scholarly journals Reproductive Biology of Three Cosmopolitan Mealybug (Hemiptera: Pseudococcidae) Species, Pseudococcus longispinus, Pseudococcus viburni, and Planococcus ficus

2011 ◽  
Vol 104 (2) ◽  
pp. 249-260 ◽  
Author(s):  
Rebeccah A. Waterworth ◽  
Ian M. Wright ◽  
Jocelyn G. Millar
Keyword(s):  
Reproductive Biology ◽  
Planococcus Ficus ◽  
Pseudococcus Longispinus ◽  
Pseudococcus Viburni

Molecular and morphological characterization of mealybugs (Hemiptera: Pseudococcidae) from Chilean vineyards

2012 ◽  
Vol 102 (5) ◽  
pp. 524-530 ◽  
Author(s):  
M.C.G. Correa ◽  
J-F. Germain ◽  
T. Malausa ◽  
T. Zaviezo
Keyword(s):  
Management Strategies ◽  
Common Species ◽  
Morphological Characterization ◽  
Economic Losses ◽  
Morphological Examination ◽  
Pseudococcus Longispinus ◽  
Main Production ◽  
Pseudococcus Viburni ◽  
Production Areas

AbstractMealybugs are major pests of grapevines worldwide. They cause economic losses by lowering the cosmetic value of fruits, reducing yields, transmitting viruses and resulting in the quarantine or rejection of produce in international trade. Knowledge of the species present in a vineyard is important for the adjustment of management strategies. We surveyed and accurately characterized the mealybugs infesting vineyards in one of the main production areas of Chile; 164 mealybugs were sampled from 26 vineyards in four regions of Chile and identified by DNA sequencing for two markers (cytochrome oxidase I and internal transcribed spacer 2) and morphological examination.Pseudococcus viburni(Signoret) was the most common species, followed byPseudococcus meridionalisPrado andPseudococcus cribataGonzález. Molecular variability at the COI and ITS2 loci was observed in bothP. viburniandP. cribata. A comparison of haplotypes ofP. viburniworldwide provides support for a recent hypothesis that this species is native to South America, a finding with direct consequences for management. NeitherPseudococcus longispinus(Targioni & Tozzetti) norPlanococcus ficusSignoret were found.

scholarly journals Cochinillas presentes en viñedos de Colonia Caroya, Córdoba, Argentina. Incidencia en el cultivo y efectos sobre la calidad de los mostos

Agriscientia ◽  
2016 ◽  
Vol 33 (1) ◽  
pp. 27-38
Author(s):  
A.I. Viglianco ◽  
C.I. Cragnolini ◽  
M. Bocco ◽  
S.C. Reynoso
Keyword(s):  
Pinot Noir ◽  
Planococcus Ficus ◽  
Pseudococcus Viburni

En viñedos de Colonia Caroya, Córdoba, se ha observado un incremento de la población de cochinillas a partir de 2001-2002. El objetivo del trabajo fue determinar las especies presentes, su incidencia en viñedos de la zona y sus efectos sobre calidad de mostos. Para identificar las especies se recolectó material vegetal de variedades tintas y blancas; se cuantificó la incidencia y la intensidad de la especie más abundante en 15 viñedos en 2010 y 2011 y se determinó el efecto de las cochinillas sobre la calidad de mostos en las variedades Chardonnay, Merlot y Pinot noir. Se identificaron dos especies de Pseudoccocidae, Planococcus ficus (Signoret) y Pseudococcus viburni (Signoret) que afectan racimos, hojas, brotes, sarmientos y troncos y una de Coccidae, Parthenolecanium persicae (Fabricius) que afecta fundamentalmente hojas, sarmientos y troncos. La especie más abundante es P. ficus, con una incidencia en viñedos de 73% en 2010 y 87% en 2011. En este período la incidencia en plantas varió de 17 a 28%, y a medida que crece el porcentaje de plantas afectadas lo hace también el de racimos. En racimos con más de 50% de raquis afectado se observa deterioro de algunos índices de calidad de mostos.

Influence of mating disruption on the reproductive biology of the vine mealybug, Planococcus ficus (Hemiptera: Pseudococcidae), under field conditions

2018 ◽  
Vol 74 (12) ◽  
pp. 2806-2816 ◽  
Author(s):  
Arturo Cocco ◽  
Enrico Muscas ◽  
Alessandra Mura ◽  
Andrea Iodice ◽  
Francesco Savino ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Mating Disruption ◽  
Field Conditions ◽  
Planococcus Ficus ◽  
Vine Mealybug

scholarly journals Role of olfaction in host selection by Pseudaphycus maculipennis (Hymenoptera Encyrtidae)

2005 ◽  
Vol 58 ◽  
pp. 311-314
Author(s):  
W.R.M. Sandanayaka ◽  
J.G. Charles ◽  
P. Ramankutty
Keyword(s):  
Host Selection ◽  
Host Finding ◽  
Similar Response ◽  
Strong Response ◽  
Pseudococcus Longispinus ◽  
Choice Tests ◽  
Clean Air ◽  
Pseudococcus Viburni

The volatile stimuli for host finding by Pseudaphycus maculipennis were examined in a Ytube olfactometer The responses of naïve female parasitoids (23 days old) to two mealybug species Pseudococcus viburni (obscure mealybug) and Pseudococcus longispinus (longtailed mealybug) on sprouting potato were measured The percentage of parasitoids to choose the odourladen arm compared to clean air was similar for both mealybug species on potato sprouts (80 to 825) When given a choice between mealybug species on potato sprouts the parasitoid preferred the obscure mealybug The parasitoids also responded to an excised sprout from an uninfested potato when compared with clean air Further choice tests showed that honeydew secreted by either mealybug species was similarly attractive while honeydew was more attractive than the ovisacs from obscure mealybug This work shows that P maculipennis exhibits a strong response to the plant of their host and prefer obscure mealybug to longtailed mealybug despite a similar response to honeydew from both species

Fine structure and possible functions of the hermaphrodite duct of some pulmonate snails (Mollusca: Gastropoda)

1990 ◽  
Vol 48 (3) ◽  
pp. 68-69
Author(s):  
Alan N. Hodgson
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fine Structure ◽  
Seminal Vesicle ◽  
Reproductive Biology ◽  
Light Microscope ◽  
Light Microscope Level ◽  
Transmission Electron ◽  
Standard Techniques

The hermaphrodite duct of pulmonate snails connects the ovotestis to the fertilization pouch. The duct is typically divided into three zones; aproximal duct which leaves the ovotestis, the middle duct (seminal vesicle) and the distal ovotestis duct. The seminal vesicle forms the major portion of the duct and is thought to store sperm prior to copulation. In addition the duct may also play a role in sperm maturation and degredation. Although the structure of the seminal vesicle has been described for a number of snails at the light microscope level there appear to be only two descriptions of the ultrastructure of this tissue. Clearly if the role of the hermaphrodite duct in the reproductive biology of pulmonatesis to be understood, knowledge of its fine structure is required.Hermaphrodite ducts, both containing and lacking sperm, of species of the terrestrial pulmonate genera Sphincterochila, Levantina, and Helix and the marine pulmonate genus Siphonaria were prepared for transmission electron microscopy by standard techniques.

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