Occurrence Pattern And Integrated Control Of 3 Main Jujube Diseases In Xiaohaizi Reclamation Area Of Xinjiang Under Dwarf And Close-planting Managements

Objective: In order to explicit the epidemic and injury of three main diseases, jujube shrink disease, jujube black spot and jujube leaf spot disease in Xiaohaizi reclamation area of Xinjiang in dwarf and close-planting orchards. Meantimes in order to screen high active, low toxic fungicides to control three main diseases. According to epidemic investigation and fungicides screening,the integrated Management Techniques in Xiaohaizi reclamation have been proposed.Methods: By using the method of timing point, the epidemic and injury of jujube shrink disease, jujube black spot and jujube leaf spot disease in Xiaohaizi reclamation area were investigated. By using the method of general survey, the effect of different cropping pattern, irrigation pattern, variety and age of tree to three diseases were investigated.To Master relevance between site conditions and disease occurrence.The eight fungicides to control three diseases were screened in field. Meantimes in order to screen high active, low toxic fungicides to control three main diseases for prevention.Results: 1. The jujube fruit shrink disease growth and decline regular inverted "V" type in field, Starting of the disease in mid 7, 8 months late into the peak, with fruit maturation, the incidence decreased. The jujube black spot disease was saw in late August,then increased, until the harvest. The jujube leaf spot disease can occur during the whole growing period, and the whole growth period increased, no obvious peak. 2. The intercropping mode can aggravate for three diseases. jujube-cotton,jujube- pepper mode the incidence of weight in monoculture.The variety with disease severity of jujube shrink disease, jujube black spot were closely related. The different irrigation pattern and tree age no obvious effect to the disease severity of three diseases. 3. The 70% thiophanate methyl, 70% mancozeb, 3% Zhongshengmycin and pyrimidine nucleoside antibiotic of 8 kinds of fungicides had better control effect to three diseases.Conclusions: The intercropping mode can aggravate for three diseases.Through grafting jujube fruit smaller of species in new jujube orchard, carry out intercropping pattern in new orchard and cancel the intercropping pattern in older orchards, then increase the ventilation and light etc culture measures to reduce the diseases severity. The 70% thiophanate methyl, 70% mancozeb, 3% Zhongshengmycin and pyrimidine nucleoside antibiotic can effective to control diseases,while to achieve better control effect.