Frankliniella Tritici Research Articles

Impact of Prey Age and Temperature on Predation by the Eastern Flower Thrips, Frankliniella tritici , 1 on Eggs of the Alfalfa Weevil 2

The first instance of predation on alfalfa weevil eggs, Hypera postica (Coleoptera: Curculionidae), by the eastern flower thrips, Frankliniella tritici (Thysanoptera: Thripidae) is reported. The age of the weevil eggs was found to have no effect on their predation by F. tritici , but predation was influenced by minimum temperatures.

Spatial and Seasonal Patterns of Phytophagous Thrips 1 in Soybean Fields with Comments on Sampling Techniques 2

Two species of phytophagous thrips, Sericothrips variabilis (Beach) and Frankliniella tritici (Fitch), colonized soybean plants in Urbana, Illinois, Lexington, Kentucky, and Columbia, Missouri. Numbers of these thrips generally did not vary significantly among plots nor among plants within plots. However, both species were unevenly distributed on the plants. All stages of F. tritici were concentrated in terminal buds and blossoms. Adults of S. variabilis were found most commonly on the uppermost fully expanded trifoliolate or the trifoliolate immediately below it. Larvae of S. variabilis were generally concentrated on the 3rd–6th trifoliolates below the terminal. Both species occurred in soybean fields throughout the growing season, but F. tritici was rare at Columbia. Populations of F. tritici peaked earlier than those of S. variabilis at Lexington and Urbana. Also, early season population densities of both species were generally higher and rates of population buildup and decline were more pronounced at the Kentucky site. Since soybeans appear to be most vulnerable to attack by S. variabilis between stages V1 and V6, sampling should be concentrated during the vegetative stages of the crop for most purposes. Although selection of sampling methods for estimating population density of both species depends on the purpose for sampling, primary consideration should be given to the parts of the plants from which the sample units are to be taken.

Sense organs on the antennae of two species of thrips (Thysanoptera, insecta)

AbstractThe antennae of two species of thrips, Bagnalliella yuccae (Hinds) and Frankliniella tritici (Fitch), have been examined with the light and electron microscopes. The antennal flagellum of both species is provided with tactile hairs, thick‐walled chemoreceptors and thin‐walled chemoreceptors. In addition, B. yuccae, but not F. tritici, has a single coeloconic chemoreceptor on the dorsal surface of the pedicel. Observations were made on the fluids in the lumen of the antennae of E. yuccae in the living insect. The movement of the fluids probably has an important physiological significance.

Influence of Reflective Mulches on Infestations of Liriomyza munda in Snap Bean Foliage13

Kring (1964) and Smith et at (1964) demonstrated that aphids are repelled by reflective aluminum surfaces, and this repellency was shown to be useful in reducing the incidence of aphid-borne virus diseases in squash (Moore et at 1964) and gladiolus (Johnson et al. 1967, Smith and Webb 1968). In addition, the aluminum repelled flower thrips, Frankliniella tritici (Fitch) (Ota and Smith 1965) and gladiolus thrips, Taeniothrips simplex (Morison) (Smith et al. 1972). Wolfenbarger and Moore (1968) reported that aluminum foil repelled green peach aphids, Myzus persicae (Sulzer), and leafminers, Liriomyza sp., in squash and tomato plots, but that honey bees, Apis mellifera L., and pickleworms, Diaphania nitidalis (Stoll), were attracted to the aluminum-mulched squash plots. Also, we (Smith and Webb 1969) found that melon aphids, Aphis gossypii Glover, were attracted to aluminum-mulched cucumber and muskmelon. Thus, though some insects are repelled by aluminum-mulched plots, other insect species may be attracted.

Repellent Mulches for Control of the Gladiolus Thrips 1

Reflective mulches reduced the aphid-borne cucumber mosaic virus in gladiolus by repelling the vectors, winged aphids (Aphididae) (Johnson et al. 1967) and also reduced the number of flower thrips, Frankliniella tritici (Fitch), and their damage to outdoor roses (Ota and Smith 1968). Therefore, experiments were conducted at Beltsville, Md., in 1970 and 1971 to test the repellency of aluminum and black-plastic soil mulches against the gladiolus thrips, Taeniothrips simplex (Morison), which damages the flowers.

Control of Certain Cotton Pests with a New Systemic Insecticide, UC-211491

An experimental systemic insecticide, Union Carbide UC-21149 (2-methyl-2- (methylthio) propionaldehyde O- (mcthylcarbamoyl) oxime), was compared with Di-Syston® ( 0,0 -dicthyl 5-[2- (ethylthio) ethyl] phosphorodithioate), and phorate in granular formulations applied at planting as in-furrow treatments for control of early-season cotton insects. Additional tests were conducted with UC-21149 as seed treatment or sidedress applied at various stages of cotton plant growth for control of the boll weevil, Anthonomus grandis Boheman. In the in-furrow treatments at planting, Di-Syston and phoratc adversely affected stands of cotton; but UC-21149 did not. UC-21149 was as effective as Di-Syston and phorate against a thrips complex [flower thrips, Frankliniella tritici (Fitch) ; F. exiguia Hood; tobacco thrips, F. fusca (Hinds); and grain thrips, Limothrips cerelium (Haliday)]; the cotton aphid, Aphis gossypii Glover; and an artificially induced infestation of the carmine spider mite, Tetranychus cinnabarinus (Boisduval). Mortality of overwintered boll weevils was significantly greater with UC-21149 and phorate than with Di-Syston. UC-21149 applied as a seed treatment reduced stands and was ineffective against the cotton aphid. Sidedress treatments produced significant mortality of boll weevil larvae developing within the squares and bolls, and of adults feeding on terminal growth. It also controlled the cotton aphid and carmine spider mite. However, UC-21149 was ineffective against the bollworm, Heliothis zea (Boddie), and cabbage looper, Trichoplusia ni (Hubner). Bollworms increased in 1 test, apparently owing to a lack of beneficial insects. Phytotoxicity was observed at the high rates shortly after treatment, but it did not appear to persist on subsequent plant growth.

The Use of Systemic Insecticides on Potted Chrysanthemums in the Greenhouse

Four series of experiments to control the two-spotted spider unite, Tetranychus telarius (L.), with systemic insecticides applied only on the soil show significant results. Test plants were potted chrysanthemums grown in a greenhouse under usual commercial conditions. Demeton at the rate of 32 milliliters of the commercial preparation in 32 gallons of water per 100 square feet of soil surface protected the plants from mites for approximately 5 weeks. Ten per cent phorate granules at the rate of 2.50 grams per 100 square feet required 1 week to become effective, but usually protected the plants from mites until blooms appeared. It was the most effective chemical tested in control of flower thrips, Frankliniella tritici (Fitch). Phosphamidon and Zectran® (4-dimethylarnino-3. 5-xylyl methylcarbamate) remained effective in control of mites for a shorter period of time than phorate, and a stronger dosage of granules of Di-Syston® ( O,O -diethyl S -[2-(ethy]thio)ethyl] phosphorodithioate) was required to control mites adequately. Dimethoate burned the plants severely at all concentrations used.

Foliage and Soil Treatments for the Control of Flower Thrips in Outdoor Roses

Weekly spray applications of phorate reduced populations of flower thrips (Frankliniella tritici (Fitch)) in outdoor roses up to 3 days after application. Similar spray applications of malathion were effective for 1 but not more than 2 days. Granulated phorate applied to the soil also reduced thrips populations in rose flowers.

Frankliniella tritici, a Non-Vector of the Spotted Wilt Virus1

Journal Article Frankliniella tritici, a Non-Vector of the Spotted Wilt Virus Get access K. Sakimura K. Sakimura Pineapple Research Institute, Honolulu, Hawaii Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 46, Issue 5, 1 October 1953, Pages 915–916, https://doi.org/10.1093/jee/46.5.915 Published: 01 October 1953

A Comparison of the Life Cycles of Frankliniella Tritici (Fitch), F. Fusca (Hinds) and Thrips Tabaci Lind. (Thysanoptera-Thripidae) in South Carolina

A Comparison of the Life Cycles of Frankliniella Tritici (Fitch), F. Fusca (Hinds) and Thrips Tabaci Lind. (Thysanoptera-Thripidae) in South Carolina