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Specific replant disease (also known as sick soil syndrome) is a malady that manifests itself when susceptible plants such as apples, pears, plums, cherries and roses are placed into soil previously occupied by a related species. The exact causes are not known, but in the first year the new plants will grow poorly.
USDA PLANTS Database: California State Noxious Weeds List; Cal-IPC: California Invasive Plant Council homepage + information. Cal-IPC: CalWeedMapper; California Native Plant Society—CNPS: Invasive Weeds + links. UC IPM" Invasive Plants of California — managing invasive plants. PlantRight.org: address and stop sale of invasive garden plants ...
To find out the best and safest way to prune apple trees, we chatted with an expert arborist and the owner of an orchard. Both shared their tips for pruning apple trees to keep them happy and ...
Apple mosaic virus (ApMV) is a plant pathogenic virus of the family Bromoviridae. It is named after its symptoms that were first present on apples. [ 1 ] ApMV is a positive sense RNA based virus. [ 1 ]
Gymnosporangium juniperi-virginianae is a plant pathogen that causes cedar-apple rust. [1] In virtually any location where apples or crabapples ( Malus ) and eastern red cedar ( Juniperus virginiana ) coexist, cedar apple rust can be a destructive or disfiguring disease on both the apples and cedars.
Apple trees can recognize invading pathogens and mount a defense. [4] Often, the plant may be able to resist the pathogen, even though it has no genetic resistance to same. Apple trees seem to have a weak defense to A. mali, base on the fact that no survivors if leaves has been infected. [clarification needed]
Five years after the first light brown apple moth was found in California, the state eliminated funding for inspection and monitoring, due to the statewide budget problems in 2012. [15] The federal government funded the inspection program, and farmers were left to use pesticides to kill moth infestations at their own expense.
The first light brown apple moth to be confirmed in California by DNA analysis was found in February 2007. James Carey, a professor of entomology at the University of California-Davis, believes, based on his previous experience with the gypsy moth program and its geographic spread at the time of identification, that the light brown apple moth had likely been in California for many years before ...