scholarly journals Acaricidal activity of juazeiro leaf extract against red spider mite in cotton plants

2017 ◽  
Vol 52 (7) ◽  
pp. 493-499
Author(s):  
José Cláudio Barros Ferraz ◽  
Cláudia Helena Cysneiros Matos ◽  
Carlos Romero Ferreira de Oliveira ◽  
Maria das Graças Rosa de Sá ◽  
Antônia Gilciléia Cunha da Conceição
Keyword(s):  
Cotton Plant ◽  
Aqueous Extract ◽  
Spider Mite ◽  
Cotton Leaf ◽  
Repellent Effect ◽  
Leaf Discs ◽  
Control Efficiency ◽  
Red Spider Mite ◽  
Significant Difference ◽  
Cotton Plants

Abstract: The objective of this work was to evaluate the toxicity, repellency, efficiency, and phytotoxicity of the aqueous extract of juazeiro (Ziziphus joazeiro) leaves in the control of the red spider mite, Tetranychus ludeni, on cotton plant. For toxicity evaluation, T. ludeni adult females were put on cotton leaf discs sprayed with the juazeiro extract. The repellent effect was verified in arenas that contained cotton leaf discs treated or not with the aqueous extract. The control efficiency of the juazeiro extract was evaluated by the infestation of cotton plants by adult female mites, followed by spraying with the extract. Measured LC50 was 3.54% (m/v), with 76.47% mortality and repellent effect. There was control efficiency for 120 hours, with 78.02% average, without significant difference between the evaluation intervals. Cotton plants did not show phytotoxicity. The juazeiro aqueous extract shows potential as an alternative control of T. ludeni on cotton plant due to its high toxicity, repellent effect, and efficiency in causing mortality, without being phytotoxic to cotton plants.

scholarly journals Verification of Efficacy of Bitoxybacillin/ Bacillus thuringiensis on Red Spider Mite, Tetranychusurticae on Cut Roses

2020 ◽  
Vol 1 (1) ◽  
pp. 32
Author(s):  
Kidist Teferra Yimame ◽  
Fikre Dubale Betree
Keyword(s):  
Global Economy ◽  
Spider Mite ◽  
Control Strategies ◽  
Addis Ababa ◽  
Original Data ◽  
Management Program ◽  
Flower Production ◽  
Red Spider Mite ◽  
Significant Difference ◽  
Untreated Check

Cut roses industries, new income resource in Ethiopia, most of flower industries are established near and around to Addis Ababa city, especially in west and east Shewa zones, most of flower enterprise established by foreigner, which is enhance global economy and creates jobs opportunity. Red spider mite, Tetranychusurticae is the major obstacles for flower production here in Ethiopia, in order to increase the quality and quantity of flower production need to plan different control strategies. Objective of this study was to evaluate the efficacy of these naturally occurring bacteria in controlling the red spider mite in rose flower farms. This experiment was donning on Menagesh, Gallica flower farm and the variety was Limbo flower, the application time was at flowering stage. Two rounds at the rate of 7ml/l by using Motorized knapsack sprayer for four consecutive months. The analysis of variance on mite count data after the application of Bitoxybacillin (Bt) and Abamectin 1.8%EC showed no significant difference (p>0.05) even after 21 days after the second spray (Table 1). However, the population density of the spider mite in Bt treated plots was very low in all sampling dates compared to the untreated check and Abamectin. The pest population (original data) after three weeks of the Bitoxybacillin applications was 68.1 per stem compared to Abamectin 1.8%EC (125.1) and control (110.57) indicating the registered miticide failed to suppress the mite population in roses. Bitoxybacill, would be advisable to have it registered in Ethiopia as alternative synthetic miticides for the control of red spider mite in Integrated Pest Management program.

Aqueous extracts of Duranta repens (Verbenaceae) as an alternative to control tea red spider mite, Oligonychus coffeae (Acari: Tetranychidae)

2016 ◽  
Vol 36 (02) ◽  
pp. 82-90 ◽  
Author(s):  
Somnath Roy ◽  
Narayanannair Muraleedharan ◽  
Gautam Handique ◽  
Azizur Rahman ◽  
Archita Barua
Keyword(s):  
Aqueous Extract ◽  
Spider Mite ◽  
Adult Mortality ◽  
Spray Method ◽  
Free Treatment ◽  
Red Spider Mite ◽  
Oil Formulation ◽  
Phytotoxic Effect ◽  
Synthetic Pesticide ◽  
Oligonychus Coffeae

AbstractWe evaluated an aqueous extract ofDuranta repensL. in the laboratory against the tea red spider mite,Oligonychus coffeaeNietner, to determine its effect on adult mortality, viability of eggs, oviposition deterrence and repellent properties. We also evaluated the same extract in the field to determine its effect on mite populations. The direct spray method was used in the laboratory at concentrations of 2, 4, 6, 8 and 10 g/l. Mortality ofO. coffeaewas dependent on both concentration and time after application. Deposition of eggs by adult mites on treated leaf surfaces decreased and the viability of eggs was also reduced. Its bioefficacy was comparable to that of the commonly used commercial neem oil formulation (azadirachtin 0.03EC). In addition, different concentrations of the aqueous extract ofD. repensalso exhibited repellent properties against adult mites. In the field, the application of the aqueous extract ofD. repensreduced the mite population and its bioefficacy was comparable to that of the synthetic pesticide Propargite 57 EC. No phytotoxic effect was observed when tea bushes were sprayed with different concentrations ofD. repens. Tea samples were taint free. Treatment of plants with the extract did not affect the quality (appearance of liquor, flavour, taint and taste) of made tea. Availability and distribution of this plant in and around tea growing areas of Assam, along with its processing, and the possibility of includingD. repensextracts in the current IPM programme are discussed.

scholarly journals EFFECT OF AQUEOUS EXTRACT OF Prosopis juliflora ON THE CONTROL OF THE MITE Tetranychus bastosi IN PHYSIC NUT

2018 ◽  
Vol 31 (4) ◽  
pp. 1054-1060
Author(s):  
MARIA DA PENHA MARTINS DO NASCIMENTO ◽  
CARLOS ROMERO FERREIRA DE OLIVEIRA ◽  
CLÁUDIA HELENA CYSNEIROS MATOS ◽  
CÉSAR AUGUSTE BADJI
Keyword(s):  
Aqueous Extract ◽  
Residual Effect ◽  
Prosopis Juliflora ◽  
Physic Nut ◽  
Water Control ◽  
Average Percentage ◽  
Control Efficiency ◽  
Significant Difference ◽  
Phytotoxic Effect ◽  
Upper Third

ABSTRACT The objective of this study was to evaluate the efficiency, phytotoxicity and residual effect of the aqueous extract of leaves of Prosopis juliflora (Sw.) DC (Fabaceae) for Tetranychus bastosi Tuttle, Baker & Sales (Acari: Tetranychidae) on Jatropha curcas L. (Euphorbiaceae). For the evaluation of the control efficiency, physic nut plants were infested with 30 adult mite females and after 12 days were sprayed with the lethal concentrations (m/v) of the extract (LC50 = 53.45% or CL90 = 85.35%) and with distilled water (control), which corresponded to the treatments. After 24, 48, 72, 96 and 120 hours after application of the extract, two leaves of the lower, middle and upper third of the plants were sampled and the live mites were counted per treatment. The evaluation of the residual effect was done three, 24, 48, 96, 192 and 288 hours after spraying. To evaluate the phytotoxic effect of the extract, scores were given according to the intensity of the symptoms in the plants. Control efficiency was verified throughout the evaluated period, with an average of 81.67% for LC50 and 73.05% for LC90, with no significant difference between the evaluation intervals. The extract had a low residual effect on T. bastosi, but at the end of 12 days the average percentage of oviposition reduction of mite was 49.21% and 68.86% for LC50 and LC90, respectively. The plants did not present phytotoxicity. P. juliflora extract presents potential for the alternative control of T. bastosi in physic nut due to its efficiency on the mortality of this mite, oviposition reduction of females and absence of phytotoxic effect in the plants.

Control of Spodoptera littoralis (Boisd.), Myzus persicae (Sulz.) and Tetranychus urticae (Koch) by cold storage and fumigation

1971 ◽  
Vol 61 (2) ◽  
pp. 235-240 ◽  
Author(s):  
D. F. Powell ◽  
K. G. Gostick
Keyword(s):  
Tetranychus Urticae ◽  
Myzus Persicae ◽  
Spodoptera Littoralis ◽  
Spider Mite ◽  
Cotton Leaf ◽  
Potato Aphid ◽  
Red Spider Mite ◽  
Tetranychus Urticae Koch ◽  
Egyptian Cotton ◽  
Peach Potato Aphid

In laboratory experiments, all stages of the Egyptian cotton-leaf worm (Spodoptera littoralis (Boisd.)) were killed by exposure at 1–2%C for ten days, but the peach-potato aphid (Myzus persicae (Sulz.)) and the red spider mite (Tetranychus urticae (Koch)) were not controlled by this treatment. When exposed to methyl bromide, all the S. littoralis eggs tested were killed by a concentration × time product (CTP) of 44 mg h/litre at 18%C, but control of all stages of M. persicae and T. urticae required a CTP of at least 88 mg h/litre.

scholarly journals Effects of Clonostachys rosea f. catenula Inoculum on the Composting of Cabbage Wastes and the Endophytic Activities of the Composted Material on Tomatoes and Red Spider Mite Infestation

2021 ◽  
Vol 9 (6) ◽  
pp. 1184
Author(s):  
Nomfusi Ntsobi ◽  
Morris Fanadzo ◽  
Marilize Le Roes-Hill ◽  
Felix Nchu
Keyword(s):  
Seed Germination ◽  
Spider Mite ◽  
Fungal Treatment ◽  
Tomato Seed ◽  
Clonostachys Rosea ◽  
Tomato Plants ◽  
Red Spider Mite ◽  
Phytotoxicity Test ◽  
The Difference ◽  
And Control

Globally, fungal inocula are being explored as agents for the optimization of composting processes. This research primarily evaluates the effects of inoculating organic vegetable heaps with the entomopathogenic fungus Clonostachys rosea f. catenula (Hypocreales) on the biophysicochemical properties of the end-product of composting. Six heaps of fresh cabbage (Brassica oleracea var. capitata) waste were inoculated with C. rosea f. catenula conidia and another six were not exposed to the fungus. The composted materials from the fungus- and control-treated heaps were subsequently used as a medium to cultivate tomatoes (Solanum lycopersicum). The biophysicochemical characteristics of the composted materials were also assessed after composting. In addition, the protective effect of the fungal inoculum against red spider mite (Tetranychus urticae) infestations in the tomatoes was evaluated through the determination of conidial colonization of the plant tissue and the number of plants infested by the insect. Furthermore, phytotoxicity tests were carried out post experiment. There were few significant variations (p < 0.05) in heap temperature or moisture level between treatments based on the weekly data. We found no significant differences in the levels of compost macronutrient and micronutrient constituents. Remarkably, the composted materials, when incorporated into a growth medium from fungus-treated heaps, induced a 100% endophytic tissue colonization in cultivated tomato plants. While fewer red spider mite infestations were observed in tomato plants grown in composted materials from fungus-treated heaps, the difference was not significant (χ2 = 0.96 and p = 0.32). The fungal treatment yielded composted materials that significantly (p < 0.05) enhanced tomato seed germination, and based on the phytotoxicity test, the composted samples from the heaps exposed to the C. rosea f. catenula inoculum were not toxic to tomato seeds and seedlings. In conclusion, this study showed that C. rosea f. catenula improved the quality of composted materials in terms of fungal endophytism and seed germination.

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