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Effect of sublethal doses of abamectin on demographic traits of tomato leafminer Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae)

100%

Zibaee I., Esmaeily M.

Journal of Plant Protection Research

2017

tom 57

nr 3

The tomato leafminer, Tuta absoluta is a serious pest of tomato crops worldwide. In this study the effect of sublethal concentrations of abamectin (at 10 and 30% lethal concentrations, LC10 and LC30) was investigated on developmental and reproduction parameters of the tomato leafminer Tuta absoluta. Lethal concentrations were estimated by leaf dip bioassay on the fourth instar larvae of the T. absoluta that, LC50, LC30 and LC10 were 0.23, 0.15 and 0.12 mg · l–1, respectively. The sublethal concentrations led to significant decreases in adult emergence, the percentage of pupation of the parent generation, fecundity and adult longevity compared to the control. Sublethal concentrations significantly decreased the net reproductive rate (R0), intrinsic rate of increase (r), finite rate of increase (λ), and gross reproduction rate (GRR). There was a significant decrease in the time to egg developmental and doubling time (DT) of T. absoluta. However, sublethal concentrations of abamectin had no significant effects on the percentage of pupation, larva, prepupa and pupa developmental periods, hatchability and sex ratio of offspring. The results of this study indicated that sublethal concentrations of abamectin could influence some biological parameters of T. absoluta. The results could also be helpful for making better management decisions for controlling the tomato leafminer.

Evaluation of selected parameters of photosynthesis as herbicide stress indicators on the example of glyphosate

84%

Wysocki K., Banaszkiewicz T., Olszewski J.

Journal of Plant Protection Research

2018

tom 58

nr 3

This study was aimed at evaluating the effect of sublethal doses of glyphosate on physiological parameters of a common ornamental plant Mexican marigold (Tagetes erecta). The herbicide was applied in the following doses: 720 g ⋅ ha–1 (standard field dose), 144 g ⋅ ha–1, 28.8 g ⋅ ha–1, and 14.4 g ⋅ ha–1, in the form of a spraying treatment of plants in a specialist spraying chamber. The net assimilation rate and leaf greenness index were then determined. Herbicide application in the sublethal doses, i.e. below 720 g ⋅ ha–1, caused disorders in both analyzed physiological parameters of plants. The glyphosate dose of 144 g ⋅ ha–1 elicited transient disorders in the leaf greenness index. In turn, the use of the lower doses (28.8 g ⋅ ha–1 and 14.4 g ⋅ ha–1) caused a short-term increase in the net photosynthesis rate in the plants which was accompanied by a decreased value of the leaf greenness index. Study results demonstrated the effect of sublethal doses of glyphosate as a stress factor in parameters associated with the process of photosynthesis in plants.

Behavioral, morphological and histopathological effects of sublethal doses of quercetin on the species Polycelis felina (Dalyell)

67%

Rejevic N., Matkovic H., Gregorovic G., Kovacevic G., Knezovic L., Kalafatic M.

Folia Biologica

2013

tom 61

nr 1-2

Ograniczanie wyników

2 Journal of Plant Protection Research

1 Folia Biologica

1 Banaszkiewicz T.

1 Esmaeily M.

1 Gregorovic G.

1 Kalafatic M.

1 Knezovic L.

1 Kovacevic G.

1 Matkovic H.

1 Olszewski J.

1 Rejevic N.

1 Wysocki K.

1 Zibaee I.

1 2018

1 2017

1 2013

Wyniki wyszukiwania

Effect of sublethal doses of abamectin on demographic traits of tomato leafminer Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae)

Evaluation of selected parameters of photosynthesis as herbicide stress indicators on the example of glyphosate

Behavioral, morphological and histopathological effects of sublethal doses of quercetin on the species Polycelis felina (Dalyell)