Effects of 2,4-D on Inbred Lines and a Single Cross of Maize

Rossman, E. C.; Staniforth, David W.

doi:10.1104/pp.24.1.60

Cited by 20 publications

(20 citation statements)

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“…Six leaf plants were three to four weeks old, measured from emergence, and about one foot high to the tip of the longest leaf. These plants were beginning culm elongation and were at or near the point of tassel and ear-shoot differentiation which has been shown (3,8,10) to be generally susceptible to 2,4-D. In the present study this stage continued, in some instances at least, into what were classed as eight leaf plants.…”

Section: Discussionmentioning

confidence: 57%

“…The findings of ROSSMAN and STANIFORTH (8) that W22 and M14 were susceptible and WF9 and Os420 relatively tolerant to 2,4-D were used as a basis for selecting these particular strains.…”

Section: )mentioning

confidence: 99%

“…The tolerance of this plant varies with varieties, with season and probably with weather conditions (8,10). Yields are reduced by spraying just before tasseling, and sometimes by earlier sprays.…”

Section: )mentioning

confidence: 99%

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Brittleness and Other Responses of Corn to 2,4-Dichlorophenoxyacetic Acid

Rodgers

1952

Plant Physiol.

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Section: Discussionmentioning

confidence: 57%

“…The findings of ROSSMAN and STANIFORTH (8) that W22 and M14 were susceptible and WF9 and Os420 relatively tolerant to 2,4-D were used as a basis for selecting these particular strains.…”

Section: )mentioning

confidence: 99%

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Brittleness and Other Responses of Corn to 2,4-Dichlorophenoxyacetic Acid

Rodgers

1952

Plant Physiol.

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“…The first period occurred during the time of spike differentiation in the growing point; the second period began with anther and stigma differentiation and continued through the growth stages of the flowering parts. RossMAN and STANIFORTH (9) noted the occurrence of barren tassels in certain inbred lines of corn which had been treated with 2,4-D. They also reported severe reduction in seed set in corn following heavy applications of 2,4-D. RODGERS (8), working with inbreds and single crosses of corn, found that the stage of development of the corn plant was an important factor in the degree of injury resulting from treatment with 2,4-D.…”

mentioning

confidence: 98%

Effect of 2,4-Dichlorophenoxyacetic Acid on Meristematic Tissues of Corn

Staniforth

1952

Plant Physiol.

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In recent years the use of 2,4-dichlorophenoxyacetic acid (2,4-D) as a selective herbicide has become increasingly important in the production of small grains and corn. Yield reductions due to direct injury to the crops are usually small. However, severe yield reductions have occurred occasionally when 2,4-D was used at herbicidal dosages during certain stages of crop growth. Corn plants sprayed with 2,4-D may develop very brittle stems which may be broken off by wind, resulting in a reduction in stand and yield. In small grains the yield reductions are largely due to various abnormalities in the growth of the spike which result in fewer kernels of grain (3).A number of investigators (1,3,4,5,6,7,10,11) have reported varying abnormalities in plant growth and yield reductions resulting from the application of 2,4-D to spring-seeded wheat, oats and barley at various stages of growth. Yield reductions resulting from applications of 2,4-D are commonly associated with two critical periods in the growth of barley and wheat: (a) an early seedling period when the plants are one to five inches tall and (b) a later period extending from the early boot stage to a few days before heading. A similar though less distinct pattern has been observed in oats. ANDERSEN and HERMANSEN (1) found that the occurrence of spike abnormalities in oats, wheat and barley depended on the stage of development of the various plant parts at the time of treatment with 2,4-D. From this they concluded that the effect of the 2,4-D was on the differentiation of cells forming the first rudiments of a plant organ. DERSCHEID (3) working with oats and barley, showed that stage of growth of the crop plant at the time of application of 2,4-D was the most important single factor affecting subsequent injury as measured by yield of grain. He found that treatments of barley seedlings with 2,4-D reduced yields severely whenever the treatments were made during tiller bud differentiation and during floral initiation. The yield reductions were manifest by a reduction in numbers of tillers and spikes, and by a reduction in seeds per spike. When floral initiation was rapid, the yield reduction was severe only at one or two dates of treatment, but when the floral initiation was slow, the yield reductions were less severe at any one time, but reductions were found in more treatments. Floral initiation in the tillers occurred later than in the central culm of the plants.

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“…The ear growth phase is followed by four weeks of translocation and filling of the kernels to maximum size and -weight at 30 or 40%7 moisture (15) (14,17), but the tassels may blast in hot dry weather or pollen may be so short lived as to result in poor fertilization. BAIR and LooMIs (4) found germinating corn pollen very susceptible to either too much or too little moisture.…”

Section: Shaw and Loomis: Corn Yield Predictionmentioning

confidence: 99%