Study on the Forecast Technique for Dieback ofPinus syivestris var. mongolica;

Study on the pathogen of rhododendron dieback;

The dieback of juniper has been serious gradually since recent years in the Huhhot nursery.

Shoot blight of pinus sylvestris is a kind of host major disease.

The pathogens of shoot blight of Juniperus rigida Sieb.

Biological Characteristic of Shoot-blight for Pinus sylvestris var. mongolica;

Determination of the Loss and Control Index of Shoot-blight of Pinus slyvestris var. mongolica;

Through test on the seedling of pines indoor and outdoor,the antagonistic strain NA which had strong biocontrol effect against Sphaeropsis sapinea was obtained.

By the dural culture method on PDA plates with pathogens,16 bacteria isolates had strong antagonism against Sphaeropsis sapinea.

Through collecting,isolating and cultivating the pine phyllosphere microbes,several isolates were selected to test their antagonistic effect to Sphaeropsis sapinea and Pestalotiopsis sp.

Pine die back and brown spot needle blight disease(caused by Diplodia pinea and Lecanostica acicola) are two most destuctive diseases and impedes efficient management of Loblolly( Pinus taed L.

Occurrence regularity and control experiment of shoot wilt in Phyllostachys prominens;