Action Threshold Treatment Regimens for Red Spider Mite (Acari: Tetranychidae) and Tomato Fruitworm (Lepidoptera: Noctuidae) on Tomato

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

“…Reddy et al (2013) reported that eggplant plots sprayed with petroleum spray oil (PSO) at a threshold of 2 or 4 mites/leaf in the dry season and at 2-8 mites/leaf during the wet season experienced significantly less leaf damage. Similarly on tomato, based on T. marianae infested leaves, the population density of and degree of plant damage caused by T. marianae on tomato was significantly reduced when experimental plots were sprayed at a threshold of 8-12 mites/leaf in the dry season and at 8-14 mites/leaf during the wet season (Reddy & Tangtrakulwanich 2013). Reddy & Bautista (2012) reported that combining the predatory mite Neoseiulus californicus (Evans) (Acari: Phytoseiidae) with petroleum spray oils (Volck® oil spray) produced significant control of T. marianae while not affecting the survival of N. californicus.…”

“…The climate of the Mariana Islands is hot and humid year round, resulting in high mite populations and severe damage to eggplant (Solanum melongena L.; Solanales: Solanaceae) and tomato (Solanum lycopersicum L.; Solanales: Solanaceae) (Reddy & Tangtrakulwanich 2013). Even low numbers of mites cause visible leaf damage on vegetables and ornamentals (Reddy & Bautista 2012).…”

“…Extensive webbing may cover leaves, twigs, and fruit, with leaves eventually dropping from the plant (Noronha 2006). Leaf loss may significantly reduce yields of eggplant and tomato Reddy & Tangtrakulwanich 2013).…”

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

“…Growers in the Mariana Islands (Guam, Saipan, Rota, and Tinian) have been encouraged to increase vegetable production, including tomato, to reduce the importation of vegetables to the region and thus avoid the possible introduction of invasive plant and insect species (Reddy & Tangtrakulwanich, 2013).Tomato growers who sell their products to local fresh markets mostly grow cherry tomatoes, which are grown in the Marianas year-round. In addition, tomatoes are traditionally grown as a backyard crop.…”

“…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.…”