Results 31 to 40 of about 792,268 (149)

Progress report on Pear Decline: The university of california research committee on pear decline

open access: yesCalifornia Agriculture, 1965
California Agriculture - All ...
California Agriculture
doaj  

Apple proliferation phytoplasma influences the pattern of plant volatiles emitted depending on pathogen virulence

open access: yesFrontiers in Ecology and Evolution, 2016
Apple proliferation (AP) and pear decline (PD) are the most severe diseases in pome fruit growing areas. AP-infected trees show typical symptoms such as witches’ broom, enlarged stipules, tasteless and dwarf fruits.
Margit eRid   +5 more
doaj   +1 more source

Pear decline research: —Progress summary

open access: yesCalifornia Agriculture, 1963
California Agriculture - All ...
California Agriculture
doaj  

A pressure machine for injecting trees

open access: yesCalifornia Agriculture, 1976
A portable pressure-injection machine has proved to be an effective means of treating pear trees for pear decline and may also be useful for injecting other materials into other trees.
W Reil, J Beutel
doaj  

The relation of pear psylla to pear decline … greenhouse tests

open access: yesCalifornia Agriculture, 1963
Extensive research by U.C. entomologists, in both greenhouse and field test plots, on the relation of insects to the cause or spread of pear decline disease indicates that the pear psylla, Psylla pyricola Foerster, is the key to the problem.
D Jensen, W Erwin
doaj  

SEASONAL OLIGOPOLY POWER IN THE D'ANJOU PEAR INDUSTRY [PDF]

open access: yes
We estimate seasonal oligopoly power at a disaggregated variety level in the D'Anjou pear market. Our data spans 1993 to 2000, during which time imported pears became more prevalent in the U.S. market.
Winfree, Jason A.   +3 more
core  

Transmission of the European pear decline to the American indicator hosts 'Magness' and 'Precocious' [PDF]

open access: yes, 1980
Durch seitliches Einpfropfen von Reisern im November und durch Wurzelpfropfungen im Februar wurde versucht, den europäischen Birnenverfall im Gewächshaus auf die amerikanischen Indikatorsorten 'Magness' und 'Precocious' zu übertragen.
Schaper, Ulrike   +2 more
core  

Pear decline research a report of the University of California Research Committee on pear decline—1964

open access: yesCalifornia Agriculture, 1964
California Agriculture - All ...
California Agriculture
doaj  

Old home pear: Is proving valuable as a rootstock in combating pear decline and fire blight

open access: yesCalifornia Agriculture, 1961
The Old Home pear variety is resistant to fire blight and pear decline, has a well-shaped trunk, a good scaffold system, and is easily propagated on its own roots by hardwood cuttings.
W Griggs   +3 more
doaj  

B-15 Side A - Elward Pear

open access: yes, 1980
Elward Pear, age 74, recollects growing up in Humbermouth, working for the railway, and the effects of the Great Depression and WWII.Side B of cassette tape is ...
Brake, Peter
core  

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