COCCUS VIRIDIS PDF

Green coffee scale, which has recently established in Western Australia, is considered to be an important pest of citrus and other fruit production. Green coffee. Coccus viridis was also reported as a pest in India at the end of the nineteenth century and has continued to cause problems for coffee growers, particularly in. Authors Ronald F. L. Mau, Extension Entomologist Jayma L. Martin Kessing, Educational Specialist Department of Entomology Honolulu.

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By using this site, you agree to the Terms of Use and Privacy Policy. The front end is rounded while the rear end has a distinctive groove. Hussey NW, Scopes N. In trials involving adding lady beetle larvae and lepidopteran larvae to plants infested with green scale with or without ants being present, it was found that the ants actively removed both kinds of larvae, usually within an hour of introduction.

Green scale appears in a rather definite pattern on citrus leaves. The host range includes vegetable, fruit and ornamental crops as well as many native plants [7].

Occurs in ccocus tropical regions of the world Merrill Australian Centre for International Agricultural Research, pp. Don’t need coccks entire report? Alpinia purpurata red ginger. This tropical soft scale may occur on cultivated hosts in commercial nurseries, resulting in a quarantine of the infested plants until the scale is under control.

Several entomogenous fungi were observed associated with green scale on citrus, and some apparently played an important role in the natural limitations of the scale on citrus during certain seasons of the year. Some preliminary investigations vviridis the green scale, Coccus viridis Greenin south Florida.

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Without the ants the green scale is more vulnerable to predation by beetles Mau and Kessing Green scale is transported to new areas on infected plants.

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Beitrage zur Entomologie, 26 2: The adult female is shiny pale green with a conspicuous black, irregular U-shaped internal marking that is dorsally visible to the naked eye.

Chemical control is possible indirectly by controlling ants by banding the tree stump. All plant material going into the greenhouse should be thoroughly inspected for scales and other insects before being introduced Copland and Ibrahim Kitts and Nevis, St. Photograph by University of Florida. Eggs hatch in anything between a few minutes and a viridls hours.

Coccus viridis (Green, 1889)

The Division of Plant Industry has recorded green scale on hosts in Florida since The nymphs are a flattish oval shape, yellowish green, with six short legs. Coccomorpha on ornamental plants in greenhouses from the central zone of the Morelos state, Mexico. First report of scale insects as pests of Kangra tea in Himachal Pradesh, India. Please consider upgrading your browser to the latest version or installing a new browser.

There are three nymphal stages before becoming an coccys, each stage being larger and more convex than the previous stage Mau and Kessing Sap sucking and excretion of honey-dew producing sooty moulds and attracting ants. Description Back to Top Adults: Click here for a Catalog.

green scale – Coccus viridis (Green)

Ants protect the green scales from lady beetles and other predators. Coccophagus, some Encyrtidae and Eulophidae. They usually remain in this same spot unless their position becomes unfavorable. Management Back to Top Chemical control: Once a suitable leaf or green shoot is found the nymphs settle and begin to feed.

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Kohler also mentioned two “races” one that is parthenogenetic and the vifidis that is sexual. Claw digitules equal; 3 pairs of prevulvar setae posterior pair often obscured by anal plates ; submarginal tubercles around body margin ; marginal setae slightly enlarged, strongly fimbriate; anal plates with posterior margin about equal in length to anterior margin ; each anal plate with 4 apical setaewithout a subdiscal seta ; with 2 subapical setae on each plate; anal fold with 4 fringe setae ; with tibio-tarsal sclerosis ; antennae 7-segmented; stigmatic setae differentiated from other marginal setae voridis, middle seta slightly longer than lateral setae ; multilocular pores normally with 7 loculi ; multiloculars usually present on all abdominal segments ; preopercular pores in small numbers, inconspicuous or absent.

Often they attack the young shoots, then one can usually see only a mass of scales Martorell Accumulations of sooty mold cause virkdis infested plant to be unsightly.

Distribution Table Top of page The distribution in this summary table is based on all the information available. Males have not been recorded for this species so the populations are composed entirely of females. This scale is susceptible to a number of pesticides including carbarylmalathionmethomyl and volck oil.

Close Find out more. Bohlen, ; EPPO, In turn, the ants feed on the sweet honeydew excreted by the scales.

The mature female does not move Mau and Kessing