Paper Title :Evaluation of Bio-Efficacy of Abamectin 0.5 % GR Against Rice Root-Knot Nematodes (Meloidogynegraminicola) and its Suitability in Nematode Outbreak Management
Author :S.R. Sarathchandra, D.M.O.K.B. Dissanayake, K.P.S.D. Hennayake, M.P.H.K. Jayaweera
Article Citation :S.R. Sarathchandra ,D.M.O.K.B. Dissanayake ,K.P.S.D. Hennayake ,M.P.H.K. Jayaweera ,
(2024 ) " Evaluation of Bio-Efficacy of Abamectin 0.5 % GR Against Rice Root-Knot Nematodes (Meloidogynegraminicola) and its Suitability in Nematode Outbreak Management " ,
International Journal of Advances in Science, Engineering and Technology(IJASEAT) ,
pp. 103-106,
Volume-12,Issue-1
Abstract : Rice root-knot nematodes, Meloidogynegraminicolais becoming a major threat in rice cultivation especially in Sri
Lanka. Abamectin is widely used to manage M. graminicola, but it is important to check its bio-efficacy which can be
recommended even in outbreak conditions. Therefore, this study was conducted to evaluate the bio-efficacy of Abamectin
0.5% GR. Before conducting bio-efficacy tests, a survey was conducted in 2022/2023 Maha season to observe the level of
nematode infestation in 9 selected areas where nematode infestations were prominent. The highest percentage of nematode
infestation/plantwas recorded in Mahaweli System B (44.8%) followed by Mahaweli System C (41.4%), and Kaluthara
(33.0%). Then testing of the bio-efficacy of Abamectin 0.5% GR against rice root-knot nematodeswas conducted in
greenhouse and field conditions. Two trials were conducted under greenhouse conditions as artificial inoculation and natural
infestation. It was observed that soil treated with Abamectin 0.5% GR (50 kg/ha) had a significantly lower gall development
in plants when compared to untreated control. In addition, the lowest number of live nematodes in 10 ml of extraction was
shown in Abamectin 0.5 % GR treated soil samples. The field trials were conducted in Mahaweli System B, Mahaweli
System C, and Kaluthara. The results indicated that Abamectin 0.5 % GR treated areas showed a significantly lower number
of live M. graminicola compared to their untreated control. The results further indicated that the Abamectin 0.5 % GR was
effective for the management of M. graminicola outbreak. Hence, it will be a greater finding for the rice farming community
and it will help to reduce rice crop loss thereby helping to strengthen the food security of the country.
Keywords - Abamectin 0.5 % GR, Artificial inoculation, Bio-efficacy, Outbreak, Rice root-knot nematodes
(Meloidogynegraminicola)
Type : Research paper
Published : Volume-12,Issue-1
DOIONLINE NO - IJASEAT-IRAJ-DOIONLINE-20702
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Copyright: © Institute of Research and Journals
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Published on 2024-07-01 |
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