Chemical control of weedy rice in precise hill-direct-seeded rice in South China

2013 ◽  
Vol 13 (1) ◽  
pp. 39-43 ◽  
Author(s):  
Xuefeng Shen ◽  
Xuhua Gao ◽  
A. Egrinya Eneji ◽  
Yong Chen
Keyword(s):  
South China ◽  
Chemical Control ◽  
Weedy Rice ◽  
Direct Seeded

scholarly journals Cross-Resistance to Imazapic and Imazapyr in a Weedy Rice (Oryza sativa) Biotype Found in Malaysia

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
M. DILIPKUMAR ◽  
N.R. BURGOS ◽  
T.S. CHUAH ◽  
S. ISMAIL
Keyword(s):  
Rice Field ◽  
Rice Cultivar ◽  
Management Tool ◽  
Cross Resistance ◽  
Weedy Rice ◽  
Effective Management ◽  
Herbicide Resistant ◽  
First Case ◽  
Direct Seeded ◽  
Selection Of

ABSTRACT: The Clearfield® rice production system is an effective management tool for weedy rice and other weeds in the direct-seeded rice culture. However, if farmers cultivating the Clearfield® rice disregard stewardship recommendations, the industry could face a problem of herbicide-resistant weedy rice which would occur through the selection of outcrosses. This study aimed to confirm imidazolinone-resistant weedy rice in Malaysia. The resistant weedy rice (R-WR) was found to be 67 fold more resistant to OnDuty® (premix of imazapic and imazapyr) than the susceptible weedy rice (S-WR) based on the GR50 values (rate that causes 50% inhibition of shoot growth). The Clearfield® rice cultivar was 32-fold more tolerant to OnDuty® than the S-WR. Furthermore, the R-WR was 54 and 89 fold more resistant to imazapic and imazapyr applied separately than the S-WR, respectively. The Clearfield® rice was 140- and 40-fold more tolerant to imazapic and imazapyr, respectively than the S-WR. The R-WR biotype was susceptible to non-selective herbicides glyphosate and glufosinate, as well as the selective graminicide quizalofop. Oxadiazon controlled the R-WR biotype, but pretilachlor was ineffective. The present study documented the first case of weedy rice that was cross-resistant to imazapic and imazapyr in Malaysian Clearfield® rice field.

Impact of weedy rice populations on the growth and yield of direct-seeded and transplanted rice

2007 ◽  
Vol 7 (2) ◽  
pp. 97-104 ◽  
Author(s):  
QIAN JIN CAO ◽  
BO LI ◽  
ZHI PING SONG ◽  
XING XING CAI ◽  
BAO-RONG LU
Keyword(s):  
Growth And Yield ◽  
Weedy Rice ◽  
Transplanted Rice ◽  
Direct Seeded

scholarly journals Feasibility of Improving Cucumber Yield without Chemical Control in Soils Susceptible to Nematode Buildup

HortScience ◽  
1994 ◽  
Vol 29 (10) ◽  
pp. 1136-1138 ◽  
Author(s):  
H.Y. Hanna ◽  
P.D. Colyer ◽  
T.L. Kirkpatrick ◽  
D.J. Romaine ◽  
P.R. Vernon
Keyword(s):  
Chemical Control ◽  
Total Yield ◽  
Dry Weight ◽  
Growth And Yield ◽  
Stem Length ◽  
Yield Response ◽  
Root Knot Nematode ◽  
Double Cropping ◽  
Direct Seeded ◽  
Cucumber Yield

Studies were conducted for 2 years in root-knot-nematode-infested soils to determine growth and yield response of `Dasher II' cucumbers (Cucumis sativus L.) to double-cropping with nematode-resistant tomatoes (Lycopersicon esculentum Mill.), using nematode-free cucumber transplants and preplant treatment with ethoprop nematicide. Cucumbers grown following the nematode-resistant `Celebrity' tomato during the same season produced significantly more plant dry weight, more fruit per plant, and higher premium and total yields than did cucumbers double-cropped with the nematode-susceptible `Heatwave' tomato in both years. The cucumber produced longer stems in 1992 and fewer culls in 1993 following resistant tomatoes. Cucumber plants raised in nematode-free soilless mix for 3 weeks before transplanting produced significantly longer stems and more plant dry weight than did direct-seeded cucumbers in 1992, but not in 1993; however, they produced significantly higher premium yield in both years, and higher total yield, more fruit per plant, and fewer culls in 1993. Preplant treatment with ethoprop significantly increased cucumber stem length, dry weight, premium and total yield, and number of fruit per plant in 1992 but not in 1993. Ethoprop treatment had no effect on the percentage of culls in either year. Chemical name used: O-ethyl S,S-dipropyl phosphorodithioate (ethoprop).

scholarly journals Performance of Dry Direct Seeded Rice and Weeds on Sesbania Brown Manuring as Compared to Farmers’ Practice and Chemical Control Method

2018 ◽  
Vol 6 (3) ◽  
pp. 265-269
Author(s):  
Sunil Kumar Chaudhary ◽  
Santosh Marahatta ◽  
Manisha Chaudhary
Keyword(s):  
Weed Management ◽  
Chemical Control ◽  
Management Practices ◽  
Control Method ◽  
Management Practice ◽  
Block Design ◽  
Effective Control ◽  
Direct Seeded ◽  
Hand Weeding ◽  
The Individual

The research was conducted to study the comparison of farmers’ weed management practice in rice with chemical control and Sesbania co-culture. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications and five different weed management practices. The five treatments were Farmers’ practice (two hand weeding first at 28 DAS and another at 40 DAS), Chemical practice (Bispyribac sodium as post emergence @ 25 g a.i. ha-1 at 25 DAS), Sesbania co-culture (100 kg Sesbania ha-1 and knocking down at 28 DAS), Weed free (Hand removal of weeds at 10 days’ interval) and Weedy check (No weed management). The individual plot size was 5 x 4 m2. The Sesbania co-culture and farmers’ practice were found more or less similar performance for all observed parameters but as better as compared to weedy check and chemical treatment. Sesbania co-culture was found less costly than farmers’ practice for weed management. The experiment clearly demonstrated the importance of brown manuring on effective control of weeds in rice field under dry direct seeded rice.Int. J. Appl. Sci. Biotechnol. Vol 6(3): 265-269

Chemical control of parthenium weed (Parthenium hysterophorus L.) in two contrasting cultivars of rice under direct-seeded conditions

2019 ◽  
Vol 117 ◽  
pp. 26-36 ◽  
Author(s):  
Ali Ahsan Bajwa ◽  
Aman Ullah ◽  
Muhammad Farooq ◽  
Bhagirath Singh Chauhan ◽  
Steve Adkins
Keyword(s):  
Chemical Control ◽  
Parthenium Hysterophorus ◽  
Direct Seeded ◽  
Parthenium Weed

Weedy rice: An expanding problem in direct‐seeded rice in the Philippines

2020 ◽  
Vol 20 (2) ◽  
pp. 27-37
Author(s):  
Leylani M. Juliano ◽  
Dindo King M. Donayre ◽  
Edwin C. Martin ◽  
Jesusa C. Beltran
Keyword(s):  
The Philippines ◽  
Weedy Rice ◽  
Direct Seeded

Benefits of mechanized deep placement of nitrogen fertilizer in direct-seeded rice in South China

2017 ◽  
Vol 203 ◽  
pp. 139-149 ◽  
Author(s):  
Shenggang Pan ◽  
Xiangcheng Wen ◽  
Zaiman Wang ◽  
Umair Ashraf ◽  
Hua Tian ◽  
...  
Keyword(s):  
South China ◽  
Nitrogen Fertilizer ◽  
Deep Placement ◽  
Direct Seeded

scholarly journals Interactive Effect of Weeding Regimes, Rice Cultivars, and Seeding Rates Influence the Rice-Weed Competition under Dry Direct-Seeded Condition

2020 ◽  
Vol 13 (1) ◽  
pp. 317
Author(s):  
Sharif Ahmed ◽  
M. Jahangir Alam ◽  
Akbar Hossain ◽  
A. K. M. Mominul Islam ◽  
Tahir H. Awan ◽  
...  
Keyword(s):  
Weed Management ◽  
Oryza Sativa L ◽  
Interactive Effect ◽  
Rice Production ◽  
Weedy Rice ◽  
Rice Grain ◽  
Rice Cultivars ◽  
Seeding Rate ◽  
Direct Seeded ◽  
Hybrid Cultivar

Dry direct-seeded rice (Oryza sativa L.), a climate-smart and resource-efficient (labor and water) rice production technology is gaining popularity in many parts of Asian countries; however, weeds are the major constraints for its early establishment and optimum productivity. Chemical weed management is effective, rapid, and also decreases weed management costs in dry direct-seeded rice (DSR) system; however, chemical use for weed management have a negative effect on the environment and also have human health hazards. Therefore, integrated weed management (IWM) is the best option for the sustainability of rice production under the DSR system. Improving competitiveness against weeds, weed-competitive rice cultivars, and high seeding rates were found to be the most promising IWM strategies in DSR. In this context, a field study was conducted to evaluate the weed competitiveness of rice cultivars and seeding rates on the performance of aus rice in dry direct-seeded systems in Bangladesh. Three inbred rice cultivars (CV), namely “BRRI dhan26”, “BRRI dhan48”, and “BRRI dhan55”, and one hybrid cultivar, “Arize” were tested in a seeding rate (SR) of 20, 40, and 80 kg ha−1 under two weeding regimes (WR) of weed-free and partially-weedy. Rice grain yield was strongly affected (p < 0.01) by the interactions of WR, CV, and SR. In weed-free conditions, the yield of all three inbred cultivars was increased up to SR of 40 kg ha−1 and for the hybrid cultivar, up to SR of 20 kg ha−1, and with further increment of SR, there was no yield advantage. Conversely, under partially weedy conditions, the yield of three inbred cultivars increased up to SR of 80 kg ha−1; however, for the hybrid cultivar, this increment was up to SR of 40 kg ha−1 and thereafter, no yield gain. In weedy conditions, the higher SR compensates for the yield losses by increasing the competitiveness of rice with weeds. Across SR, the hybrid cultivar had a significantly (p < 0.01) higher weed competitive index (WCI) than all the inbred cultivars and the highest SR always had a higher WCI.

Sign in / Sign up

Export Citation Format

Share Document