Commelina benghalensis can be an annual or perennial herb. . soybeans, cotton, maize, sugarcane, cassava, peanuts, pineapples, cowpeas. While studying the fate of Commelina benghalensis L. after simulated rumen digestion, The seed produces a bread similar to corn bread, with a cocoa flavor . Zea mays (maize). Description. C. benghalensis belongs to a family with species with distinct characteristics. C. benghalensis has creeping stems.

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Weed interference on growth and yield of transgenic maize 1. I ; Barros, R. I ; Tuffi Santos, L.

Plants kept under competition tend to modify their morphology to optimize the use of production factors. This study aimed to evaluate the effects of competition between transgenic comemlina and five weed species on the growth and yield of transgenic maize hybrid.

Number of kernels, diameter and length of cob were not affected by competition with weeds. The weeds that most interfered with maize biomass production were S. Leaf dry mass accumulation was more sensitive than the production bengahlensis stem.

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It was observed that maize was usually very competitive with weeds, and there was a strong decrease in dry matter accumulation of all benghalehsis weeds in the study when in coexistence with the crop. One of the factors that negatively affect the yield of maize is weed interference, whereby weeds may directly compete with crops for nutrients, water, space and light, benghalebsis also indirectly, when they are alternative hosts to pathogens and insect pests, or when they hinder harvesting.

Genes of interest are inserted into genetically modified organisms, providing a given crop with benghalensie traits. In this context, the objective of the present study was to evaluate the effect of weeds in two densities on the yield and growth of transgenic maize hybrids.


They were subsequently transplanted to pots, where maize seedling emergence was taking place. The pots were watered three times a day throughout the experimental period, and fertilized according to the recommendations for maize crops Alves, Two densities in coexistence with maize were evaluated: The ears were collected and the following were measured: After determination of dry weight, total dry matter production between treatments and distribution in each organ were compared with total dry matter.

Number of kernels, diameter and length of ear were not influenced by association with Bidens pilosaCommelina benghalensisBrachiaria brizanthaSorghum arundinaceum and Ipomoea trilobaregardless of weed density. The coexistence of S. In the two densities, Commelina benghalensisBidens pilosa and Ipomoea triloba plants caused a small reduction in the shoot dry matter of maize, with no significant difference with the crop grown in monoculture.

Among the weed species studied, only for C. Maize plants in association with B. It should be noted that the transplanting technique was used for the weeds; thus, the size of maize plants and weeds was matched, when the weeds were inserted into the experimental plots. These results can be attributed to increased interspecific interference caused by the maize plant, even in association with twice as much population of weeds.

Leaf dry matter production of B. However, when grown in monoculture, B.

Thus, leaf dry matter production is reduced in competitive environments for these two species. The fact that stem dry matter accumulation was the same in the two densities, for plants grown in monoculture and begnhalensis competition with maize, can be attributed to greater stem development in the competitive environment. This was a strategy benghalensiis the weed in an attempt to overcome the shading imposed by the crop.

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This is indicative that the aforementioned variable is more sensitive to intraspecific competition in bengnalensis species than in S. The low stem dry matter production of C.

It should be noted that S. This faster cycle is an important tool for infestation of the area, although B. Weeds that interfered the most in dry matter production of maize were S. The leaf is the organ of the shoot with the most sensitivity to competition for both maize as well as weeds, leading to lower leaf dry matter accumulation in plants kept in coexistence.

Effects of nitrogen application and weed interference on performance of some tropical maize genotypes in Nigeria. Mechanisms of yield loss in maize caused by beghalensis competition. Acesso em 14 mar.

Weed interference on growth and yield of transgenic maize

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