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Crowfootgrass (Dactyloctenium aegyptium) germination and response to herbicides in the Philippines by Chauhan, Bhagirath Singh

“…Germination in the light/dark regime was greater at alternating day/night temperatures of 25/15 C (92%) than at 30/20 (70%) or 35/25 C (44%). …”
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Threelobe morningglory (Ipomoea triloba) germination and response to herbicides by Chauhan, Bhagirath Singh, Abugho, Seth Bernard

Subjects: “…2,4-d…”
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Phenotypic plasticity of spiny amaranth (Amaranthus spinosus) and longfruited primrose-willow (Ludwigia octovalvis) in response to rice interference by Chauhan, Bhagirath Singh, Abugho, Seth Bernard

“…At 9 wk after planting, for example, longfruited primrose-willow had 89 and 99% leaf biomass in the upper half of the plant when grown with 4 and 12 rice plants compared with only 34% when grown alone. …”
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Weedy rice (Oryza sativa) II. Response of weedy rice to seed burial and flooding depth by Chauhan, Bhagirath Singh

“…For the IWR accession, 0.5% of the seedlings emerged from 8-cm depth, whereas for the other three weedy rice accessions, no seedlings emerged from this depth. …”
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Growth response of itchgrass (Rottboellia cochinchinensis) to water stress by Chauhan, Bhagirath S.

“…With further increase in water stress, seed production was sharply reduced, but itchgrass was still able to produce an average of 63 and 9 seeds plant−1at 25 and 12.5% of field capacity, respectively. …”
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Effect of salinity on growth of barnyardgrass (Echinochloa crus-galli), horse purslane (Trianthema portulacastrum), junglerice (Echinochloa colona), and rice by Chauhan, Bhagirath S., Abugho, Seth B., Amas, Junrey C., Gregorio, Glenn B.

“…Salt stress can affect growth of crops as well as weeds. A study was conducted in a greenhouse to determine the effect of salinity (electrical conductivity [EC] of 1, 6, 12, 18, and 24 dS m−1) on growth of barnyardgrass, horse purslane, junglerice, and rice. …”
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Effect of crop residue on seedling emergence and growth of selected weed species in a sprinkler-irrigated zero-till dry-seeded rice system by Chauhan, Bhagirath S., Abugho, Seth B.

“…Crop residues acting as mulches can influence weed seedling emergence and weed biomass. A field study was conducted to evaluate the effect of rice residue amounts (0, 3, and 6 t ha−1) on seedling emergence of eight weed species in zero-till dry-seeded rice. …”
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Integrated weed management using planting pattern, cultivar, and herbicide in dry-seeded rice in northwest India by Mahajan, Gulshan, Poonia, Vikas, Chauhan, Bhagirath S.

Subjects: “…sowing…”
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Seed germination, seedling emergence, and response to herbicides of wild bushbean (Macroptilium lathyroides) by Chauhan, Bhagirath S., De Leon, Ma Jenina

“…Experiments were conducted in laboratory and screenhouse to determine the effects of light, temperature, salt and water stress, seed burial depth, and amount of rice residue on seed germination and seedling emergence of wild bushbean and to evaluate the response of that weed to commonly available POST herbicides in the Philippines. Germination (81 to 85%) was not influenced by light; however, it was higher at 30/20 C (88%) than at 25/15 C (82%) and 35/25 C (80%) day/night temperatures. …”
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Seed germination ecology of doveweed (Murdannia nudiflora) and its implication for management in dry-seeded rice by Ahmed, Sharif, Opeña, Jhoana L., Chauhan, Bhagirath S.

“…The highest germination (91%) was observed from the seeds sown on the soil surface and emergence decreased by 78, 86, and 92% when burial depths were increased to 0.5, 1, and 2 cm, respectively. …”
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Phenotypic plasticity of Chinese sprangletop (Leptochloa chinensis) in competition with seeded rice by Chauhan, Bhagirath S., Johnson, David E.

“…Chinese sprangletop, a C4species, is one of the most important grass weeds of seeded rice in Asia. …”
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Effects of planting pattern and cultivar on weed and crop growth in aerobic rice system by Mahajan, Gulshan, Chauhan, Bhagirath S.

“…Field experiments were conducted in Punjab, India, in the wet seasons of 2008 and 2009 to study the growth of weeds and two rice cultivars [PR 115 and Punjab (P.) Mehak 1] in relation to planting pattern (uniform rows [23-cm row spacing] and paired rows [15-, 30-, and 15-cm row spacings]) under aerobic conditions. …”
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Weed ecology and weed management strategies for dry-seeded rice in Asia by Chauhan, Bhagirath S.

Subjects: “…sowing rates…”
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Growth of purple nutsedge (Cyperus rotundus) in response to interference with direct-seeded rice by Chauhan, Bhagirath S., Opeña, Jhoana

“…On the same date, purple nutsedge aboveground shoot biomass was 26.8 g plant−1without interference, whereas in interference with 12 and 24 rice plants, purple nutsedge produced aboveground biomass of 4.8 and 2.2 g plant−1, respectively. …”
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Interaction of rice residue and PRE herbicides on emergence and biomass of four weed species by Chauhan, Bhagirath S., Abugho, Seth B.

“…Studies were conducted in a screenhouse to determine the interaction of rice residue as mulch (0, 3, and 6 t ha−1) and herbicides (nontreated, oxadiazon at 0.5 and 1.0 kg ai ha−1, and pendimethalin at 1.0 and 2.0 kg ai ha−1) on seedling emergence and biomass of barnyardgrass, crowfootgrass, junglerice, and rice flatsedge. …”
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Weed management strategies to reduce herbicide use in zero-till rice-wheat cropping systems of the Indo-Gangetic Plains by Kumar, Virender, Singh, Samar, Chhokar, Rajender S., Malik, Ram K., Brainard, Daniel C., Ladha, Jagdish K.

“…For ZT wheat, rice residue mulch (6 to 10 t ha−1) in combination with early sowing reduced emergence of littleseed canarygrass by over 80%. …”
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Weed management in mechanized-sown, zero-till dry-seeded rice by Chauhan, Bhagirath S., Abugho, Seth B.

Subjects: “…sowing…”
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Phenotypic plasticity of blistering ammannia (Ammannia baccifera) in competition with direct-seeded rice by Chauhan, Bhagirath Singh

Subjects: “…sowing rates…”
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Performance of different herbicides in a dry-seeded rice system in Sri Lanka by Chauhan, Bhagirath S., Abeysekara, Anuruddika S.K., Kulatunga, Sakinda D., Wickrama, Upali B.

Subjects: “…sowing…”
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Herbicide options for weed control in dry-seeded aromatic rice in India by Mahajan, Gulshan, Chauhan, Bhagirath S.

“…‘Punjab Mehak 1’. Results indicated that the single application of pendimethalin (750 g ai ha−1) PRE, pyrazosulfuron (15 g ai ha−1) PRE, bispyribac-sodium (25 g ai ha−1) POST, penoxsulam (25 g ai ha−1) POST, and azimsulfuron (20 g ai ha−1) POST reduced total weed biomass by 75, 68, 73, 70, and 72%, respectively, compared with the nontreated control at flowering stage of the crop. …”
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