Sun Fly - Hoverfly - Randasveifa - Sveiffluga - Agúrkublóm - Garðyrkja - Flugur - Skordýr
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Cucumber - Cucumis sativus 'Femspot' and a Sun Fly - Helophilus pendulus - Kjarrsveifa - Blómasveifa eða Randasveifa að frjóvga agúrkublóm í gróðurhúsinu mínu. Þetta er kvenfluga því þær hafa bil milli augnanna sem karlarnir hafa ekki.
Randasveifa er algengust í blómlendi við lífríkar tjarnir og díki, í gróðurríkum skurðum með kyrrstæðu vatni og miklu groti. Hún laðast einnig að garðtjörnum með rotnandi laufum og pollum við fjóshauga. Flugurnar sækja í blóm. Lirfurnar alast upp í vatni og nærast á rotnandi plöntuleifum. Randasveifur sjást frá vori til hausts, byrjun maí og fram í október, en mest ber á þeim yfir sumarmánuðina þegar sólar nýtur við. Randasveifa er einkar falleg með gulu og svörtu litmynstri sínu, langröndóttum frambol og flekkóttum afturbol. Af þeim sökum er hún stundum mistekin fyrir geitung, þó litmynstrið sjálft sé fjarri því að vera líkt á þessum fjarskyldu skordýrum. : http://www.ni.is/poddur/nattura/poddur/nr/1007
A very common medium sized hoverfly, about 13mm long. Adults feed on nectar throughout the year. One of several species of related hoverfly whose larvae are known as rat-tailed maggots, living in muddy water. See more: http://www.wildlifewatch.org.uk/explore-wildlife/animals/minibeasts/hoverfly-helophilus-pendulus
Like other members of the genus Helophilus it has black and yellow longitudinal stripes on the upper surface of its thorax. The abdomen is patterned with yellow, black and grey, and for this reason it is sometimes called the footballer. It has a black central face-stripe. It has a wing-length of 8.5 - 11.25 mm. It is associated with a wide variety of waterbodies, from large lakes and rivers down to areas as small as ditches, small ponds or even muddy puddles. Larvae have even been found in cow-dung, very wet manure or very wet old sawdust.
This species visits flowers; it also commonly rests on leaves. It often emits a buzzing sound when resting. It is a notable wanderer and can be found well away from water. The larvae feed on detritus. See more: https://en.wikipedia.org/wiki/Helophilus_pendulus
This hoverfly is sometimes called 'The Footballer' due to its stripy thorax. There are in fact several species with similar stripes which are difficult to tell apart. Another name is 'The Sunfly' due to its preference for bright sunny days. See more: http://www.naturespot.org.uk/species/footballer
Hoverflies, sometimes called flower flies or syrphid flies, make up the insect family Syrphidae. As their common name suggests, they are often seen hovering or nectaring at flowers; the adults of many species feed mainly on nectar and pollen, while the larvae (maggots) eat a wide range of foods. In some species, the larvae are saprotrophs, eating decaying plant and animal matter in the soil or in ponds and streams. In other species, the larvae are insectivores and prey on aphids, thrips, and other plant-sucking insects. Aphids alone cause tens of millions of dollars of damage to crops worldwide every year; because of this, aphid-eating hoverflies are being recognized as important natural enemies of pests, and potential agents for use in biological control. Some adult syrphid flies are important pollinators. See more: https://en.wikipedia.org/wiki/Hoverfly
Transfer young plants to 25cm (10in) pots of good potting compost in late March (heated greenhouse), late May (unheated greenhouse). Keep the compost evenly moist – little and often is the best way. You can also use growing-bags but plants will need to be carefully watered and looked after. Train the main stem up a vertical wire or cane. Pinch out the growing point when it reaches the roof. Pinch out the tips of sideshoots two leaves beyond a female flower (recognisable by tiny fruits behind flower). Pinch out the tips of flowerless sideshoots once they reach 60cm (2ft) long. Keep the humidity high by watering the floor and, once planted out, feed every 10-14 days with a balanced liquid fertiliser. See more: https://www.rhs.org.uk/advice/grow-your-own/vegetables/cucumbers
Cucumber (Cucumis sativus) is a widely cultivated plant in the gourd family, Cucurbitaceae. It is a creeping vine that bears cylindrical fruits that are used as culinary vegetables. There are three main varieties of cucumber: slicing, pickling, and burpless. Within these varieties, several different cultivars have emerged. The cucumber is originally from Southern Asia, but now grows on most continents. Many different varieties are traded on the global market. See more: https://en.wikipedia.org/wiki/Cucumber