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Occurrence and Epidemic Regularity and Control of Pear Rust New Disease in Xinjiang

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年19
Page:
21-27
Research Field:
Publishing date:

Info

Title:
Occurrence and Epidemic Regularity and Control of Pear Rust New Disease in Xinjiang
Author(s):
WANG Jiehua1; CHEN Weimin2; HAN Lili2; GAO Xia2
(1.College of Agriculture,Xinjiang Agricultural University，Urumqi，Xinjiang 830052；2.Department of Agriculture,Yili Vocational and Technical College,Yining，Xinjiang 835000)
Keywords:
pear rust; new disease; epidemic regularity; meteorological factors; medicament; control
PACS:
-
DOI:
10.11937/bfyy.20190987
Abstract:
In order to master the occurrence of pear rust，a new pear disease in Xinjiang，an experiment was performed to investigate the occurrence，seasonal prevalence，meteorological factors and field plot experiment of pear rust in ‘Gongli’ by using a five-point sampling method and a random area arrangement method in Tekes County，Xinjiang.The results showed that the incidence of pear rust，the average leaf disease rate and the average disease index of diseased leaves in a pear orchard of Tekes County were 100%，70.91% and 19.59 respectively.Winter spore horns of pear rust were produced on cypresses from late April to early May，the initial onset of pear rust was in mid-June，while the peak period of onset was from late June to early July.The infection stops around mid-late July to mid-early August.Spores of pear rust migrate to cypresses from late August to early October and live through the winter on cypresses from mid-October to mid-April next year.The average of maximum temperature from April to May in Tekes county was 18 ℃，and the total rainfall was 48 mm.These conditions meet the meteorological needs for winter spore horn of pear rust to produce new spores.In late May，the stem and leaf were treated with 40% trimethazole WP (trade name：Xinsheng) 5 000 times solution，which could prevent the occurrence of pear rust effectively and safely.

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Last Update: 2019-10-09