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Studied on Pathogen of Onion Fusarium Basale Plate Rot and Chemical Control in Jiayuguan

Author: XuDong
Tutor: LiMinQuan
School: Gansu Agricultural University
Course: Crop Protection
Keywords: The onion base plate rot Fusarium oxysporum Resistant varieties Fungicide screening Pollution-free chemical control
CLC: S436.33
Type: Master's thesis
Year: 2010
Downloads: 29
Quote: 0
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Executive Summary

Rot occurred onion base plate for the new town of Jiayuguan, Gansu Province conducted a survey to study the disease pathogens. Preliminary study on the onion varieties rot disease resistance of the base plate, indoor chemical screening for prevention and control the onion base plate rot, and chemical control tests carried out in the field. 1 the onion base plate rot symptoms: early onset of leaf yellowing, wilting or bent the the fertility peak onion bulbs side was soft rot like corruption, after expansion to stem disc, all serious aboveground wilting, stem disk brown dead. White or gray mold shaped humidity scales. Dry conditions, disease tissue the purple death or dead. The pathogenic findings the Fusarium oxysporum the largest share, 69.66%, 21.99% and 8.35%, while the proportion of Fusarium solani and Fusarium order. Indoor dish Pathogenicity Test results show that the the Fusarium oxysporum condition index was 60.2, the strongest pathogenic rot main pathogens causing onion base plate. Research the Jiayuguan new towns plate method 10 onion cultivars disease resistance identification. The results show that there are differences between the varieties of onion base plate rot resistance, Fusarium oxysporum shepherd boy from the resistant performance point of view, Kim Mi F1 moderately resistant (MR) varieties, the sun Green Lion is in a sense (MS) varieties, red classic, red 08, yellow 02, Zijin 505F1, Ruby 911F1 for a sense of the variety of disease (S), Europe Panther No. 1 variety is highly susceptible (HS). 3 indoor fungicides inhibit the growth of pathogens, but there are differences between the different pharmacy. Carbendazim, chlorothalonil, evil mildew blessing facilities bacteria grams of Fusarium oxysporum effective concentration (EC50) for 69.58,158.12,143.13,6.03 μg / mL, respectively, were Fusarium solani EC50 5 The 87,152. 76,35, 75 and 70. 12μg/mL, Fusarium EC50 49.53,2.11,4.48 and 126.61μg/mL. To facilities bacteria grams inhibition is the most prominent, carbendazim followed, chlorothalonil worst. Four agents correlation coefficient above 0.98, the drug concentration was positively correlated with inhibition. Field of chemical control test in seven pesticides as test materials, the onion field chemical test in the new town of Jiayuguan City, using a randomized block design, repeated four times. Harvest of each plot were measured by the incidence of the base plate of onion rot disease index, production and other indicators, the comprehensive evaluation. The results show that the control effect is good for 15% Avi. Poison EC 1500 times, 15% avermectin. Poison EC1000 times, reached 84.79%, 81.11%. Seen 15% yield monitor Avi. Poison EC 500 times, 15% of the the Avi. Poison EC 1500 times increasing effect of the two treatments, an increase of 14.23%, 8.54%, 40% phoxim EC 800 times handling cut 6.64%. 90% trichlorfon GR (0.6g), 40%, phoxim EC 400 times, 90% trichlorfon GR (1.2g) the three processing yield differences.

Full-text Catalog

Abstract     2-4
summary     4-8
Foreword     8-9
first chapter of literature review     9-22
1. Description and onion varieties     9-11
1.1 Description and distribution of onion     9
1.2 Onion major species and varieties     9-11
1.2.1 The main types     9-10
1.2.2 Main Cultivars     10-11
2. Onion major diseases Research     11-14
2.1 Onion major diseases     11-13
2.1.1 onion fungal diseases     11-12
2.1.2 onion bacterial diseases     12-13
2.1.3 onion virus disease     13
2.2 Integrated Control of Diseases in the onion approach     13-14
2.2.1 introduced strict procedures, screening varieties     13 < br /> 2.2.2 emphasis on crop rotation, tillage management to strengthen     13
2.2.3 seedling pest prevention, nurturing seedlings     13-14
2.2.4 strengthen field management     14
3. onion base plate rot pathogen, occur, distribution and damage     14-15
4. three kinds of onions base plate rot pathogenic Fusarium host range studies Progress     15-17
5. resistance identification methods     17-20
5.1 Field identification     18
5.2 Indoor identification     18-19
5.3 vitro identification     19
5.4 indirect identification     19-20
6. pair of Fusarium oxysporum Chemical Control Research     20-21
7. rhizosphere nematodes with onion disease research     21
8. purpose of this experiment and its significance     21-22
Chapter Jiayuguan City, town onion base plate rot pathogen identification and pathogenicity determination     22-29
1 Materials and methods     22-23
1.1 field survey     22 < br /> 1.2 pathogens purification     22
1.3 Fusarium identification     22-23
1.4 pathogenicity test     23
1.4.1 onion seeds plate method pathogenicity test     23
1.4.2 onion bulbs pathogenicity test     23
2 Results and analysis     23-28
2.1 Onion base plate rot field findings and symptoms     23-24
2.2 Indoor identification results     24-25
2.3 pathogenicity test plate onion seeds     25 - 26
2.4 onion bulbs pathogenicity test     26-28
3 discussion     28-29
Chapter Three different varieties of onion rot resistance of the base plate     29-37
1 Materials and methods     29-30
1.1 bacteria sources     29
1.2 tested varieties     29
1.3 for the test method     29-30
2 Results and analysis     30-35
3 discussion     35-37
Chapter four kinds of sterilization agent on the base plate rot pathogen Onion Toxicity Measurement     37-42
1 Materials and methods     37-38
1.1 Test agents     37
1.2 for the test strains     37
1.3 medium     37-38
1.3.1 for the test pathogen precultured     37
1.3.2 Treatments     37
1.3.3 4 fungicides onion base plate rot pathogen growth     37-38
2 Results and analysis     38 -40
2.1 four kinds of fungicides inhibitory effect     38
2.2 virulence of four kinds of fungicides compared     38-40
3 Conclusion and discussion     40-42
Chapter Jiayuguan new town onion field chemical control     42-49
1.1 Basic base     42
1.2 for the test material     42
1.2.1. tested varieties     42
1.2.2 Test agents     42 < br /> 1.3 Experimental design     42-44
1.3.1 pharmaceutical processing design     42-43
1.3.2 Specific application methods     43-44
1.3.3 Standard fertilization     44
1.4. calculation formula     44-45
1.5 surveys and statistical analysis     45
2, Results and Analysis     45-48
3, Conclusion and discussion     48-49
Chapter VI the main conclusions     49-51
1 onion base plate rot pathogen Identification     49
2 different varieties of onion rot on the base plate Resistance     49
3 Fungicides and Indoor Virulence     49-50
4 Jiayuguan new town onion field chemical control     50-51
Thanks     51-52
References     52-61
Author Biography     61-62
Instructors     62-63

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Horticultural Crops Pest and Disease Control > Vegetable pests > Bulb pests and diseases
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