The Effect of Pear Psylla, Psylla pyricola, Control on Growth and Survival of Bartlett Pear Trees on Two Rootstocks

Author： Burts Everett C.   Kelly Samuel G.  

Publisher： Entomological Society of America

ISSN： 1938-291X

Source： Journal of Economic Entomology, Vol.59, Iss.1, 1966-02, pp. : 192-194

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