Journal of Tea Science Research. 2015, Vol. 5, No. 8, 1-7
3
acids), Neemakar (Neem, Karanja & Tulsi), Rescue
(
Vitex negundu
+
Clerodendron infortunatum)
and
Torpedo (
Sophora alopecuroides
+
Stemona sessilifolia)
against red spider mite,
Oligonychus coffeae
in tea.
Materials and Methods
An experiment was carried out to evaluate the bioefficacy
of some plant origin commercial biopesticides against
red spider mite
Oligonychus
coffeae
Nietner
(Acarina: Tetranychidae) infesting tea under both in
the Laboratory and main farm of Bangladesh Tea
Research Institute (BTRI), Srimangal, Moulvibazar
during the period from March 2013 to December 2014.
The red spider mite was collected from different
sections of BTRI main farm and reared in the
Entomology Laboratory, BTRI, at 27~30
℃
temperature,
70%~80% relative humidity and 16:8 hours light: dark
photoperiod on a susceptible tea clone, BT2 by
following detached leaf culture method of Helle and
Sabelis (1985) with slight modifications.
The test materials
Formulations of six commercial plant origin biopesticides
viz., Bio-Cawach, Karanza, Miticon, Neemakar, Rescue
and Torpedo were collected from different multinational
companies (Table 1).
Short descriptions of the commercial
biopesticides are enumerated below:
Bio-Cawach (
Pongamia pinnata
)
Bio-Cawach is a modern biopesticide based on
botanical extract of Karanja (
Pongamia pinnata
.
Karanjin is the active ingredient and is formulated as
4% emulsifiable concentrate (EC) i.e. 40,000 ppm. It
kills by choking the nervous system & gives prolonged
control. It is eco friendly, effective, economical & knock
down extract. It is compatible with all conventional
fungicides & insecticides (Anonymous, 2011).
Karanza (
Azadirachta indica
+
Pongamia pinnata
)
Karanza is a plant based broad spectrum pesticides
including insecticide, acaricide, nematicide, fungicide
and bactericide activity. It is composed of Neem
(
Azadirachta indica
) and Karanj (
Pongamia pinnata
)
together in farmer friendly EC formulation.
Miticon (various herbs, alkaloids and salt of fatty
acids)
Miticon is a broad spectrum eco-friendly pest controller
containing extracts of various herbs (alkaloids) and
salt of fatty acids, which are very helpful in
controlling a wide range of sucking pests. The product
is excellent against red spider mites and other mites in
tea. Miticon kills the pest by contact as well as by
stomach poison. It helps in removing the toxicity of
pest infestation. It is bio-degradable & does not leave
residue in made tea (Anonymous, 2011).
Neemakar (Neem, Karanja & Tulsi)
Neemakar is a unique composition of Neem, Karanja
& Tulsi supplied by Shakti Biotech, India. It i s
effective against all types sucking & chewing pests.
The active ingredient is 23000 ppm herbal extracts. It
disturbs the life cycle of pest by acting as antifeedant,
repellent & anti-ovipositor. No insect can develop
resistance against it. It also acts as insect growth
inhibitor (Anonymous, 2011).
Rescue (
Vitex negundu
+
Clerodendron infortunatum
)
Rescue is a powerful botanical formulation with
instant result to control red spider mites and other
mites. Rescue is the most modern botanical composition
of Indian Perivet Tree (
Vitex negundu
) and Hill Glory
Table 1 List of plant origin commercial biopesticides evaluated for miticidal activities against red spider mites in tea
Commercial Name
Technical Name
Manufacturer/Supplier Name
Bio-Cawach
Pongamia pinnata
Shakti Biotech, India
Karanza
Azadirachta indica
+
Pongamia pinnata
BioScience, India
Miticon
Various herbs (alkaloids)
Shakti Biotech, India
Neemakar
Neem, Karanja & Tulsi
Shakti Biotech, India
Rescue
Vitex negundu
+
Clerodendron infortunatum
Shakti Biotech, India
Torpedo
Sophora alopecuroides
+
Stemona sessilifolia
Shakti Biotech, India
