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Technology Database  Agriculture SYSTEM OF ESTIMATION OF BACTERIAL INSECTICIDE QUALITY
SYSTEM
OF ESTIMATION OF BACTERIAL INSECTICIDE QUALITY
The system of estimation of the quality of
bacterial insecticides produced in Russia and Kazahstan differs from that used
in other countries. The quality of home-made preparations is controlled from the
spore titre; the biological activity is determined from the activity of
entobacterin taken as 1000 U/g. The quality indices of five home-made and nine
imported batches of bacterial insecticides on the base of ВТ were
compared by using international standards of the activity .
Two species of insects were used for the
determination of viable spore titre, biological activity as well as of a number
of physico-chemical parameters: moisture content, suspension stability and
dryness, etc.
In physico-chemical parameters, the home-made
preparations in a form of wetable powder differ profitably from dry imported
preparations.
No linear correlation is observed between spore
titre and biological activity.
|
Preparation |
ВТ
serotype |
Spore titre, (billiard/g) |
Biological activity |
|
LK-50,% |
IUA,u/mg
|
|
Lepidocid |
H-3 |
102,3 |
0,012 |
17400 |
|
Gomelin |
H-1 |
97,2 |
0,027 |
13400 |
|
Dendrobacillin(concentrated) |
H-4 |
101,3 |
0,042 |
5900 |
|
Bitoxibacillin |
H-1 |
48,5 . |
0,084 |
8300 |
|
Dipel |
H-3 |
37,6 |
- |
15400 |
|
Turicid |
H-3 |
47,0 |
- |
16600 |
|
Bactucid |
H-1 |
5,1 |
- |
10200 |
|
Toarol |
asporogenic |
- |
- |
28200 |
|
Standard HD-1990 |
H-3 |
69,4 |
- |
16000 |
The results presented can be used
for the certification of home-made biopreparations according to International
Unit System for the determination of biological activity.
Author: F.Sh.Isangalin.
Source: SciTecLibrary.ru
Publishing date: January 11, 2001
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