ScholarLens Back to search
2000•Indian journal of plant protectionOpen access

Effect of neem formulations on resurgence of brown planthopper, Nilaparvata lugens (Stal) under field conditions

N. V. Krishnaiah, I. C. Pasalu, Gururaj Katti, K. Mahesh Kumar, T. Lingaiah

Open full text 0 citations

Abstract

In field studies, neem formulations viz., Neemgold and Nimbecidine, which are oil based with low azadirachtin content (300 ppm) prevented the resurgence of rice brown planthopper (BPH) caused by a synthetic pyrethroid, deltamethrin (25 g a.i./ha). These oil based neem formulations were used at recommended concentration of 4% (12 ppm of azadirachtin) as tank mixing before spraying or as alternate applications with deltamethrin. Neem Azal T/S having 10, 000 ppm azadirachtin at 0.5% concentration (50 ppm of azadirachtin) could not prevent resurgence of BPH caused by deltamethrin in similar applications. The constituents other than azadirachtin present in oil based neem formulations appeared to be responsible for preventing resurgence of BPH caused by deltamethrin under field conditions in rice.

About this research paper

What this paper is about

In field studies, neem formulations viz., Neemgold and Nimbecidine, which are oil based with low azadirachtin content (300 ppm) prevented the resurgence of rice brown planthopper (BPH) caused by a synthetic pyrethroid, deltamethrin (25 g a.i./ha). These oil based neem formulations were used at recommended concentration of 4% (12 ppm of azadirachtin) as tank mixing before spraying or as alternate applications with deltamethrin. Neem Azal T/S having 10, 000 ppm azadirachtin at 0.5% concentration (50 ppm of azadirachtin) could not prevent resurgence of BPH caused by deltamethrin in similar applications. The constituents other than azadirachtin present in oil based neem formulations appeared to be responsible for preventing resurgence of BPH caused by deltamethrin under field conditions in rice.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

In field studies, neem formulations viz., Neemgold and Nimbecidine, which are oil based with low azadirachtin content (300 ppm) prevented the resurgence of rice brown planthopper (BPH) caused by a synthetic pyrethroid, deltamethrin (25 g a.i./ha). These oil based neem formulations were used at recommended concentration of 4% (12 ppm of azadirachtin) as tank mixing before spraying or as alternate applications with deltamethrin. Neem Azal T/S having 10, 000 ppm azadirachtin at 0.5% concentration (50 ppm of azadirachtin) could not prevent resurgence of BPH caused by deltamethrin in similar applications. The constituents other than azadirachtin present in oil based neem formulations appeared to be responsible for preventing resurgence of BPH caused by deltamethrin under field conditions in rice.

Key concepts: Azadirachtin, Brown planthopper, Neem oil, Deltamethrin, Pyrethroid, Toxicology, Planthopper, Chemistry

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Effect of neem formulations on resurgence of brown planthopper, Nilaparvata lugens (Stal) under field conditions — Research Paper | ScholarLens