Aculops Lycopersici Research Articles

Reduction in Photosynthesis of Tomato Leaflets Caused by Tomato Russet Mite (Acari: Eriophyidae)

The reduction in net photosynthesis caused by tomato russet mite (TRM), Aculops lycopersici (Massee), feeding was measured. A significant relationship between net photosynthesis and mite-days per cm2 of leaflet was observed. Photosynthesis of healthy tomato leaflets did not increase to compensate for photosynthesis reduction in damaged leaflets. Studies suggest that destruction of guard cells and subsequent reduction of leaf gas exchange were responsible for photosynthesis reduction, and that no photosynthesis-reducing phytotoxin is present in TRM saliva.

Morphological Analysis of Damage to Tomato Leaflets by Tomato Russet Mite (Acari: Eriophyidae)

Morphological damage to tomato leaflets by tomato russet mite (TRM), Aculops lycopersici (Massee), was examined by tissue sectioning. Upper and lower epidermal cells were destroyed by mite feeding. A thickened layer of callous tissue formed adjacent to the parenchyma in regions of epidermal cell death. Underlying parenchyma cells were not damaged, probably due to the short stylet length of TRM. Epidermal cell damage was most prominent near the leaflet mid vein, extending laterally toward the margin. Studies suggested that as mite density on a tomato leaflet increased, the feeding activity of each individual mite was accelerated.

The Importance of Alternate Foods for the Mite Homeopronematus anconai (Acari: Tydeidae)

Population parameters of the tydeid mite Homeopronematus anconai (Baker) utilizing various food materials were determined. Mite densities increased rapidly when fed cattail pollen provided on a grape leaf substrate. On pollen in the absence of the leaf substrate, the population first declined and then slowly increased. Fungal spores were a poor food source, with or without leaf tissue. On grape leaf alone, mite numbers failed to increase. After 20 d of exposure to tomato russet mites (TRM), Aculops lycopersici (Massee), plus pollen, pollen alone, TRM alone, and with no food, H. anconai adult females had 39, 19, 10, and 0% survival, respectively, and the cumulative number of eggs per female was 8.1, 6.8, 1.5, and 0, respectively. Significantly more TRM were consumed per female H. anconai in the absence of pollen, which suggests pollen is of high nutritive value.

Comparative Toxicity of Acaricides to Aculops lycopersici and Homeopronematus anconai (Acari: Eriophyidae, Tydeidae)

Comparative toxicity of five acaricides to tomato russet mite (TRM), Aculops lycopersici (Massee), and to the predatory tydeid mite Homeopronematus anconai (Baker) was evaluated. Avermectin B1 was the most toxic material to TRM, followed in decreasing order by dicofol, cyhexatin, sulfur, and thuringiensin. Dicofol was the most toxic to H. anconai , followed in decreasing order by avermectin B1 sulfur; cyhexatin, and thuringiensin. Selective doses of avermectin B1 demonstrated good potential for control of TRM without reducing H. anconai numbers. Control of TRM with the other four acaricides most likely would reduce H. anconai population levels.

Feeding habits of the Tydeidae with evidence ofHomeopronematus anconai(Acari: Tydeidae) predation onAculops lycopersici(Acari: Eriophyidae)

Abstract A literature review of the Tydeidae indicated that feeding habits include predation, phytophagy, fungivory, and scavenging. In the current study, evidence for predation of Homeopronematus anconai (Baker) on Aculops lycopersici (Massee) is presented. The tydeid was able to reproduce after feeding on various life stages of the eriophyid mite. In laboratory experiments, significantly lower population densities of A. lycopersici developed on individual tomato leaflets and seedlings that had H. anconai present, compared to leaflets and seedlings void of H. anconai. In addition, H. anconai phytophagy (on pollen and leaf tissue) and fungivory (on Cladosporium cladosporoides) were observed.

Observation of Tomato Russet Mite (Acari: Eriophyidae) Damage Symptoms in Relation to Tomato Plant Development

Tomato russet mite, Aculops lycopersici (Massee), damage was surveyed in 536 fields in the Sacramento Valley of California from 1981 through 1984. Symptoms were observed in ca. 60% of the fields with no significant difference between years, locations, or irrigation type. A significantly greater frequency of damage symptoms was detected in early and middle plantings compared with later plantings. No consistent relationship was found between heat unit accumulation from seedling emergence to first detected damage symptoms for years or for category of seedling emergence date. A significant relationship was found for most years and all categories of seedling emergence dates between expression of damage symptoms and stage of plant growth. The most likely stages of plant growth at which damage symptoms would be expressed are when most plants have pink fruit or mature green tomatoes >2.5 cm.

Susceptibility of the tomato russet mite,Aculops lycopersici (Acari: Eriophyidae), in Egypt to methamidophos, pyridaphenthion, cypermethrin, dicofol and fenarimol

Resistance has developed in the tomato russet mite,Aculops lycopersici (Massee) to the organophosphate, methamidophos. Laboratory studies showed thatA. lycopersici which received methamidophos for 3 years was highly tolerant. In contrast, it was very susceptible to dicofol and pyridaphenthion, and susceptible to cypermethrin. Pyridaphenthion and dicofol had long residual activity whereas methamidophos and cypermethrin had shorter activity.

A new tomato pest in Çukurova, Aculops lycopersici (Massee), (Acarina: Eriophyidae).

Tomato russet mite, Aculops lycopersici (Massee) , was first detected in 1979 on tomato plants grown in open fields. !ts deseription, and the damage cansed by A. lycopersiCli were given. Precautions to prevent A. lycopersici from spreading and control measures were discussed,

Lepidopterous Larval Control on Tomatoes, 1980

Abstract An experimental tomato planting (VFN Bush) was transplanted Jun 17’80 at University of California South Coast Field Station. Insecticide treatments were replicated 4 times in a randomized complete block design. Replicates were 4 rows wide (5-ft centers) by 25 ft long with 5-ft buffer between replicates. Insecticides were applied weekly from Aug 12 through Sept 30 (8 applications) by a tractor-mounted boom sprayer with 6 nozzles per row at an operating pressure of 100 psi and delivery rate of 101 gal/acre. Nozzles were hollow cone, D2 orifice, 25 core and 50-mesh screen. All treatments included 0.04% spreader-sticker (Biofilm). All mature green, pink and red fruit were harvested Sep 17 and Oct 1. Fruit were inspected for tomato pinworm damage, external damage (primarily beet armyworm) and internal damage (primarily tomato fruit-worm). The 2 harvests were combined. At the last harvest all replicates were visually inspected for tomato russet mite damage. Data (Arcsin transformation) were analyzed by Duncan’s multiple range test at 5% probability level.

Experiments on Control of the Tomato Russet Mite in Southern California1

Journal Article Experiments on Control of the Tomato Russet Mite in Southern California Get access J. Wilcox, J. Wilcox Entomology Research Branch, Agr. Res. Serv., U.S.D.A. Search for other works by this author on: Oxford Academic PubMed Google Scholar A. F. Howland A. F. Howland Entomology Research Branch, Agr. Res. Serv., U.S.D.A. Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 49, Issue 6, 1 December 1956, Pages 768–771, https://doi.org/10.1093/jee/49.6.768 Published: 01 December 1956

The Tomato Russet Mite in the United States1

The Tomato Russet Mite in the United States1

Tomato Gall Mites from Morocco

Descriptions are given of the tomato erineum mite, Aceria lycopersici, and the tomato russet mite, Vasates lycopersici, in Morocco, from which country the latter species is recorded for the first time.A. cladophthirus is shown to be a synonym of A. lycopersici.These two mites are almost world-wide in distribution and probably occur in most countries where tomatos are grown, but A. lycopersici has not been recorded from Australia or New Zealand.

A Revision of the Gall-mites (Acarina, Eriophyidae) occurring on Tomato (Lycopersicum esculentum Mill.), with a Key to the Eriophyidae recorded from Solanaceous Plants

The records and descriptions of Eriophyid mites hitherto described from tomato are discussed. A statistical examination was made of morphological measurements of the New Zealand tomato russet mite. The names of gall-mites occurring on tomato have been reduced to two: Acerialycopersici (Wolffenstein) 1879, the tomato erineum mite (causing the production of white, hairy patches on stems and leaf stalks); and Vasates lycopersici (Massee) 1937, the tomatorusset mite (causing stem and leaf bronzing). A key is given to the species of gall-mites occurring on solanaceous plants and several new combinations are recorded.

Acaricides for Control of Tomato Russet Mite in California12

Journal Article Acaricides for Control of Tomato Russet Mite in California Get access T. O. Tuft, T. O. Tuft Andersonu, University of California Citrus Experiment Station, Riverside Search for other works by this author on: Oxford Academic PubMed Google Scholar L. D. Anderson L. D. Anderson Andersonu, University of California Citrus Experiment Station, Riverside Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 46, Issue 3, 1 June 1953, Pages 502–504, https://doi.org/10.1093/jee/46.3.502 Published: 01 June 1953