关键词: 阿维菌素;哒螨酮;剂量;甜菜碱;回收率

Abstract:

Avermectins and pyidaben are often applied to prevent Aceria pallida and Aculops lycii in Lycium barbarum L. in Ningxia as

acaricides. Betaine was extracted and the dust inside was removed by centrifugation. The content of betaine was determined by

new improved colorimetry, and the dynamics of effective component betaine in Barbary Wolfberry fruit was discussed after

applying avermectins and pyidaben by suggested dosage and doubling dosage. The result showed that the dynamics of betaine

contents remains the same after applying avermectins and pyidaben. The doubling dosage had a significant affect, the

concentration of betaine reached a peak value 3~5 days after application, then decreased to a level below normal one in 5~7

days, and got back slowly to contrast level in 7~14 days. The suggested dosages had few affect. All indicates that the dosage

of avermectins and pyidaben are the main reason that influenced the betaine dynamics. The average recovery rate of betaine

reclaimed by this method can reach 98.50%.

Key words: avermectins, pyidaben, dosage, betaine, recovery rate