caa a22 4500 386375291 CHVBK 20180307112015.0 cr unu---uuuuu 161130e198908 xx s 000 0 eng 10.1017/S1742758400021597 doi S1742758400021597 pii (NATIONALLICENCE)cambridge-10.1017/S1742758400021597 Yield loss assessment and economic injury level for the leaf miner aproaerema modicella (Deventer) (Lepidoptera: Gelechiidae) on Soyabean in India [Elektronische Daten] In experiments to find the yield loss in soyabean due to the leaf miner, Aproaerema modicella (Deventer) and estimate the economic injury level (EIL), plants were infested at 30 and 45 days after sowing (DAS) with a fixed number of laboratory reared second instar larvae. Grain yield was not reduced by one larva per plant at both 30 and 45 DAS, but the yield reduction which ranged from 2.7 to 6.1% was significant with two larvae per plant at both the ages. With an increase in larval population, there was a corresponding decrease in yield to the extent of 40% and 66% with 10 larvae/plant at 30 and 45 DAS respectively. The regression of yield of leaf miner infestation indicated that yield was reduced by 0.463 and 0.716 g per plant for every larva per plant at 30 and 45 DAS respectively. Yield loss was greater in plants infested at 45 DAS than at 30 DAS with all populations tested. The estimated economic injury level for A. modicella is 0.6 larva/plant at 30 DAS, and 0.2 larva/plant at 45 DAS. The suggested economic threshold level in soyabean of 85-90 days duration is 0.5 larva/plant (1 larva/2 plants) at 30 DAS and 0.2 larva/plant (1 larva/5 plants) at 45 DAS. Copyright © ICIPE 1989 Leaf miner nationallicence Aproaerema modicella nationallicence economic injury level nationallicence yield loss nationallicence Mineur de feuille nationallicence Aproaerema modicella nationallicence niveau du dommage economique nationallicence perte du rendement nationallicence Kalayanasundaram M. Centre for Plant Protection Studies, Tamil Nadu Agriculture Unversity, Coimbatore 6410003, India Murugesan Sellammal Centre for Plant Protection Studies, Tamil Nadu Agriculture Unversity, Coimbatore 6410003, India International Journal of Tropical Insect Science Cambridge University Press 10/4(1989-08), 545-550 1742-7584 10:4<545 1989 10 JTI https://doi.org/10.1017/S1742758400021597 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1742758400021597 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kalayanasundaram M. Centre for Plant Protection Studies, Tamil Nadu Agriculture Unversity, Coimbatore 6410003, India NATIONALLICENCE 700 1- Murugesan Sellammal Centre for Plant Protection Studies, Tamil Nadu Agriculture Unversity, Coimbatore 6410003, India NATIONALLICENCE 773 0- International Journal of Tropical Insect Science Cambridge University Press 10/4(1989-08), 545-550 1742-7584 10:4<545 1989 10 JTI CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge