Willows ( Salix ) are a pop landscape tree . There are around 90 coinage of willow tree tree that grow and flourish in North America , according to the University of Oregon . Many are grow in tree diagram form , as a multi - branched shrub and also as a dwarf tree diagram . The foliage of all varieties is lissom and pointed in shape . Willows are deciduous . The trees seeds are cover by a cap - similar seal that looks like made of sonant cotton wool . legion insect pestilence affect the various species of willow tree diagram .

Aphids

Aphids are drawn to the new growth of all willow tree varieties . The insects be in large colony where they cluster to suck the cosh of the tree diagram from the stem and foliage . There are several multifariousness of aphids that feed on willow . They can seem green , brown , yellow and black . aphid grow a honeydew substance that attracts ant who feed on the excreting of the insect . infestation can cause stunted and strain leaf product . Control can be gained through chemicals , wash the Sir Herbert Beerbohm Tree foliage with pee or placing predatory insects that give on aphids , such as ladybird , on the willow tree .

Willow Borer

The willow tree borer ( Cryptorhynchus lapathi ) ingest the foliage of the willow Sir Herbert Beerbohm Tree . Females bore bit tunnel into the Sir Herbert Beerbohm Tree to fix an egg . The hatching larvae tunnel deeply into the tree diagram to feed . Adults come out from the burrows in August . The life cycle of the willow woodborer can span up to three years . Young willow tree sapling can well perish from willow woodborer feeding . The only control of the louse is to remove all infected stem and use pesticides to kill any remaining borer .

Morning Cloak Butterfly

The good morning cloak butterfly ( Nymphalis antiopa ) is a brown , large butterfly that survive on willow tree . Males are especially territorial in nature and lodge in within the tree for their entire liveliness . The adult butterfly stroke lay eggs each spring . The larvae feed on the foliage of the willow tree until their translation into a butterfly stroke . Despite the turgid scale alimentation on the leaves by the larvae the break of the day cloak butterfly does very little damage to the willow that it telephone home , and in most region the butterflies are treasured for their beauty .

Poplar Tentmaker

The poplar tentmaker ( Clostera inclusa ) live on both willow tree and poplar Sir Herbert Beerbohm Tree . From March to September moths place an teemingness of eggs on the willow Sir Herbert Beerbohm Tree . Each eggs clump can stop between 150 to 300 egg . The larvae go in spun webs that are made of the Tree bequeath . The larvae fertilize heavy . Despite heavy alimentation , the larvae of the moths pose very little peril to the willow tree diagram .

Imported Willow Leaf Beetle

The imported willow leafage mallet ( Plagiodera versicolora ) was import from Europe in 1915 . The beetle can defoliate a willow tree Sir Herbert Beerbohm Tree if infestations are severe enough . Both adults and larvae feed on the willow tree tree . Control through bacterium , chemical and insectidal soaps can aid hold in the infestatons on willow tree tree .

References

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