Bactericera cockerelli pdf

  1. Activity of two entomopathogenic fungi, molecularly identified, on bactericera cockerelli
  3. Bactericera cockerelli - Wikipedia

Name: Bactericera cockerelli (Šulc) Bactericera cockerelli is found primarily on plants within .. Feb 22, PDF | Bactericera (Paratrioza) cockerelli (Šulc) (Hemiptera: Triozidae) is a native American psyllid species that was first reported in New. Sep 10, PDF | The tomato potato psyllid (Bactericera cockerelli (Sulc)) probably invaded New Zealand in the summer of The first authenticated.

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Bactericera Cockerelli Pdf

Apr 7, Citation: Prager SM, Esquivel I, Trumble JT () Factors Influencing Host Plant Choice and Larval Performance in Bactericera cockerelli. Jul 16, PDF. Sections. Identity; Hosts; Geographical distribution; Biology Bactericera cockerelli is found primarily on plants within the family. This presentation will discuss the potato psyllid, Bactericera . http://www. liberibacter by Bactericera cockerelli (Hemiptera: Triozidae) in zebra chip potato disease: effects of.

Binomial name Bactericera cockerelli Bactericera cockerelli, [1] also known as the potato psyllid, is a species of psyllid native to southern North America. It is restricted to the western part of the continent. As its name suggests, it is commonly found on potato and tomato crops, but has a species range that encompasses over 40 species of solanaceous plants and as many as 20 genera. Breeding hosts are generally recognised as being restricted primarily to Solanaceae , including important crop and common weed species, and a few species of Convolvulaceae , including bindweed and sweet potato. On some plants, especially potato, feeding of the nymphs causes a condition called psyllid yellows , presumed to be the result of a toxin. Both nymphs and adults can transmit the bacterium Candidatus Liberibacter. Zebra chip is a recently diagnosed disease of potatoes associated with psyllid infestation and caused by species of the gram-negative bacterium, Candidatus Liberibacter.

An example is ulations of this pest in Mexico. Liu et al. The col- pansion or an evolution of a new biotype of B. The results indicated the development of a new selected based on the records of the insects that were biotype of the insect, which had become adapted to pest on the potato crop.

In a subsequent study, Jackson de Mexico Edo. In an attempt to obtain a represen- tions and those of B.

Statistical analysis of the genetic Mexico. This procedure was per- Based on the binary matrix a pairwise genetic dis- formed on 50 insects of each population. The genetic distance matrix generated was sub- polymerase chain reaction PCR. The bootstrap analysis was conducted with The PCR was carried out in reactions of Both computations MgCl2, 0.

A PCR tube con- ris The hierarchy 2 min for the initial separation of the DNA strands. This was followed by 36 cycles mutations.

Inter simple sequence repeat products were elec- Genetic Diversity in B.

The size of the fragments ranged from pH 8. After staining with ethidium bromide, the to 3, bp Fig. The lowest gene classes in a diploid individual AA, Aa, and aa only diversity was found in the population of Edo. When all populations marker. According to Hollingsworth and Ennos were considered, the total genetic diversity was 0. The bootstrap values for each pop- Genetic Distance in B. The population of B. The dendrogram shown in Fig. Gene diversity estimates of seven B.

Activity of two entomopathogenic fungi, molecularly identified, on bactericera cockerelli

Genetic H index I loci P variation, the raw material upon which natural selec- Morelos 0. The Oaxaca 0. If genetic Edo. Lowe et al. Pair-wise estimation of genetic differentiation and gen flow among seven B. This information is then sub- rithm was used Lowe et al. The values ob- jected to a phenetic analysis to produce a visual rep- tained in the B. However, our results show higher basis for population genetics and helps us to draw values than Liu et al.

In terms of per- populations within the same group or clade in a tree centage of the polymorphic loci, our values for B. Dendrogram showing grouping of the seven populations of B. Bootstrap values were given at the fork of each group. These results are B.


They indicated that 5. This result also indicate that Total This result mit associated pathogens Abdullah , Jackson et could be because of the fact that B. This has tures and lack of feeding sites during the summer Liu been evidenced in studies based on the genetic dif- et al. The evidence of such migrations, which ferentiation of the two biotypes of B. However, the invasive populations of mutually exclusive groups are considered as evidence psyllids prefer to feed on tomato plants in these areas of genetic isolation of populations Hollingsworth and showing improved survival and growth rate Liu and Ennos In our study, the measures of genetic Trumble In the same way, ental in the eastern portion, the Sierra Madre del Sur studies on the biology of B.

These physiographic the genetic variation could affect the ability of this regions could serve as geographic barrier preventing insect to transmit the pathogens associated with it, the migration of B. Meanwhile, in References Cited case of the populations from Sinaloa northwest and Michoacan southwest other factors could be in- Abdullah, N. Life history of the potato psyllid volved in their migration patterns such as wind direc- Bactericera cockerelli Homoptera: Psyllidae in con- tion, weather conditions, and terrain of the region.

In our study, the variations within the populations Res. Sanchez, and J.

Bactericera cockerelli - Wikipedia

Vectors casual of potato purple top in Coahuila and Nuevo Leon, with research done in earlier studies on this insect. Furthermore, the degree of variation between the Cadena, M. Guzman, M. Diaz, T. Zavala, O. Lopez, A.

Rivera, and O. Dis- shown in the unweighted pair-group method with tribucion, Incidencia y Severidad del Pardeamiento y la arithmetic average dendrogram Fig. Trumble, and R.

Mexi- differentiation between eastern populations and recent cana de Fitopatol. American psyllidae III Triozinae. Crawford, D. A monograph of the jumping plant-lice Liu, D. Diaz, G. Tejeda, and A. Efecto de Lowe, A. Harris, and P. Ecological genet- insecticidas biorracionales y mezclas de hongos sobre ics: design, analysis, and applications.

Blackwell Ltd. En- ford, United Kingdom. McDermott, J. Department of Genetics, University of Munyaneza, J. Crosslin, and J. Asso- Washington, Seattle, WA. Aleman, and Z. Flores Olivas and R. Lira Saldivar eds. Buchman, J. Upton, J. Goolsby, Punta Morada de la papa. The eggs are initially light yellow and become dark yellow or orange with time. The eggs measure about 0. Eggs hatch days after oviposition Pletsch, ; Wallis, ; Capinera, ; Abdullah, Because nymphs prefer sheltered and shaded locations, they are mostly found on the lower surfaces of leaves and usually remain sedentary during their entire development.

Nymphs and adults produce large quantities of whitish excrement particles, which may adhere to foliage and fruit. Nymphs are elliptical when viewed from above, but are very flattened in profile, appearing almost scale-like. Potato psyllid nymphs may be confused with the nymphs of whiteflies, although the former move when disturbed.

There are five nymphal instars, with each instar possessing very similar morphological features besides size. The size of the developing wingpads increases with each instar. Nymphal body widths are variable, ranging from 0. Initially, the nymphs are orange, but they become yellowish-green and then green as they mature. The compound eyes are reddish and quite prominent. During the third instar, the wing pads, light in colour, are evident and become more pronounced with each subsequent molt.

A short fringe of wax filaments is present along the lateral margins of the body. Total nymphal development time depends on temperature and host plant and has been reported to have a range of 12 to 24 days Knowlton and Janes, ; Abdullah, ; Yang and Liu, Distribution Top of page B.

Contrary to reports in the older literature Pletsch ; Wallis ; Cranshaw , , the potato psyllid does indeed occur in Washington and Oregon, where it appears to overwinter locally Jensen, and usually colonizes potato fields in late June and early July Munyaneza et al. Murphy et al. Overwintering in areas north of the Texan or Mexican border is a recent development, as is psyllid infestation in southern Idaho and other northern parts of the current range.

Before about , potato psyllid was a migratory species, overwintering in northern Mexico and southern Texas and migrating into the Great Plains each summer.

Places farther north were colonized intermittently.

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