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  1. Yezin Agricultural University
  2. Department of Entomology

Efficacy of Insecticides against Sweet Potato Whitefly, Bemisia tabaci (Genn), (Homoptera:Aleyrodidae) on Black gram (Vigna mungo L.)

http://hdl.handle.net/20.500.12678/0000000157
http://hdl.handle.net/20.500.12678/0000000157
74c81bcb-c805-46c6-84fc-21139511f849
b7d1b25e-646c-44cf-aa17-c851a1c2224c
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Lei Lei Wai tun (34-43).pdf (814 Kb)
Publication type
Journal article
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Publication
Title
Title Efficacy of Insecticides against Sweet Potato Whitefly, Bemisia tabaci (Genn), (Homoptera:Aleyrodidae) on Black gram (Vigna mungo L.)
Language en
Publication date 2019
Authors
Lai Wai Tun
Phyu Phyu San2
Htar Htar Naing
Yu Yu Min
Thi Tar Oo
Myint Thaung
Description
These experiments were conducted to evaluate the efficacy of chemical insecticides (used alone, combinations and different dosages) for the control of sweet potato whiteflies, Bemisia tabaci on black gram during winter and rainy season at Yezin Agricultural University Farm. A randomized complete block design was used with 13 treatments and five replications. Insecticide spray was initiated when adult whiteflies population exceeded the Economic Threshold Level (ETL) of 5 adults per leaf. In winter season, the highest season-long mean number of whiteflies population 3.85 adults/leaf was found in T13 (control plot) and followed by T4 (5 times spray) 3.31 adults/leaf. The lowest season long mean number of whiteflies population 2.18 adults/leaf was found in T7 (4 times spray) followed by T10 (4 times spray) 2.33 adults/leaf. In rainy season, the highest season-long mean number of whiteflies 1.85 adults/leaf was found in T6 (4 times spray) followed by T13 1.80 adults/leaf and the lowest 1.04 adults/leaf was found in T7 (2 times spray) followed by T4 (5 times spray) 1.24 adults/leaf. By comparing both seasons, the high-est season-long mean number of natural enemies was observed in T7 and the lowest in T10. Therefore, the result indicated that Pymetrozine 20% + Thiamethoxam 20% WG can be used as suitable insecticide with low population of whitefly and less harmful effect on natural enemies at vegetative stage of black gram. Appropriate time of insecticides application, less harmful effect on natural enemies and proper selection of suitable insecticides are essential in formulating an Integrated Pest Management (IPM) pro-gram for whiteflies.
Keywords
chemical insecticides, sweet potato whitefly, natural enemy
Identifier https://yauor-yau.archive.knowledgearc.net/handle/123456789/244
Journal articles
Yezin Agricultural University
6
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