocentrifugation and immediately fixed without air drying in polylysine paraformaldehyde (PLP) fixative. After rinsing in PBS, slides are stained by a 3-step immunoperoxidase method. Cell monolayer is then fixed in buffered 3% glutaraldehyde prior to DAB reaction. After the DAB reaction step, wet monolayers can be examined under LM for presence of brown reaction product and selected monolayers then processed by routine methods for EM and embedded with the Chien Re-embedding Mold. After the polymerization, the epoxy blocks are easily separated from the glass slides by heatingon a 100°C hot plate for 20 seconds.

TEM study of a biofilm on copper corrosion

1996 ◽  
Vol 54 ◽  
pp. 220-221
Author(s):  
W. A. Chiou ◽  
N. Kohyama ◽  
B. Little ◽  
P. Wagner ◽  
M. Meshii
Keyword(s):  
Marine Bacterium ◽  
Culture Medium ◽  
Copper Alloys ◽  
Pure Copper ◽  
Localized Corrosion ◽  
Natural Seawater ◽  
Copper Corrosion ◽  
New Approach ◽  
The Past ◽  
Copper Tolerant

The corrosion of copper and copper alloys in a marine environment is of great concern because of their widespread use in heat exchangers and steam condensers in which natural seawater is the coolant. It has become increasingly evident that microorganisms play an important role in the corrosion of a number of metals and alloys under a variety of environments. For the past 15 years the use of SEM has proven to be useful in studying biofilms and spatial relationships between bacteria and localized corrosion of metals. Little information, however, has been obtained using TEM capitalizing on its higher spacial resolution and the transmission observation of interfaces. The research presented herein is the first step of this new approach in studying the corrosion with biological influence in pure copper.Commercially produced copper (Cu, 99%) foils of approximately 120 μm thick exposed to a copper-tolerant marine bacterium, Oceanospirillum, and an abiotic culture medium were subsampled (1 cm × 1 cm) for this study along with unexposed control samples.

High resolution at low voltage: A new approach

1989 ◽  
Vol 47 ◽  
pp. 76-77
Author(s):  
Arthur V. Jones
Keyword(s):  
Low Voltage ◽  
Emission Sources ◽  
New Approach ◽  
Design Concepts ◽  
Probe Diameter ◽  
Low Voltage Operation ◽  
Sufficient Intensity ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Immersion Type

With the introduction of field-emission sources and “immersion-type” objective lenses, the resolution obtainable with modern scanning electron microscopes is approaching that obtainable in STEM and TEM-but only with specific types of specimens. Bulk specimens still suffer from the restrictions imposed by internal scattering and the need to be conducting. Advances in coating techniques have largely overcome these problems but for a sizeable body of specimens, the restrictions imposed by coating are unacceptable.For such specimens, low voltage operation, with its low beam penetration and freedom from charging artifacts, is the method of choice.Unfortunately the technical dificulties in producing an electron beam sufficiently small and of sufficient intensity are considerably greater at low beam energies — so much so that a radical reevaluation of convential design concepts is needed.The probe diameter is usually given by

New approach to drawing in dental anatomy

1968 ◽  
Vol 32 (3) ◽  
pp. 279-282
Author(s):  
JI Mock ◽  
JW Grenfell ◽  
WA Richter
Keyword(s):  
New Approach ◽  
Dental Anatomy
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