Neem, Azadirachta indica has
emerged as single most important
source of safe pesticides. More than
550 species of insects, 44
nematodes and almost equal number
of fungi and a few bacterial of
economic significance has been
reported susceptible to neem. Certain
key insect pests, viz., Helicoverpa
armigera, Bactrocera dorsalis, B.
cucurbitae, ldioscopus nitidulus,
Nilaparvatha lugens, cotton
bollworms, Chilo partellus and stored
grain pests such as Trogoderma
granarium, Collosoburchus chinensis
and Lasioderma sericorne have been
successfully managed by the neem
based pesticides.
emerged as single most important
source of safe pesticides. More than
550 species of insects, 44
nematodes and almost equal number
of fungi and a few bacterial of
economic significance has been
reported susceptible to neem. Certain
key insect pests, viz., Helicoverpa
armigera, Bactrocera dorsalis, B.
cucurbitae, ldioscopus nitidulus,
Nilaparvatha lugens, cotton
bollworms, Chilo partellus and stored
grain pests such as Trogoderma
granarium, Collosoburchus chinensis
and Lasioderma sericorne have been
successfully managed by the neem
based pesticides.
Neem oil volatiles evaluated for the first time exhibited high fumigant toxicity at a
incredibly low concentration against adults of Collosoburchus maculates, Corcyra
cephalonica, Sitotroga cerealella and Trogoderma granarium. Further research for
effective utilization of volatiles as substitute to synthetic fumigants is discussed.
incredibly low concentration against adults of Collosoburchus maculates, Corcyra
cephalonica, Sitotroga cerealella and Trogoderma granarium. Further research for
effective utilization of volatiles as substitute to synthetic fumigants is discussed.
| Neem Oil Pesticide |
Though, azadirachtin (AZ), a triterpenoid, has been shown to have properties
including feeding and ovipositional deterrence, repellency, growth disruption,
reduced fitness, and sterility in a number of species of insects, But recent studies
have shown that azadirachtin may not be the sole bioactive compound responsible
for nematoxicity but a mixture of neem chemicals may be acting together and that may
be the reason for crude extracts are more toxic to nematodes than the individual
chemicals. Nimbin and salamine are the other alkaloid which were found to reduce
the penetration of juveniles of Meloidgyne incognita. Neem based pesticides, in
general, are aimed at insect pests but for nematode control, the formulations have to
be for soil application, for seed dressing, for root dip etc., besides the spray types.
including feeding and ovipositional deterrence, repellency, growth disruption,
reduced fitness, and sterility in a number of species of insects, But recent studies
have shown that azadirachtin may not be the sole bioactive compound responsible
for nematoxicity but a mixture of neem chemicals may be acting together and that may
be the reason for crude extracts are more toxic to nematodes than the individual
chemicals. Nimbin and salamine are the other alkaloid which were found to reduce
the penetration of juveniles of Meloidgyne incognita. Neem based pesticides, in
general, are aimed at insect pests but for nematode control, the formulations have to
be for soil application, for seed dressing, for root dip etc., besides the spray types.
Neem Oil Pesticide