
	Where results make sense

Topic: Leafhopper

	leafhopper - HighBeam Encyclopedia
		LEAFHOPPER [leafhopper] common name for small, wedge-shaped leaping insects, cosmopolitan in distribution, belonging to the family Cicadellidae, which comprises some 5,500 species of insects.
		Leafhoppers, and the family as a whole, attack a wide range of trees, shrubs, grasses, and forbs.
		As a result of the potato leafhopper's attack, the leaf's conducting tissue is plugged; the plant leaves curl and begin to turn brown near the tip, and eventually the whole leaf appears blighted.
	www.encyclopedia.com /doc/1E1-leafhopp.html (461 words)

	Xylella Fastidiosa Diseases and Their Leafhopper Vectors (Site not responding. Last check: 2007-11-06)
		Strains of this bacterium are the causal agent of phony peach disease (PPD), plum leaf scald, Pierce's disease (PD) of grapes, citrus variegated chlorosis (CVC), and leaf scorch of almond, coffee, elm, oak, oleander pear, and sycamore.
		Leafhoppers feed extensively on plum cultivars such as Santa Rosa and Metheley, cultivars that are highly susceptible to the bacterium.
		A leafhopper, Graphocephala sp., that vectors Xylella fastidiosa.
	edis.ifas.ufl.edu /IN174 (2792 words)

	Potato Leafhopper Damage and Resistance in Alfalfa \| Pioneer Hi-Bred Limited
		It is common for alfalfa producers to mistake leafhopper damage for moisture or heat stress, or boron deficiency, due to the characteristic yellowing symptom caused by leafhopper damage.
		Leafhoppers are sucking insects and also excrete a toxin while feeding on the sap from alfalfa plants.
		Leafhoppers migrate to other host plants when alfalfa is harvested and do not return until two or three weeks into the next growth cycle.
	www.pioneer.com /canada/crop_management/leafhopper-resistance.htm (1870 words)

	Potato Leafhopper
		Potato leafhopper is an important pest of alfalfa in Minnesota, and occurs throughout the United States east of the Rocky Mountains.
		Leafhoppers are hemimetabolous; the young are referred to as nymphs and closely resemble adults.
		The major differences between adult and immature potato leafhoppers are the absence of wings and the smaller size of the leafhopper nymphs.
	www.mda.state.mn.us /pestsurvey/factsheets/potatoleafhopper.htm (823 words)

	2002 Aster Leafhopper Survey (Site not responding. Last check: 2007-11-06)
		A survey was conducted from April 18-22 in the central states to determine the extent and orientation of aster leafhopper migration from its overwintering points of origin on winter grain in Louisiana, Arkansas, Oklahoma, Missouri, and Kansas.
		In addition to determining leafhopper numbers and location, adult leafhoppers are pooled from all locations on the survey and held on potted grain for use in a bioassay to determine the percentage of the migrating population carrying the aster yellows phytoplasma.
		Adult leafhoppers from the 2002 migration were pooled and placed individually on seedling asters on 4/29 to determine the 2002 infectivity level.
	ipcm.wisc.edu /news/pest/leafhoppersurvey.htm (849 words)

	White Apple Leafhopper and Potato Leafhopper
		In contrast to leafhopper spots, the spots caused by flyspeck are charcoal gray to fl in colour and they cannot be washed off (Figure 6).
		Leafhoppers have sucking mouth-parts to extract juice from leaves and therefore have the potential of being fireblight vectors.
		The importance of leafhoppers in the dispersal of this bacterial disease is unknown.
	www.omafra.gov.on.ca /english/crops/facts/whleaf.htm (1986 words)

	Potato Leafhopper (Site not responding. Last check: 2007-11-06)
		Leafhoppers migrate into North Carolina in early summer and become established on a wide range of plants throughout the growing season.
		While feeding, leafhoppers also inject a toxic substance into plants which, in most vegetable hosts, causes a condition known as "hopper-burn." This disease is characterized by a yellowing of the tissue at tips and margins of leaves which increases until the leaves die.
		Symptoms of leafhopper damage are sometimes confused with drought stress.
	ipm.ncsu.edu /AG295/html/potato_leafhopper.htm (428 words)

	White Apple Leafhopper, HYG-2202-92
		The white apple leafhopper overwinters in the egg stage under the thin bark of twigs that are approximately 1.25 cm (1/2 inch) in diameter.
		While white apple leafhopper is found on cluster leaves and not on actively growing terminal shoots, potato leafhopper is more of a threat to young, non-bearing fruit trees and young, tender foliage.
		White apple leafhopper can be distinguished from potato leafhopper by the tendency of white apple leafhopper to walk forward and backwards while potato leafhopper walks sideways as well as forwards and backwards.
	ohioline.osu.edu /hyg-fact/2000/2202.html (1365 words)

	Leafhopper FAQs
		Leafhoppers are insects belonging to the family Cicadellidae in the order Hemiptera.
		Leafhoppers are usually mounted dry on pins or point mounts.
		Leafhoppers may also be preserved indefinitely in 80-95% ethanol.
	www.inhs.uiuc.edu /~dietrich/lfhFAQ.html (1387 words)

	IPM : Field Crops : Clover Leaf Weevil (Hypera punctata)
		The potato leafhopper is an important insect pest of alfalfa, fruits, and vegetables.
		Potato leafhopper resistance or tolerance in alfalfa hybrids is based on the presence of glandular hairs on the leaf surface of the plant.
		Potato leafhoppers may be a threat to very young soybean plants or whenalfalfa fields are adjacent to the soybeans.
	www.ipm.uiuc.edu /fieldcrops/insects/potato_leafhopper/index.html (1469 words)

	Potato Leafhopper on Alfalfa - Penn State Entomology Department Fact Sheet
		The potato leafhopper is the most destructive insect to alfalfa in Pennsylvania, causing average annual losses of approximately $15 million.
		Potato leafhoppers are migratory insects that overwinter primarily in the states along the Gulf of Mexico, although some may overwinter in southern states along the Atlantic Ocean, because cold winters in the northern United States kill them.
		Four factors help determine whether an insecticide application for potato leafhopper control will be profitable: (1) the number of pests present in the field, (2) the development of the plants, (3) the value of the crop, and (4) the costs of the control application.
	www.ento.psu.edu /extension/factsheets/potatoLeafhopperAlfalfa.htm (2282 words)

	Insect & Disease Management \| Agronomy & Research Information \| Pioneer Hi-Bred International, Inc. (Site not responding. Last check: 2007-11-06)
		Because the alfalfa plants are young and exposed to leafhopper feeding pressure for a longer period of time than established stands, they often experience the greatest amount of damage.
		While yield reducing leafhopper infestations do not occur each year, the probability of experiencing heavy infestations at some time during the life of a stand is high.
		Leafhoppers are adapted to a wide variety of hosts and move between them readily.
	www.pioneer.com /usa/crop_management/national/leafhopper.htm (1542 words)

	Leafhoppers - Carrots, Lettuce, and Potatoes
		Leafhoppers are piercing and sucking insects that attack most leafy vegetables, carrots, and potatoes.
		The most common leafhopper is the aster leafhopper that transmits aster yellows disease to carrots and lettuce.
		The aster leafhopper may overwinter in grasses and small grain crop fields in northern Illinois but majority of them migrate in late spring from the southern states.
	www.urbanext.uiuc.edu /vegproblems/problems/d_leafhoppers.html (213 words)

	Leafhopper Homepage (Site not responding. Last check: 2007-11-06)
		Leafhoppers are one of the largest families of plant-feeding insects.
		Leafhoppers feed by sucking the sap of vascular plants, and are found almost anywhere such plants occur, from tropical rainforests, to arctic tundra.
		A summary of the diagnostic characters, known diversity and biogeography of the major groups of leafhoppers.
	www.inhs.uiuc.edu /~dietrich/Leafhome.html (163 words)

	Daylily Dictionary: Leafhopper (Site not responding. Last check: 2007-11-06)
		LEAFHOPPER - there are several different species of leafhopper in the family Cicadellidae, but none have been reported as significant pests of daylilies.
		Leafhoppers are usually less than a half inch in length and mostly cream, yellow, green or brown in color.
		Leafhoppers are important vectors of a number of serious plant diseases.
	www.daylilies.org /ahs_dictionary/leafhopper.html (198 words)

	Alfalfa IPM Potato leafhopper Cultural control
		Because of the nature of leafhopper damage to alfalfa (an internal blockage of the plant's vascular tissue) insecticide sprays are recommended only if the crop is LESS than 14 inches high.
		If the leafhopper level is above the action threshold and the crop is less than 14" tall, an insecticide treatment is recommended.
		The leafhopper is easily killed by insecticides, but alfalfa does not readily recover after the vascular tissue has been clogged.
	www.ento.vt.edu /VirginiaAlfalfaIPM/Alf_PLH/Alf_PLH_CultCont.html (177 words)

	Aster Leafhopper (Site not responding. Last check: 2007-11-06)
		Unless they are migrating northward in spring, the leafhoppers usually do not move more than 100 m (about 200 ft) over a 4-week period.
		Aster leafhoppers are the only known vector of this disease in the eastern U.S. Infected plants yellow, become stunted, branch excessively, and develop short internodes.
		Fortunately, the leafhoppers and the yellows disease they transmit are rarely much of a problem in North Carolina.
	ipm.ncsu.edu /AG295/html/aster_leafhopper.htm (431 words)

	Leafhopper - Wikipedia, the free encyclopedia
		Leafhoppers, also known as hoppers, are minute plant-feeding insects in the superfamily Cicadelloidea in the homopterous division of the order Hemiptera.
		Leafhoppers are found all over the world, and it is the second largest family in the Hemiptera; there are at least 20,000 described species.
		Leafhoppers are susceptible to various pathogens; viruses as in the(Dicistroviridae), bacteria, fungi, as well as having a host of parasitoids which attack the eggs.
	en.wikipedia.org /wiki/Leafhopper (265 words)

	White Apple Leafhopper
		Leafhopper damage to leaves has not been shown to affect fruit colour or size; however, high populations may affect newer apple varieties that are sensitive to stress.
		If very numerous, leafhoppers may be a nuisance to fruit thinners and pickers.
		White apple leafhoppers overwinter as eggs inserted in the bark of twigs, branches and water sprouts.
	www.agf.gov.bc.ca /cropprot/tfipm/leafhopper.htm (381 words)

	Welcome to Fields Crops IPM at Purdue University
		The potato leafhopper does not overwinter in the Midwest, but is carried annually northward from the Gulf Coast states by spring winds.
		Both potato leafhopper adults and nymphs feed on soybean, but the most serious damage is caused by the nymphs.
		This is because potato leafhopper arrival from the south coincides with early leaf tissue development of the late planted soybean.
	www.entm.purdue.edu /fieldcropsipm/insects/soybeanpotatoleafhopper.cfm (642 words)

	Aster Leafhopper
		There are many insects under the umbrella term of “leafhoppers” of which the two that are economically important to potato growers are the aster leafhopper (Macrosteles quadrillineatus) and the potato leafhopper (Empoasca fabae).
		Aster leafhopper (Macrosteles quadrillineatus) damages crops not only through direct feeding on the sap but also by being a carrier for a disease “aster yellows.” Aster yellows is caused by a mycoplasma-like organism (MLO) or phytoplasma.
		When as adult aster leafhopper first ingests the MLO, it takes 10 to 21 days for the MLO to replicate sufficiently to be able to be injected into potato plants.
	www.panhandle.unl.edu /potato/html/aster_leafhopper.htm (660 words)

	leafhopper - June 20, 1999
		Leafhoppers are currently being reported in potato, dry beans, alfalfa and even small grains.
		Leafhopper nymphs tend to feed on the underside of leaves and walk to the other side of the leaf when disturbed.
		Insecticides labeled for control of leafhoppers in dry beans include: Asana XL, Dimethoate EC (Cygon, De-Fend), endosulfan (Thiodan, Phaser), Lannate, Malathion 57 EC, Orthene 75S, and Penncap-M. In potatoes, treatment thresholds for populations of nymphs are 1 nymph per 10 leaves.
	nwroc.umn.edu /ent/archives/June20.html (1392 words)

	Leafhopper - Pest & Insect Problem Solver Guide
		Leafhoppers are one of the most abundant groups of plant feeding insects.
		Leafhoppers are wedge shaped and green or brown in color.
		Leafhoppers feed by sucking the sap from host plants.
	store.arbico-organics.com /leafhopper.html (95 words)

	Scout now for potato leafhopper in alfalfa (Site not responding. Last check: 2007-11-06)
		Potato leafhopper populations ranged from 0.7 per sweep in Campbell County to 3.7 per sweep in Orange County.
		Potato leafhopper damage to alfalfa may be severe, especially to fields that are just now being harvested.
		Procedures for monitoring potato leafhopper and recommended insecticides for controlling this insect are described on pages 128-130 of the 2001 Virginia Pest Management Guide for Field Crops-Extension Publication no. 456-016 (or go to http://www.ext.vt.edu/pubs/pmg/fc4a.pdf to download a PDF file of the Field Crops Insects section from the Pest Management Guide-then scroll down to page 128).
	www.ext.vt.edu /news/periodicals/cses/2001-06/potatoleafhopper.html (317 words)

	White Apple Leafhopper
		At times, the potato leafhopper can be mistaken for the nymphs and adults of the white apple leafhopper.
		The first-generation or overwintering eggs are laid beneath the bark of the apple twigs in the cortex.
		The second generation is responsible for spotting and streaking on the fruit caused by accumulation of leafhopper excrement.
	web1.msue.msu.edu /vanburen/walh.htm (801 words)

	Potato Leafhopper
		Among entomologists, the leafhopper ranks third as the most important insect pest in North America, after the Colorado potato beetle and green peach aphid.
		Potato leafhopper, primarily adults, cause feeding injury to potato plants.
		Hosts for potato leafhopper besides potato include edible beans especially lima and snap, alfalfa, and soybeans which is not seriously affected.
	www.panhandle.unl.edu /potato/html/potato_leafhopper.htm (644 words)

	The Grape Leafhopper - Erythroneura comes - Colorado State University Cooperative Extension Tri River Area
		The white flecking seen on these grape leaves is the result of the grape leafhoppers puncturing the cells on the underside of the leaves and sucking out the sap.
		Berries on leafhopper damaged plants also have a lower sugar and increased acid content thereby affecting the quality of the wine produced from these grapes.
		Controlling leafhopper populations on these and other plants, to include weeds near the vineyard will help reduce leafhopper damage on grapes.
	www.colostate.edu /Depts/CoopExt/TRA/PLANTS/gpleaf.html (396 words)

	WDNR - Red-Tailed Leafhopper
		The leafhoppers have been found to survive on burned sites in very low numbers and recovery is largely by migration from unburned areas.
		As a flightless insect, the leafhopper travels slowly from unburned areas and such refugia must include enough prairie dropseed to sustain the population.
		Mowing seems to have little effect on leafhopper populations and can be useful to remove woody plants encroaching on the prairie but does not remove the thatch buildup that eventually reduces prairie dropseed.
	www.dnr.state.wi.us /org/land/er/invertebrates/leafhoppers/redtailed.htm (244 words)

	White apple leafhopper/Rose leafhopper
		Second generation leafhoppers are present from early August through the fall.
		Management: To prevent economic impact from leafhopper feeding, an average of three nymphs per leaf is recommended as an action threshold for insecticide application.
		The action threshold should be lowered to one nymph per leaf where the nuisance to pickers from adult leafhoppers is a concern during harvest.
	www.caf.wvu.edu /kearneysville/pest_month/insectfocusaugust98.htm (801 words)

	Leafhopper
		Description: Leafhopper adults are elongated, wedge shaped and somewhat triangular in cross-section.
		Depending on species, they range in size from 1/8 to 1/2-inch and their bodies are colored yellow, green, gray or they may be marked with color patterns.
		The rose leafhopper, Edwardsiana rosae (Linnaeus), feeds primarily on plants of the rose family, although foliage of other woody plants (flberry, Cornus, oak, Prunus, Populus, raspberry, Ulmus, Acer and others) serve as food.
	insects.tamu.edu /fieldguide/aimg88.html (459 words)

Try your search on: Qwika (all wikis)