Characterization of tadpole shrimp (Triops longicaudatus) injury to rice and its effect on rice seedling establishment

2016 ◽  
Author(s):  
Luis Espino
Keyword(s):  
Seedling Establishment ◽  
Rice Seedling ◽  
Triops Longicaudatus ◽  
Tadpole Shrimp

scholarly journals Isolation and characterization of arsenic resistant soil bacteria and their effects on germination of rice under arsenic contamination

2015 ◽  
Vol 2 (2) ◽  
pp. 229-237
Author(s):  
Istiaq Ahmed ◽  
Md Tofazzal Islam ◽  
Md Akhter Hossain Chowdhury ◽  
Md Kamruzzaman
Keyword(s):  
Contaminated Soils ◽  
Sodium Arsenite ◽  
Agar Plate ◽  
Rice Seedling ◽  
Resistant Bacteria ◽  
Gram Staining ◽  
Isolation And Characterization ◽  
Resistant Strains

This study was carried out to isolate, screen and characterize arsenic (As) resistant bacteria from As contaminated soils of Dumrakandi and Matlab under Faridpur and Chandpur districts and to evaluate their efficiency in reducing As toxicity against rice seedlings during germination. Thirteen strains were isolated from the soils which showed resistance to different levels of sodium arsenite (viz. 5, 10, 20 and 40 mM) in both agar plate and broth assay using BSMY I media. Among the isolates, BTL0011, BTL0012, BTL0015 and BTL0022 showed highest resistance to 40 mM sodium arsenite. Gram staining and KOH solubility test revealed that five strains were gram positive and rest eight was gram negative. They grew well in the liquid media at pH 5.5 to 8.5. In-vitro rice seedling bioassay with two superior isolates (BTL0011 and BTL0022) revealed that As resistant strains significantly enhanced seed germination of BRRI dhan29 and BRRI dhan47 at 60 ppm As. This study was laid out in CRD with three replications. The performance of BTL 0022 was superior to BTL0011. The overall results suggest that BTL0011 and BTL0022 can be used for bioremediation of As contaminated soils and to increase the germination and seedling growth of rice in As contaminated soils.Res. Agric., Livest. Fish.2(2): 229-237, August 2015

Effect of Rice Winter Cultural Management Practices on the Size of the Hatching Population of Triops longicaudatus (Notostraca: Triopsidae) in California Rice Fields

2020 ◽  
Vol 113 (3) ◽  
pp. 1243-1247
Author(s):  
Joanna B Bloese ◽  
Kevin M Goding ◽  
Larry D Godfrey
Keyword(s):  
Rice Straw ◽  
Management Practices ◽  
Cultural Practices ◽  
Straw Decomposition ◽  
Cultural Management ◽  
Triops Longicaudatus ◽  
Rice Pest ◽  
Tadpole Shrimp ◽  
Winter Flooding ◽  
The University

Abstract The tadpole shrimp [Triops longicaudatus (Leconte)] has emerged as a significant pest of rice grown in California in recent decades. The change in T. longicaudatus’ pest status has coincided with changes in cultural management of residual rice straw postharvest. Policy changes have reduced the postharvest burning of fields from nearly 95% to less than 10%, promoting increased use of winter flooding as a means of accelerating straw decomposition. Field and laboratory trials were conducted from 2015 to 2017 at the Rice Experiment Station in Biggs, CA and in greenhouses at the University of California (UC) Davis to evaluate the effects of burning, flooding, and a fallow control on T. longicaudatus population dynamics. Experiments demonstrated that burning of rice straw failed to suppress densities of hatching T. longicaudatus and actually had the reverse effect, causing a 51% increase in numbers hatching, perhaps as a result of burning triggering termination of multiyear T. longicaudatus egg dormancy. Winter flooding had no measurable effect on T. longicaudatus hatch. Thus, these changes in winter cultural practices do not appear to be responsible for the emergence of T. longicaudatus as a major rice pest.

Application of 28Mg for characterization of Mg uptake in rice seedling under different pH conditions

2012 ◽  
Vol 296 (1) ◽  
pp. 531-534 ◽  
Author(s):  
N. I. Kobayashi ◽  
N. Iwata ◽  
T. Saito ◽  
H. Suzuki ◽  
R. Iwata ◽  
...  
Keyword(s):  
Rice Seedling ◽  
Ph Conditions
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