Hansenula anomalies sy1805 and its application in the preparation of mulberry borer attractant
A Hansenula anomaly, SY1805 technology, applied in the direction of attracting pests, applications, chemicals for biological control, etc., can solve the problems of single component, low specificity, complex extraction and preparation process, etc., and achieve the preparation process Simple, attractive, and promising effects
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Embodiment 1
[0029] Obtaining of Hansenula anomalies SY1805:
[0030] Screening of yeast strains:
[0031] 1. Preparation of culture medium:
[0032] YPD medium: peptone 20g; yeast extract powder 10g; glucose 20g; distilled water 1000mL; pH value 6.5.
[0033] PDA medium: potato 200g; glucose 20g; distilled water 1000ml; natural pH.
[0034] For solid medium, 1.5% agar was added on the basis of liquid medium, and all medium was sterilized at 115°C for 20 minutes.
[0035] 2. Preliminary screening: Take rhizosphere soil and decayed leaf samples in a mulberry garden in Ningnan County, Liangshan Prefecture, Sichuan Province, take 10g samples and add them to a triangular flask containing 100mL sterile saline, shake at 200r / min for 30min at 30°C The bacterial suspension was serially diluted with sterile normal saline, and an appropriate dilution was selected, spread on YPD plates (adding ampicillin), cultured at 30°C for 2-3 days, and observed the colony morphology. The colonies of suspecte...
Embodiment 2
[0047] Component analysis of wort and mulberry juice fermented by Hansenula anomalies SY1805:
[0048] The method described in Example 1 is used to make wort with a sugar content of 15°Brix, then add fresh mulberry juice of 20% (V / V) of the wort volume (directly squeezed and filtered by a juice extractor, without adding water), and inoculate the malt 5% of the juice volume of Hansenula anomalies SY1805 fermentation liquid (YPD liquid medium fermentation culture, OD 600 5.0), and then fermented for 72 hours at 30°C and 100r / min to obtain a fermentation broth.
[0049] The other group did not add mulberry juice, and directly fermented with wort, and the two groups of liquids did not need to be sterilized. The Y-type olfactometer described in Example 1 was used to test the lure of the two fermented liquids to the mulberry borer.
[0050] The results show that the fermented liquid containing mulberry juice has an attractive rate of 75% to the mulberry borer, which is higher tha...
Embodiment 3
[0052] Analysis of volatile components in mixed fermentation broth of Hansenula anomalies SY1805 wort and mulberry juice:
[0053] The odors of the two fermentation broths in Example 2 were identified by gas chromatography-mass spectrometry (GC-MS). Gas chromatography is Agilent 6890A, mass spectrometry is 5975C, DB-5 column (30m×0.25mm×0.25μm). The heating program is as follows: the furnace temperature is maintained at 40°C for 1 min, then raised to 120°C at 5°C / min and maintained for 2 minutes; then raised to 250°C at 10°C / min and maintained for 2 minutes. The mass spectrometer transmission line temperature is 250°C, the ion source temperature is 230°C, and the ion current is 70e V; the scanning range is 50-300m / z.
[0054] Table 1 shows that a total of 50 volatile compounds were detected in the volatile components of the two fermentation broths, including 21 esters, 4 alcohols, 4 acids, 2 ketones, 7 aldehydes, and 2 phenols , 10 other categories.
[0055] A total of 36 a...
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