Cooleys Fichte Gall Adelgid


Cooleys Fichte Gall Adelgid

Cooleys Fichte Gall Adelgid

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Die unreifen Weibchen überwintern auf Fichten. Das Weibchen reift im Frühjahr und legt Eier auf die Astspitzen. Die Eier schlüpfen und die Nymphen bewegen sich zu dem neuen Wachstum und ernähren sich an der Basis der Nadeln. Die Fütterung verursacht die Bildung einer Galle, die die Insekten umgibt. Im Hochsommer bildet sich an der Basis jeder Nadel auf der Galle eine Öffnung. Die Insekten verlassen die Galle durch diese Öffnungen und werden zu geflügelten Weibchen. Sie fliegen zu Douglasien oder Fichten und ernähren sich von diesen Bäumen, als wären sie wollige Blattläuse.

Das sichtbarste Symptom sind die an den Astspitzen gebildeten Gallen. Die Verzweigungsspitzen scheinen geschwollen und hängen zu sein. Sie werden manchmal als kleine "Kegel" beschrieben.

Verwenden Sie Diazinon, Sevin, Malathion, Orthene oder ruhendes Öl. Sprays müssen aufgetragen werden, bevor die Insekten in der Galle eingeschlossen sind.

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Cooleys Fichte Gall Adelgid - 46KCooleys Fichte Gall Adelgid - 57K
Cooleys Fichte Galle adelgid auf Fichte - 47KCooleys Fichte Galle Adelgid auf Douglas-Tanne - 65K
Cooley Fichte Galle adelgid, frühe Phase - 32K
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Cooleys Fichte Gall Adelgid

FAQ - 💬

❓ How do you treat Cooley spruce gall adelgid?

👉 Soil injections of imidacloprid can control Cooley spruce gall adelgids. However, the treatments often fail to kill many of the insects until after the galls are formed. These galls usually remain green rather than browning in early summer. Fall applications are recommended for this insect.

❓ How do you get rid of spruce gall adelgids?

👉 To control the adelgid, spray the tree(s) with Orthene or Tempo in late April or early May just after the buds break. A 2% summer oil spray can be used at this time but this is not as effective as Orthene or Tempo. If the problem persists, treat again in late August to September just after the galls open.

❓ What is the lifecycle of the eastern spruce gall adelgid?

👉 Life Cycle: These eggs hatch in about ten days and the immatures begin to feed on the new needles. This feeding stimulates gall formation, which surrounds the nymphs. New galls will almost appear to be normal green growth but only close inspection, at this time will reveal the abnormality.

❓ How do you treat galls on a tree?

👉 Prune and destroy gall-infested twigs and branches. Burn or step on the galls to kill the developing larvae. Place gall remains in a tightly sealed baggie or trash bag and discard immediately. Rake and destroy gall-infested fallen leaves.

❓ What is the best fungicide for needle cast?

👉 chlorothalonilNeedle cast diseases can be effectively controlled with fungicides containing chlorothalonil. For Rhizosphaera needle cast, two properly-timed applications per year for at least two consecutive years, and sometimes three years, is required for control.

❓ Do galls damage trees?

👉 In most cases, galls are unsightly but not damaging to the tree. Small plants may be stunted because the water and nutrient circulatory system of the plant may be damaged.

❓ How do you treat gall on trees?

👉 Prune and destroy gall-infested twigs and branches. Burn or step on the galls to kill the developing larvae. Place gall remains in a tightly sealed baggie or trash bag and discard immediately. Rake and destroy gall-infested fallen leaves.

❓ How long do spruce budworm outbreaks last?

👉 Quick facts. Outbreak cycles of spruce budworm occur every 30 to 40 years. During an outbreak, tens of millions of hectares of trees can be severely defoliated. An outbreak may last several years.

❓ How can galls be treated?

👉 The only useful method of treating soil for crown gall pathogen is with heat. The common soil fumigants reduce the amount of bacteria but do not result in satisfactory control of the disease. Steam (at 140°F for 30 minutes) or solarize (double-tent at 160°F for 30 minutes or 140°F for 1 hour) the soil.

❓ What kills needle cast?

👉 Chemical control:

  • The disease can be effectively controlled by applying fungicides containing chlorothalonil. ...
  • Two properly timed applications per year, for 2 to 3 consecutive years are often needed for control.

❓ When should you spray for needle cast?

👉 For best effectiveness, fungicides should be applied when the emerging needles are half elongated (1/2 to 2 inches in length). Needle cast diseases can be effectively controlled with fungicides containing chlorothalonil.

❓ What is the Cooley spruce gall adelgid?

👉 The Cooley spruce gall adelgid is a species of aphid that colonizes various spruces across Canada, but is most abundant in the west. In the Prairie Provinces its primary hosts are white, Engelmann, and blue spruces. Douglas-fir is an alternate host when growing in the same stands as spruce.

❓ What is a gall adelgid?

👉 The gall adelgid ( Adelges cooleyi) is an adelgid species that produces galls in spruce trees. They infect the new buds of native spruce trees in the foothills of the Rocky Mountains in the spring. They also attack blue spruce to a lesser degree.

❓ What is the host of This adelgid?

👉  This species of adelgid requires two hosts to complete their life cycle; spruce and Douglas-fir.  The galls it produces on spruce are formed by aphid - like insects.  Excessive numbers of these insects occur on cones, which may affect seed production. Host:  Spruce  Douglas-fir

❓ Does Douglas fir have gall adelgid?

👉 Douglas-fir is the alternate host of the Cooley spruce gall adelgid, although its presence is not essential for the buildup of large populations. Flocculence is also evident on Douglas-fir, along with a yellowing of foliage that can lead to premature needle drop, but there is no gall formation.


Autor Des Artikels: Alexander Schulz. Unabhängiger Konstrukteur und technischer Experte. Arbeitserfahrung in der Baubranche seit 1980. Fachkompetenz in den Richtungen: Bau, Architektur, Design, Hausbau.

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