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Efficacy of Some New Generation Insecticides and a Botanical Against Mustard Aphid and Their Toxicity to Coccinellid Predators and Foraging Honeybees

N. K. Dutta
Entomology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur

S. N. Alam
Entomology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur

M. Mahmudunnabi
Entomology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur

M. F. Khatun
Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh

Y. J. Kwon
School of Applied Biosciences, Kyungpook National University, Daegu, Korea

Abstract/ Executive Summary:

Field studies were carried out to evaluate the efficacy of four new generation insecticides along with a botanical against mustard aphid (Lipaphis erysimi Kalt.) and their toxicity to coccinellid beetles and foraging honeybees during 2014-15 at Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh. Buprofezin 40 SC was found to be the most effective against aphid offering the lowest aphid population (1.56/ top10cm central twig) at 7 days after spraying (DAS) which was statistically identical to Diafenthiuron 500 SC (1.85/ top10cm central twig). Among the treatments, Azadiractin 1 EC appeared to be safest to coccinellid beetles and foraging honeybees because it recorded the highest number of beetle (7.50 /5 plants) and honeybee (9.64 /plot/5 min) population at 7 DAS, although honeybee population did not vary statistically with that of Buprofezin 40 SC and Lufenuron 5 EC treated plots. Indoxacarb 145 SC was found to be the most toxic against honeybees. However, the highest yield was obtained from Buprofezin 40 SC (1.57 t ha^-1) treated plot although this was statistically identical to that Diafenthiuron 500 SC (1.52 t ha^-1) and Azadiractin 1EC (1.48 t ha^-1) treated plots.

Keywords: Mustard aphid, Predators, Honeybee, Insecticides, Neem product.

Location: Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh

Start Date: 00-00-2014

End Date: 00-00-2015

Program Area: Crop-Soil-Water Management

Commodity: Mustard

Objectives:

To evaluate some new generation and a botanical against aphids destroy mustard and their relative toxicity to coccinellid predators and foraging honeybees.

Methodology:

Data were analyzed by using MSTAT-C software for analysis of variance following randomized completely block design (RCBD) and treatment means were separated by applying Duncan’s Multiple Range Test (DMRT) at 5% level of significance. The research was carried out in experimental field of Bangladesh Agricultural Research Institute (BARI) during 2014-15.The land was well prepared by ploughing followed by laddering to ensure proper growth of mustard. The experiment was conducted in a complete randomized block design with 3 replications having plot size of 4 x 3m and spacing between row to row and plant to plant as 30 cm and 10 cm, respectively. The mustard cultivar BARI- Sarisha 14 was sown on November 10, 2014. There were five treatments including untreated control. Four new generation insecticides, Buprofezin 40 SC, Indoxacarb 145 SC, Lufenuron 5 EC and Diafenthiuron 500 SC along with a with botanical, Azadiractin 1 EC were evaluated to see their effectiveness against mustard aphid and relative toxicity to coccinellid predator and foraging honeybee. The test insecticides were applied twice as foliar spray with the help of an air compression high volume sprayer at spray volume rate of 500 L ha^-1. The first spray of insecticides was given when the aphid population reached ETL of 50 per plant (Bath & Singh, 1989) and second after an interval of 10 days. During spraying application care was taken to maintain the distance of 25 cm between the nozzle and plant parts in order to avoid plant damage due to strong spray fluid. The whole plant was thoroughly covered by spray fluid. Sprayer was washed and cleaned after each insecticide spray. All the standard agronomic practices were followed to raise a good crop. Manures and fertilizers were applied as per recommended dose.

Source of Information: Bangladesh J. Agril. Res. 41(4): 725-734, December 2016

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Safer and effective insecticides with varying modes of action targeting aphids are needed to relieve the selection for resistance resulting from the indiscriminate application of conventional chemical insecticides throughout the mustard growing regions of Bangladesh. So, from the present study, it could be concluded that, Azadiractin 1 EC (Bio neem plus) might be a viable component in mustard aphid IPM program. However, in case of severe infestation alternate spraying of Azadiractin 1 EC and Buprofezin 40 SC or Diafentiuron 500 SC could be adopted in a well designed IPM program against mustard aphid.

Knowledge Management: Journal