STP® AS AN ADHESIVE ON TRAPS USED TO MONITOR FOR ALATE GREEN PEACH APHIDS, MYZUS PERSICAE (SULZER) (HOMOPTERA: APHIDIDAE)

1988 ◽  
Vol 120 (12) ◽  
pp. 1059-1061
Author(s):  
B.D. Frazer ◽  
R.S. Vernon
Keyword(s):  
Myzus Persicae ◽  
Unit Area ◽  
Water Traps ◽  
Green Peach Aphids

AbstractA cardboard trap, painted yellow and coated with STP® oil treatment, was more efficient in trapping Myzus persicae (Sulzer) than water traps using Stickem®. STP-coated traps were more selective than Stickem-coated traps for small insects and caught more aphids per unit area than did water traps. Aphids were identified in situ on STP traps more quickly than from water traps or traps coated with Stickem.

scholarly journals Diversité et abondance des pucerons [Homoptera : Aphididae] et leur impact sur la dissémination des virus infectant la pomme de terre au Mali

2014 ◽  
Vol 94 (1) ◽  
pp. 1-7
Author(s):  
Almouner A.A. Yattara ◽  
Amadou K. Coulibaly ◽  
Frédéric Francis
Keyword(s):  
Potato Virus ◽  
Myzus Persicae ◽  
Aphis Gossypii ◽  
Leaf Roll ◽  
Potato Leaf Roll Virus ◽  
Potato Leaf ◽  
Pomme De Terre

Des études sur l’abondance et la diversité des pucerons ont été menées pendant trois campagnes agricoles au Mali. Sur la base de relevés de bacs jaunes installés dans des cultures de pomme de terre à Kati et à Sikasso, 2 525 pucerons ont été capturés et identifiés. Dix-neuf espèces de pucerons ont été recensées, dont deux qui ont été observéesin situsur la culture :Aphis gossypii(Glover) etMyzus persicae(Sulzer). La plupart de ces espèces sont des ravageurs de cultures et elles contribuent également à la transmission virale. Des échantillons foliaires prélevés dans des parcelles de pomme de terre dans les deux régions ont été testés par la technique ELISA pour la détection des deux principaux virus dommageables, soit lePotato VirusY (PVY) et lePotato Leaf Roll Virus(PLRV). Le taux de plantes virosées dans les deux localités pendant les trois années variait de 19,3 % à 21,8 % pour le PVY, alors qu’il était de 8,5 % à 9,3 % pour le PLRV. L’occurrence de ces maladies virales s’est révélée être très homogène d’une année à l’autre, avec des taux relativement importants. Cette étude est une première quantification dans cette région du Mali de l’importance des relations pucerons vecteurs–virus en culture de pomme de terre.

Kinetics of the reactive spreading of molten aluminum on ceramic surfaces

1995 ◽  
Vol 10 (3) ◽  
pp. 640-650 ◽  
Author(s):  
Douglas A. Weirauch ◽  
Willy M. Balaba ◽  
Anthony J. Perrotta
Keyword(s):  
Molten Aluminum ◽  
Unit Area ◽  
Triple Line ◽  
Temperature Analysis ◽  
Experimental Conditions ◽  
Ceramic Surfaces ◽  
Main Effect ◽  
Kinetics Of ◽  
Rate Of Movement

The spreading kinetics of molten aluminum on ceramic surfaces bearing reactive coatings has been studied through the direct observation of sessile drops, either formed in situ or emplaced at temperature. Analysis of videotapes permitted the assessment of the rate of advance of rapidly spreading droplets. Experimental conditions in this study were chosen to avoid the severe retarding effect of the aluminum oxide film which is typically encountered in aluminum wetting experiments. A variety of reactive coating systems were examined (B, Cu, Ni, Ti, and Ti + B), and the effect of coating amount was assessed. Based upon the experiments of this study, the main effect of the coatings is to drive spreading due to strong exothermic interfacial reactions. The intensity of the interfacial reaction causes the change in free energy per unit area of interface to dominate the rate of movement of the triple line.

Autoradiographic Evidence For The In Situ Synthesis Of Chloroplast And Mitochondrial Rna

1968 ◽  
Vol 3 (3) ◽  
pp. 327-340
Author(s):  
SARAH P. GIBBS
Keyword(s):  
Chloroplast Development ◽  
Unit Area ◽  
Mitochondrial Rna ◽  
Cell Component ◽  
Electron Microscope Autoradiography ◽  
Mitochondrial Ribosomes ◽  
Ochromonas Danica ◽  
Microscope Autoradiography ◽  
Cytoplasmic Ribosomes

The rate of appearance of labelled RNA in the chloroplast and mitochondria as compared with the rate in the remaining cytoplasm was studied in the unicellular flagellate, Ochromonas danica, by electron-microscope autoradiography. Greening cells were labelled with uridine-5,6[3H] for a short (30 min) and a long (2 h) interval and the concentration of label, expressed as grains/unit area, determined for each cell component. The data demonstrate that there is the expected lag in the labelling of the cytoplasm proper, but no apparent lag in the labelling of the chloroplast and mitochondria. This observation, combined with the fact that after the short labelling time the chloroplast and mitochondria have a much heavier concentration of labelled RNA than the surrounding cytoplasm, indicates that most, if not all, chloroplast and mitochondrial RNA is synthesized in situ. The three kinds of ribosomes present in the cell are distinctly different in size. The mitochondrial ribosomes measure 150-170 Å in diameter, the chloroplast ribosomes average 170-200 Å in diameter, whereas the cytoplasmic ribosomes are 210-230 Å in diameter in glutaraldehyde-osmium-fixed cells. During chloroplast development in the light, the number of chloroplast ribosomes increases approximately tenfold.

Some factors influencing variability in water-trap catches of Tipula spp. (Diptera: Tipulidae)

1983 ◽  
Vol 73 (4) ◽  
pp. 693-699 ◽  
Author(s):  
R. P. Blackshaw
Keyword(s):  
Northern Ireland ◽  
Unit Area ◽  
Colour Preference ◽  
Water Trap ◽  
Factors Influencing ◽  
Water Traps ◽  
The Mean ◽  
Trap Catches

AbstractExperiments were undertaken in July and August 1982 in Northern Ireland to examine the effects of some factors which could influence the number of craneflies caught by water traps. Tipula paludosa Mg. and T. oleracea L. were caught, but the latter only in small numbers. Catches of males of T. paludosa, but not of females, decreased as the height of the trap walls increased. All catches were larger in traps of greater diameter. A significant colour preference was found for males of T. paludosa, in the order green > red > yellow > white > blue > black. Increasing the number of traps per unit area increased the mean catch per trap. It is concluded that the attraction of traps for craneflies, if any, is only slight and that the insects may descend randomly over traps so that greater numbers are caught in wide, low-walled traps. Catch is possibly greatest in green traps because of an inability of craneflies to distinguish them from grass.

Carbon inputs by wheat and vetch roots to an irrigated Vertosol

Soil Research ◽  
2012 ◽  
Vol 50 (3) ◽  
pp. 177 ◽  
Author(s):  
N. R. Hulugalle ◽  
T. B. Weaver ◽  
L. A. Finlay
Keyword(s):  
Unit Area ◽  
New South ◽  
Farming Systems ◽  
Triticum Aestivum L ◽  
Root Mortality ◽  
Root Carbon ◽  
South Wales ◽  
Wheat Stubble ◽  
Experimental Treatments

Research on the amounts of carbon that can be added to Vertosols of New South Wales and Queensland by crop roots in irrigated cotton farming systems is sparse. The objective of this study was to determine the amounts of carbon added to soil by roots of wheat (Triticum aestivum L.) and purple vetch (Vicia benghalensis L.) sown in rotation with irrigated cotton (Gossypium hirsutum L.). Measurements were made from 2008 to 2010 in an ongoing experiment near Narrabri, northern NSW, using a combination of soil cores and minirhizotron observations. The experimental treatments were: cotton monoculture; cotton–vetch (CV); cotton–wheat, in which wheat stubble was incorporated into the beds with a disc-hiller (CW); and cotton–wheat–vetch, in which wheat stubble was retained as in-situ mulch (CWV). Vetch was killed by a combination of mowing and contact herbicides, and the residues were retained as in situ mulch. Root length per unit area of vetch in CWV and wheat in both CW and CWV was comparable, although wheat had a higher concentration of roots in surface 0.10 m. Root growth of the CV treatment was sparse. Root carbon available for addition to soil was greater with vetch than with wheat and was in the order: vetch in CWV (5.1 t C/ha.year) > vetch in CV (1.9 t C/ha.year) > wheat in CW (1.6 t C/ha.year) = wheat in CWV (1.7 t C/ha.year). Intra-seasonal root mortality accounted for 12% of total root carbon in vetch and 36% in wheat. The remaining fraction consisted of carbon in the root mass at the end of the growing season. Carbon sequestered by root inputs of the rotation crops was estimated to be ~0.34 t C/ha.year for the vetch and wheat crops in the CWV rotation, 0.10 t C/ha.year for vetch in CV, and 0.08 t C/ha.year for wheat in CW. Rotation CWV was, therefore, the most effective in sequestering carbon from roots.

EVIDENCE THAT POTATO VIRUS Y IS CARRIED NEAR THE TIP OF THE STYLETS OF THE APHID VECTOR MYZUS PERSICAE (SULZ.)

1955 ◽  
Vol 1 (9) ◽  
pp. 775-782 ◽  
Author(s):  
R. H. E. Bradley ◽  
R. Y. Ganong
Keyword(s):  
Potato Virus ◽  
Myzus Persicae ◽  
Potato Virus Y ◽  
Wave Band ◽  
Tobacco Plants ◽  
Aphid Vector ◽  
Green Peach Aphids ◽  
Infected Tobacco ◽  
Test Plants

Green peach aphids infective with potato virus Y were made noninfective by exposing the tips of their stylets to ultraviolet radiations in the 2537 Å wave band. Similar results were obtained when the area around the aphid was ventilated during irradiation to carry away the ozone produced by the radiations passing through the air. This irradiation did not appear to harm the aphid even though much of its body was irradiated at the same time. Nor did it affect the infectivity of aphids when their stylets were enclosed by the labium, or when most of the length of the stylets except the tips was exposed to the radiations. Irradiation did, however, reduce the ability of aphids immediately thereafter to acquire potato virus Y during a brief feeding puncture, but this was so whether the tips of the stylets were irradiated or not. Furthermore, an hour after being irradiated, aphids acquired the virus during a brief feeding puncture as readily as did unirradiated controls. It is concluded that irradiation of the tips of the stylets of M. persicae inactivated potato virus Y that otherwise would have been transmitted to the test plants. Only virus near the tips of the stylets appeared to be transmitted even after more than the tips had been inserted into infected tobacco plants.

scholarly journals Discovery of metabolic resistance to neonicotinoids in green peach aphids (Myzus persicae) in Australia

2017 ◽  
Vol 73 (8) ◽  
pp. 1611-1617 ◽  
Author(s):  
Siobhan C de Little ◽  
Owain Edwards ◽  
Anthony R van Rooyen ◽  
Andrew Weeks ◽  
Paul A Umina
Keyword(s):  
Myzus Persicae ◽  
Metabolic Resistance ◽  
Green Peach Aphids

Lethal amounts of ricinine in green peach aphids (Myzus persicae) (Suzler) fed on castor bean plants

Plant Science ◽  
1991 ◽  
Vol 73 (2) ◽  
pp. 253-256 ◽  
Author(s):  
Julius I. Olaifa ◽  
Fumio Matsumura ◽  
Jan A.D. Zeevaart ◽  
Christopher A. Mullin ◽  
Petros Charalambous
Keyword(s):  
Myzus Persicae ◽  
Castor Bean ◽  
Bean Plants ◽  
Green Peach Aphids
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