The effects of herbicide and fungicide treatments on the growth and provitamin a content of lettuce

Rouchaud, Jean; Moons, Chantal; Meyer, Jean-Arcady

doi:10.1002/ps.2780160112

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…There have been no published reports of the effects of DBU on the gas exchange of higher plants, but DBU decreased the dry matter production and shoot height of cucumber (Shilling et al, 1994). This corroborates reports that Benlate DF can decrease the mass of a variety of species (Cole et al, 1970;Ishii, 1973;Reyes, 1975;Rouchaud et al, 1985;Schreiber and Hock, 1975). Wensley (1972) and Wensley and Huang (1970) report that benomyl suppresses growth of muskmelon for 12 to 14 d, but that plants recover eventually.…”

Section: Discussionsupporting

confidence: 79%

“…Benomyl reduced the growth of cucumber (Cucumis sativus L.), loblolly pine (Pinus taeda L.), lettuce (Lactuca sativa L.), American elm (Ulmus americana L.), marigold (Tagetes sp. ), and sycamore (Platanus occidentalis L.) (Rouchaud et al, 1985;Schreiber and Hock, 1975;Stumpff and South, 1991;Woo and Wick, 1995). Not all species seem to be equally sensitive to benomyl.…”

mentioning

confidence: 99%

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Phytotoxic Effects of Benzimidazole Fungicides on Bedding Plants

Iersel¹,

Bugbee²

1996

jashs

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Benzimidazoles are effective and widely used fungicides, but they may be phytotoxic. We studied the effects of a single drench application of six benzimidazoles and one acetanilide fungicide on photosynthetic gas exchange, growth, development, and nutrient levels of four species of bedding plants in twenty growth-chamber and four greenhouse studies. Daily carbon gain and carbon-use efficiency were calculated from continuous crop gas-exchange measurements in the growth chambers. The maximum labeled rate of Benlate DF caused a 7- to 10-day decrease in net photosynthesis and daily carbon gain in transplants of all species. It also caused pronounced interveinal chlorosis and a 2- to 3-day delay in flowering. Growth of Benlate DF-treated plants was reduced more at high (90%) than at low (60% to 80%) relative humidity. Benlate DF had severe effects on 2-week-old petunia (Petunia ×hybrida) seedlings in plug flats, reducing photosynthesis 25% to 57%. Cleary's 3336 WP decreased photosynthesis in some trials. Benlate DF reduced photosynthesis within 24 hours, but 3336 WP effects did not become apparent until 1 week after the treatment. This suggests different modes of inhibition. 3336 WP also caused leaf-tip and marginal chlorosis in impatiens (Impatiens wallerana). Mertect 340-F was extremely phytotoxic but is not labeled for drench applications (it was included because of its chemical similarity to other benzimidazoles). The only benzimidazole fungicide that did not reduce photosynthesis was Derosal, but it caused slight interveinal chlorosis in some studies with petunia. Benlate DF and Derosal decreased leaf Ca levels. Subdue (or metalaxyl), an acetanilide fungicide, did not affect photosynthesis or cause any visual symptoms. Our results indicate that some benzimidazole fungicides can cause growth reductions and visual damage in bedding plants.

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Section: Discussionsupporting

confidence: 79%

mentioning

confidence: 99%

Phytotoxic Effects of Benzimidazole Fungicides on Bedding Plants

Iersel¹,

Bugbee²

1996

jashs

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“…Nevertheless, some benzimidazoles can be phytotoxic. For example, benomyl reduced the growth of cucumber (6), lettuce (7), and loblolly pine and other species (8). In addition, benomyl reportedly caused vein discoloration in Swedish ivy (9), whereas tomato seedlings became chlorotic and stunted at higher rates (10).…”

Section: Introductionmentioning

confidence: 99%

Is the Application of Carbendazim Harmful to Healthy Plants? Evidence of Weak Phytotoxicity in Tobacco

García

Ruiz

Rivero

et al. 2001

J. Agric. Food Chem.

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To understand the phytotoxic effects that certain bezimidazole fungicides exert on plant growth, the aim of the present study was to determine the effect of the fungicide carbendazim, on foliar biomass, pigment content, and nutrient levels in tobacco plants (Nicotiana tabacum L. cv. Tennessee 86). The fungicide applied was carbendazim with a purity of 100%, at three different rates: 1.3 mM (carb1), 2.6 mM (the recommended concentration, carb2), and 5.2 mM (carb3). The control treatment was without carbendazim. The application of dosages of this fungicide lower than recommended (1.3 mM) resulted, on the one hand, in greater dry weight and, on the other, higher carotenoid concentrations, as well as higher N and K concentrations with respect to control. On the contrary, the application of the carbendazim dosage higher than recommended (5.2 mM) caused a decrease in dry weight and in all of the foliar pigments, as well as all of the nutrients, with respect to the other dosages and control. These results appear to indicate that besides its direct antibiotic action against pathogens, the effects of this fungicide in plants could be dangerous, especially at higher dosages. Nevertheless, the negative effects of carbendazim can be avoided by reducing the amount applied in current agriculture.

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“…Also, prolonged treatment with benomyl may cause an accumulation of cells with impaired cell division and binucleate cells, so that growth of the given tissue or organ would diminish. Rouchaud, Moons, and Meyer (1985) reported that Benlate at 0.75 kg active ingredient ha :" reduced lettuce fresh weight compared to untreated controls. Their data also indicated that longer exposure to Benlate produced a greater reduction in the fresh weight.…”

Section: Discussionmentioning

confidence: 99%

Effects of Benlate 50 DF on Microtubules of Cucumber Root Tip Cells and on Growth of Cucumber Seedlings

Woo

Wick

1995

American Journal of Botany

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The aim of this study was to determine whether the fungicide Benlate 50 DF has adverse effects on the microtubules of cucumber root tip cells and on growth ofthe young seedlings. Germinating cucumber seeds and young seedlings were exposed to six concentrations of Benlate ranging from I mg/liter to l Gg/liter. Although seed germination was not affected by Benlate, seedling growth, especially number and length of branch roots, was reduced in proportion to the concentration of Benlate and length of treatment. Significantly lower mitotic indices were obtained from root tips exposed to 0.1, 0.6, I, or 10 g/liter of Benlate. By means of immunofluorescence microscopy, the major microtubule arrays of root tip cells exposed to Benlate were compared and contrasted to those of controls. A few abnormalities in microtubule arrays were found at or after cytokinesis, and were of two types: I) persistence of phragmoplast microtubules; and 2) presence of an array of microtubules between two recently divided daughter nuclei in the plane that would normally be occupied by the new cell wall. These abnormalities are somewhat similar to those induced by caffeine, and, as with caffeine treatment, possibly reflect impaired or/and incomplete cytokinesis that results in production of binucleate cells. A few binucleate cells were observed in root tips exposed to l O g/liter of Benlate.

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The effects of herbicide and fungicide treatments on the growth and provitamin a content of lettuce

Cited by 6 publications

References 3 publications

Phytotoxic Effects of Benzimidazole Fungicides on Bedding Plants

Phytotoxic Effects of Benzimidazole Fungicides on Bedding Plants

Is the Application of Carbendazim Harmful to Healthy Plants? Evidence of Weak Phytotoxicity in Tobacco

Effects of Benlate 50 DF on Microtubules of Cucumber Root Tip Cells and on Growth of Cucumber Seedlings

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