Farmers of the eastern hills grow cabbage during off-season (April-October) period to the plains
for higher market prices but production during this period is risky with the potential losses to
insect pests: cabbage butterfly (Pieris brassicae L.), diamond back moths (Piutella xylostella L.)
and aphid (Brevicoryne brassicae L.). Considering this fact, an experiment in RCBD with three
replications was conducted to identify suitable chemical and botanical insecticides against cabbage
pests: diamond back moth (Piutella xylostella L.). cabbage butterfly (Pieris brassicae L.) and aphid
(Brevicoryne brassicae L.) at ARS, Pakhribas (1750 mas/) during 2008 and 2009 March-May
production with variety, "Green Coronet". Treatments included were Commercial azadirachtin
formulation (0.003 ·%}, Aqueous Melia azedarach leaf extract, Aqueous tobacco extract + soap,
Aqueous solution Acorus calamus rhizome powder/Deltamethrin 0.003%, Cypermethrin 0.025%,
Malathion 0.05%, Endosulfan 0.15%, Dichlorvos 0.075%, combination of botanicals and control.
The result showed that diamond back moth had developed resistance to Cypermethrin 0.025% due
to its use since a long time in vegetable cultivation. Melia azedarach leaf extract and Acarus
calamus rhizome extract are ineffective in controlling insect pests of cabbage. Application of either
of commercial azadirachtinformu/ation (0.003 %), Aqueous tobacco extract+ soap, Deltamethrin
0.003%, Malathion 0.05%, Endosulfan 0./5% and Dichlorvos 0.075% twice fortnightly: two
weeks after transplanting cabbage seedling provide sufficient protection from diamond back moth,
cabbage butterfly and aphid Alternate use of botanicals (Azadirachtin and tobacco) with chemical
pesticides (Deltamethrin, Endosulfan, Malathion and Dichlorovos) could be a better option to
reduce selection pressure on DBM larvae.

Farmers of the eastern hills grow cabbage during off-season (April-October) period to the plains
for higher market prices but production during this period is risky with the potential losses to
insect pests: cabbage butterfly (Pieris brassicae L.), diamond back moths (Piutella xylostella L.)
and aphid (Brevicoryne brassicae L.). Considering this fact, an experiment in RCBD with three
replications was conducted to identify suitable chemical and botanical insecticides against cabbage
pests: diamond back moth (Piutella xylostella L.). cabbage butterfly (Pieris brassicae L.) and aphid
(Brevicoryne brassicae L.) at ARS, Pakhribas (1750 mas/) during 2008 and 2009 March-May
production with variety, "Green Coronet". Treatments included were Commercial azadirachtin
formulation (0.003 ·%}, Aqueous Melia azedarach leaf extract, Aqueous tobacco extract + soap,
Aqueous solution Acorus calamus rhizome powder/Deltamethrin 0.003%, Cypermethrin 0.025%,
Malathion 0.05%, Endosulfan 0.15%, Dichlorvos 0.075%, combination of botanicals and control.
The result showed that diamond back moth had developed resistance to Cypermethrin 0.025% due
to its use since a long time in vegetable cultivation. Melia azedarach leaf extract and Acarus
calamus rhizome extract are ineffective in controlling insect pests of cabbage. Application of either
of commercial azadirachtinformu/ation (0.003 %), Aqueous tobacco extract+ soap, Deltamethrin
0.003%, Malathion 0.05%, Endosulfan 0./5% and Dichlorvos 0.075% twice fortnightly: two
weeks after transplanting cabbage seedling provide sufficient protection from diamond back moth,
cabbage butterfly and aphid Alternate use of botanicals (Azadirachtin and tobacco) with chemical
pesticides (Deltamethrin, Endosulfan, Malathion and Dichlorovos) could be a better option to
reduce selection pressure on DBM larvae.