Dissertation > Excellent graduate degree dissertation topics show

Studies on the Biology and Pesticide Resistance Mechanism of Tyrophagus Putrescentiae(Schrank)

Author: YuXiao
Tutor: FanQingHai
School: Fujian Agriculture and Forestry University
Course: Pesticides
Keywords: Putrescentiae Effective accumulated temperature Virulence Susceptible population. Resistant populations Resistance Mechanism
CLC: Q969.91
Type: Master's thesis
Year: 2002
Downloads: 80
Quote: 2
Read: Download Dissertation


Case ACARIDAE Acaridae putrescentiae Tyrophagus putrescentiae (Schrank) is the worldwide storage items and mushroom pest mites, dermatitis is also human, mite disease in the body and mite allergy major pathogen; distribution of a wide range of the feeding habits complex; the mites The individual tiny, easily infected through a variety of ways to cause significant harm to agricultural production and human health. This paper studies the effects of temperature on the growth and development of putrescentiae; initial establishment of the 15 kinds of commonly used pesticides and acaricides sensitive baseline; Indoor Selection of Resistance to explore the dynamic of the anti-phosphine putrescentiae development and its anti The tolerance mechanism; and to explore methods of prevention putrescentiae the detection countermeasures basis and control of anti-phosphine level resistance. The results showed that: 1. In the range of 12.5 ℃ ~ 30 ℃, the putrescentiae developmental stages (except the eggs and preoviposition) duration shortened with increasing temperature. Generation time period of 65.92 days, 12.5 ℃ and 30.0 ℃, only 10.99 days. The developmental duration D of each developmental stage regression of developmental rate V and temperature T relationship: the egg stage: D = 23.2750-0.7759T (R = -0.8917 * ), V = -0.1864 0.0208T (R = 0.9237 * ); larva period: D = 17.8350-0.5515T (R = -0.8741 * ), V = -0.0869 0.0147T (R = the .9290 * ); Section Ⅰ mites term D = 12.9850-0.4080T (R = -0.9231 * ) V = 0.2321 0.0267T (R = 0.9836 * * ); Section Ⅱ mites period: D = 24.1450-0.8204T (R = -0.8242 * ), V = -0.2315 0.0235T (R = 0.9643 ** < / sup>); whole generation: D = 85.7550-2.7841T (R = -0.8581 * ), V = -0.0343 0.0043T (R = 0.9721 ** ). 2. High temperature (30 ℃) and low temperature (12.5 ℃) fecundity adverse impact of hatching eggs is not obvious. 20 ℃ larva survival optimum temperature, and the temperature has little effect, but if the mite survival Ⅰ the first Ⅱ mite survival decreases with elevated temperature (12.5 ℃ ~ 30 ℃ range). 3. Putrescentiae each developmental stage of development starting point temperature and effective accumulated temperature: full generations (8.38 ± 1.51) ° C, 221.72 days; eggs (10.47 ± 2.31) ° C, 41.79 days; immature mites (8.09 ± 2.36) ℃ 58.06 days; Ⅰ If mites (9.09 ± 1.16) ℃, 36.27 days; Ⅱ if mites (10.59 ± 1.73) ° C, 39.53 degrees. Putrescentiae in Fuzhou year to complete 18 to 19 generations. 4.15 fungicides putrescentiae indoor virulence test results show that: the tested pesticides, the female mite has a killing effect, no effect on eggs. Female mite, the highest virulence insecticides turn more acaricidal Qi mite prime, abamectin and carbofuran nemesis, its LC 50 values ??as 0.2568mg L -1 , 0.8441mg · L -1 , 0.9114mg · L -1 and 6.8438mg L -1 The virulence of the lowest three fungicides order dichlorvos, Fujian Agriculture and Forestry University, master's degree in the righteous Xiao putrescentiae biology and resistance mechanism * to Trane Wo Lorsban, its LC. . Call 320.4793 mg · L, 126.9697 mm · L called and 109.0436 mg · LI. 5. Phosphine on the the sensitive populations putrescentiae fumigation virulence 28.4min, indoor Selection of Resistance to 16 generations, resistance increased to 4.75 times. The resistant populations LT. . Breeding algebra mouth regression curve equation is y = 3.5970 +21.1120 X (R = .9881). 6. The differences of the different populations in vivo protein content significantly, and the protein content gradually increased with the improvement of the level of resistance, resistant populations of the protein content of their resistance to multiple regression equation was y = .3953 +0.0909 X (= 0.9515). 7. One of the mechanisms putrescentiae anti-phosphine changes in the the body hug ester enzyme and phenone cholinesterase activity. Shuttle acid esterase phenone cholinesterase activity with resistance to raising the level of enhancement. The resistant populations Tsz acid esterase activity, B phenol cholinesterase than vitality and resistance ratios mouth regression curve equation were y = -7.1526 +7.6757 X (R = .9515). y = 0.0399 +0.0635 X (R = 0.9714).

Related Dissertations

  1. Isolation and Identification of Avian Pathogenic Escherichia Coli from Chicken and Characterizations of Its Virulence-Associated Genes,S852.61
  2. Transcriptional Regulation of Genes Encoding MFS by LysR in Vibrio Cholerae,R378
  3. Cloning and Function Analysis of crp and Tatc Gene from Erwinia Amylovora Strain Ncppb1665,S436.612
  4. Cloning and Fuctional Study of clp Gene of Xanthomonas Oryzae,S435.111.4
  5. Functional Analysis of Inhibitor of Apoptosis Protein Gene Cpbirl in Cryphonectria Parasitica,S436.64
  6. Genetic Structure of the Wheat Powdery Mildew Populations from Henan, Hubei and Chongqing Province (City),S435.121
  7. Resistance Mechanism of Major Commercial Rice Varieties to RSV and Construction of Trangenic Rice to Fight Against Virus,S511
  8. Functional Analysis of Inhibitor of Apoptosis Protein Gene Cpbir1 in Cryphonectria Parasitica,S436.64
  9. Virulence Factors of Enterococcus Faecalis Expression in the Biofilm of Starvation Phase and after Two Root Canal Conventional Drugs,R780.2
  10. Studies on Exploitation of Beauveria Bassiana Production and Control of Tow Main Pests,S476.1
  11. Soybean cyst nematode biocontrol efficacy screening and preliminary study on anti-,S435.651
  12. Pathogenic Vibrio parahaemolyticus analysis and internal standard PCR assay evaluation,TS254.7
  13. The Inhibition Effect of Nano-Silver on Plant Pathogenic Fungi,TB383.1
  14. Studies on the Inhibitory of Nano-silver to Plant Pathogenic Bacteria,TB383.1
  15. A Study on the Nox Storage-Reduction Catalysts of the BaCo1-xFexO3 Perovskite and the Supported Ba/Co/TiO2-ZrO2,O643.36
  16. Development of Multiplex PCR for Simultaneous Microarray Detection of Six Virulence Factors of Vibrio Anguillarum and Primary Exploration of Innovative Detection Technologies,S941
  17. Study on the Function of a Novel Virulence-related Factor MItD in Vibrio Anguillarum,S941
  18. A Research on Biological Characteristics and Occurrence Regularity of Semiothisa Cinerearia,S763.3
  19. Screening Bactericides for Control of Citrus Canker,S436.66
  20. Disease prevention pepper pharmaceutical screening test,S436.418
  21. Replace highly toxic pesticides to control rice stem borer technology research,S435.112.1

CLC: > Biological Sciences > Entomology > Applied Entomology (Economic Entomology ) > Ticks and mites SCIENCE
© 2012 www.DissertationTopic.Net  Mobile