Green Peach Aphid – Myzodes persicae

Myzodes persicae

Myzodes persicae

Distribution:

The species is found in Europe, Asia, North America, Africa and Australia. In Europe, it is often found in all regions, attacking a large number of woody and herbaceous plants, in the field, greenhouses and hotbeds.

Description

The wingless forms have oval, slightly globulous body, 1.4-2mm long, light or dark green colored. The winged ones have black head and thorax, greenish-yellow body, with side sports and stripes which join in the middle in a big black spot. 

Myzodes persicae - adult

Biology and ecology: 

It is a migrant species which overwinters as a resistance egg. The winter eggs laid on the peach tree hatch starting with the first or second decade of March. In a viviparous manner, the fundatrix will form several generations of fundatrigenes over the course of 3-4 weeks. The last generation of alate females migrates on different species of herbaceous, cultivated and spontaneous plants, where they propagate in a viviparous parthenogenetic manner, forming several generations of alate and wingless females.   In autumn, starting with the third decade of September, up until November, sexuate females are formed, which, after copulation, lay the winter egg.

Myzodes persicae - adult 1

Affected Plants and Damage:

It is a polyphagous species, it attacks over 240 species of plants, with a great preference for the peach tree, apricot tree, tomatoes, egg-plant, pepper, potato, tobacco, lettuce, grey-pea, bean, spinach etc. The aphid forms colonies on the lower surface of the leaves, which it pricks, sucking the sap. Because of the attack, the tissues undergo necrosis, the leaves turn yellow and wither. Besides the direct damage, this aphid also transmit different viruses, which cause mosaic in some plants (potato, tomato). 

Myzodes persicae - affected plant

Myzodes persicae - affected plant 1

Prevention and control

The winter treatments for the prevention of European fruit lecanium destroy resistance eggs and decrease the population reserve. In order to prevent this pest, the chemical treatment will be done in spring, a few days after the appearance of the first colonies on the leaves, and will be repeated at each generation, if needed. The approved treatments are Actara (0.1 kg/ha), Decis Mega (0.15 l/ha), Fastac 10 EC (0.004%), Faster 10 CE (0.03%), Karate Zeon (0.2 l/ha), Mavrik 2 F (0.5 l/ha).

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