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Pierce's Disease
Research Updates

piercesdisease.cdfa.ca.gov

What is Pierce's Disease?

Pierce's Disease is a bacterial infection, which is spread by bugs that feed on grapevines, particularly the "glassy winged sharpshooter." Grapevines that become infected with PD can quickly become sick and die.

glassy-winged sharpshooter

Effects of chemicals on dormancy breaking of grape

  • Author(s): Chen, Jianchi; Fang, Jin-bao; Gu, Hong; Tian, Li-li;
  • Abstract: The effects of different chemicals on dormancy breaking were studied with cultivars Centennial seedless and Flame seedless in field and Zana and Fujiminori in green house. The results showed that the effect of H2CN2 was significant applied in the green house. It stimulated bud break and blossom to occur 9-12 and 10-12 days earlier than in untreated vines respectively. The harvest date advanced by almost 2 weeks. CaCN2, TDZ, GA3, 6-BA and KNO3 showed different effects on rest breaking to some extent.
  • Publication Date: Jun 2003
  • Journal: Xibei Zhiwu Xuebao

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