Optimum time for control of pear rust(Gymnosporangium haraeanum Syd.) with fungicides in Laiyang;

Advancement in Rust Research on Cool Season Turfgrass in China;

Studies on Spores Flying Disease Gradient and Space Distribution of Corn Common Rust;

This paper summarizes the hazard,regularity and control technology of the rust disease of Malus micromalus tree in Hequ County.

This text elaborated pathogeny,symptom,the outbreak regulation of the maize rust disease and outbreak a condition,harming the dissemination characteristics according to the disease,getting sick to the maize rust of the prevention and cure measure carried on an overview,put forward with the anti-disease teach to grow for core of comprehensive prevent and cure measure.

It has conducted the preliminary research to the rust disease of Oxytropis ochrocephala Bunge From 2005 to 2006, the main findings as follows: 1.

This thesis is mainly about the pest risk analysis on fire blight(a disease caused by an alien invasive species Erwinia Amylovora)in assist of the technique of Geographical Information System and about the foundation of an multiple index analysis system for alien invasive species.

Alternaria geisen is one of the pathogens of pear which can cause pear black spot.

Pear black spot is one of the major disease in fruits and spreads worldwidle.

The fungitoxicity of pyrimethanil against Alternaria alternata was assessed by the mycelial growth rate method,and the field trial efficacy of pyrimethanil in controlling the pear black spot was evaluated.