Vol. 17, Issue 1, 1963January 01, 1963 PDT
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Orchard tests substantiate: Role of pear psylla in pear decline
Orchard tests substantiate: Role of pear psylla in pear decline
C Gonzales, W Griggs, D Jensen, S Gotan,
Gonzales, C, W Griggs, D Jensen, and S Gotan. 1963. “Orchard Tests Substantiate: Role of Pear Psylla in Pear Decline.” California Agriculture 17 (1): 4–6.