Last edited by Gugrel
Tuesday, July 28, 2020 | History

2 edition of Distribution of pear psylla, Psylla pyricola Foerster, and honeydew in Bartlett pear trees found in the catalog.

Distribution of pear psylla, Psylla pyricola Foerster, and honeydew in Bartlett pear trees

Martin George Kers

Distribution of pear psylla, Psylla pyricola Foerster, and honeydew in Bartlett pear trees

by Martin George Kers

  • 220 Want to read
  • 4 Currently reading

Published .
Written in English

    Subjects:
  • Pear -- Diseases and pests.

  • Edition Notes

    Statementby Martin George Kers.
    The Physical Object
    Paginationvii, 43 leaves, bound :
    Number of Pages43
    ID Numbers
    Open LibraryOL16563885M


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Distribution of pear psylla, Psylla pyricola Foerster, and honeydew in Bartlett pear trees by Martin George Kers Download PDF EPUB FB2

With psyllids, Horton and Landolt () used a Y-tube olfactometer to show that males of the pear psylla, Cacopsylla pyricola (Förster) [Psyllidae], are attracted to volatile odors from female The Past and Present of Pear Protection Against the Pear Psylla, Cacopsylla pyri L.

that when the presence of C. pyri rapidly increases in the thir d decade of May, usually we   Pear psylla ovipositional data will be collected throughout the season beginning 1 March.

25 terminal cuttings containing 5 buds each will be pruned and bagged with the eggs deposited on buds followed counted using HVL dissecting scopes.

Bi-weekly leaf samples of 25 leaves per treatment will be collected and evaluated and honeydew in Bartlett pear trees book pear psylla nymphs and Full text of "Journal of the New York Entomological Society" See other formats Phylogenetic analysis of 18S rDNA nucleotide sequences of hemipteran exemplars shows Sternorrhyncha (psyllids, whiteflies, aphids and scales) is monophyletic and forms a sister group to all other hemipterans (Euhemiptera).

Whiteflies form a sister group to aphids and scales. Psyllids form a sister group to all other Sternorrhyncha. Primary structures of 18S rDNAs of all sternorrhynchans are Distribution of Helisoma duryi, an introduced competitor of intermediate hosts of schistosomiasis, in an irrigation scheme in northern Tanzania.

Acta Tropica Madsen, H. Biological methods for the control of freshwater snails. Parasitology Today, 6(7): Madsen, H. & ~legneref/bcbiblio/ This book summarizes biological control programmes in Canada since Previous volumes in the series were published inand While similar in format to the previous books, this one departs in important ways.

Choristoneura rosaceana (Harrison), and pear psylla, Cacopsylla pyricola Förster (Croft et al, ; Anonymous Full text of "Pesticides documentation bulletin" See other formats During the last decade losses of apricot and pear trees due to European stone fruit yellows (ESFY) and pear decline (PD) have become a major concern.

Surveys on the occurrence and distribution of psyllids in pome and stone fruit orchards revealed the presence of Cacopsylla pruni, C. pyricola, C. pyri, C.

pyrisuga, C. melanoneura and C. :// PHYTOPLASMAS Genomes, Plant Hosts and Vectors This page intentionally left blank PHYTOPLASMAS Genomes, Plant Hosts and Vectors Edited by Phyllis G. Weintraub Agricultural Research Organization Gilat Research Center Israel and.