Field Evaluation of Petroleum Spray Oil and Carbaryl Against<i>Tetranychus marianae</i>(Acari: Tetranichidae) on Eggplant

Reddy, Gadi V. P.; Miller, Ross H.

doi:10.1653/024.097.0115

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Though more than 20 insect and non-insect pests attack pepper plants, such as the yellow mite, which is also known as a broad mite, white mite and muranai mite, Polyphagotarsonemus latus (Banks) which is the most destructive among them (Alzoubi and Cobanogu, 2008). The major pests of this crop include several species of lepidopteran insects, whitefly, thrips, aphid and phytophagous mites, causing severe damages and substantial losses in crop yield (Srinivasan, 2009;Reddy and Miller, 2014). Since P. latus which is infesting different crops in Egypt has been recently raised to the pest status, the present work is intended to study the density of life cycle stages infesting six cultivars of pepper on a seasonal basis (Montasser et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Impact of Bifenthrin on Yellow Mite in Pepper Plants under Field Conditions at Wadi Al-Mollak, East Delta, Egypt

Morsy

Elwan

2022

Alexandria Science Exchange Journal

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Yellow mite, Polyphagotarsonemus latus (Banks) is the greatest destructive pest on pepper plants in Egypt. The efficacy of bifenthrin 25% EC against the yellow mite Polyphagotarsonemus latus (Banks) and its impact on natural enemies (predatory mites) were assessed through three field experiments conducted at Wadi Al-Mollak, East Delta, Egypt for three seasons. The treatments included bifenthrin applied at the rate of 40, 50, 60, 80, 100, 160 and 320g a.i.ha -1 compared with standard check dicofol at 290 g a.i.ha -1 and an untreated check. Obtained percentages of reduction in yellow and predatory mites were 1, 3, 5, 7, and 14 days after spraying. The initial population of mites/leaf before first spraying ranged from 3.83 to 4.91 in all the treatments without any significant difference. The dose of 80 g a.i.ha -1 of bifenthrin had a significant effect on the entire treatments units. The standard check dicofol at 290 g a.i.ha -1 recorded 71.81, 73.63 and 67.76% of reduction in mite population at first, second and third experiment after first spraying, respectively, and 74.76, 85.09 and 76.09% of reduction at first, second and third experiment after second spraying, respectively. The initial population of predatory mites, Amblyseius ovalis ranged from 0.70 to1.11 mites/leaf in the entire treatment. Dicofol at 290 g a.i.ha -1 caused the highest reduction of 49.77, 56.75 and 54.56 % in the first, second and third experiment, respectively. The lowest dose of bifenthrin at 40 g a.i.ha -1 was the least toxic treatment, The toxicity order for different bifenthrin doses against predatory mites and were 320 > 160 > 80 > 100 > 60 > 50 > 40 g a.i.ha-1. Dicofol was highly toxic to A. ovalis compared to bifenthrin treatments. Even after 14 days of spraying nearly 50% reduction was noticed in the case of dicofol. It can be conducted that bifenthrin was found to be relatively safer than dicofol because most likely due to its residues being longer than bifenthrin.

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Section: Introductionmentioning

confidence: 99%

Impact of Bifenthrin on Yellow Mite in Pepper Plants under Field Conditions at Wadi Al-Mollak, East Delta, Egypt

Morsy

Elwan

2022

Alexandria Science Exchange Journal

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“…Growers in the Mariana Islands use carbaryl and malathion insecticides to control T. marianae and H. armigera on eggplant and tomato (Reddy & Miller, 2014;Reddy & Tangtrakulwanich, 2013), and as many as 13-15 applications of these pesticides may be applied to each crop, greatly increasing both cost and exposure to pesticide residues. Furthermore, these applications do not effectively control these pests on tomatoes.…”

Section: Introductionmentioning

confidence: 99%

Module of Integrated Insect Pest Management on Tomato With Growers’ Participation

Reddy¹,

Tangtrakulwanich²

2014

JAS

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Tomato, Lycopersicum esculentum L. (Solanaceae), is an important vegetable crop in the Mariana Islands (Guam, Saipan, Rota and Tinian). Because tomato is heavily attacked by both the tomato fruitworm Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) and the red spider mite Tetranychus marianae McGregor, research was begun in 2011 to develop an integrated pest management program to better protect the crop from these pests. Our previous studies have indicated nominal threshold levels for T. marianae to be 8-12 mites/leaf in the dry season and 8-14 mites/leaf during the wet season, while for H. armigera the threshold was found to be 2 eggs per 10 of the plants, followed by an additional pesticide application only if 2 damaged fruit or H. armigera larvae were detected per 50 immature fruits. Other studies have found the IPM package used here of petroleum spray oil (PSO), BotaniGard, neem, and DiPel applied 15, 30, 45 and 60 days after tomato transplant to be a viable approach, significantly reducing the pest complex and giving higher tomato yield compared to both the growers' current practice (carbaryl or malathion, 15 applications per cropping season) and control plots. The current field study was conducted at two locations in Guam (Yigo and Inarajan), USA, in 2012 and 2013 to compare this IPM package with the growers' current practice in larger plots designed to educate the growers. The IPM package significantly lowered the pest complex and gave higher tomato yield at both the locations. Tomato growers were invited to attend an informal IPM training program on December 16, 2013 at the University of Guam, which was attended by 48 growers from four Mariana Islands. Of these growers, 41 (85%) were aware of and understood the risks associated with traditional insecticides and recognized the concept of using an IPM package in managing tomato pests before the workshop. However, all the attendees understood the concept and benefits of IPM after the workshop. Follow up with these tomato growers found that 35 (73%) later adopted the IPM program using PSO, BotaniGard, and Dipel at 15, 30, 45 and 60 DAT in the Mariana Islands.

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Field Evaluation of Petroleum Spray Oil and Carbaryl AgainstTetranychus marianae(Acari: Tetranichidae) on Eggplant

Cited by 2 publications

References 14 publications

Impact of Bifenthrin on Yellow Mite in Pepper Plants under Field Conditions at Wadi Al-Mollak, East Delta, Egypt

Impact of Bifenthrin on Yellow Mite in Pepper Plants under Field Conditions at Wadi Al-Mollak, East Delta, Egypt

Module of Integrated Insect Pest Management on Tomato With Growers’ Participation

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