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Oriental Fruit Moth

Date:2017-09-09 16:58

Host

Pear, peach, nectarine, apple, plum, cherry, hawthorn.

 

Distribution

OFM is a world-wide pest which widely distributed in Asia, Europe, America and Oceania. In China, OFM occurs widely from the northern to southern fruit production areas. It is especially severe in orchards of northern and north-western China where pear and peach are grown side by side.

 

Damage

Larvae damage developing shoots of peach, nectarine, plum and cherry trees. In pears, they are capable of developing in undeveloped buds. One larva can damage 1-4 shoots, then transfer to fruits. Larvae tunnel from petiole base and move forward to xylem. As a result, new shoots wither and show typical flagging symptoms. Larvae often enter fruit at the stem base. The burrow in the fruit is small and black. Later, the fruit surface shows frass and/or gum. Under high humidity conditions, fruit skin around the hole becomes black and flesh becomes rotten. OFM not only decrease yield but also destroys vegetative growth of young trees.

OFM causes more damage in orchards where pear and peach are grown together. Late varieties receives more damage than early varieties. Upper canopy receives more damage than lower canopy.

 

 

Life cycle

OFM has 3-7 generations per year. In northern China is 3-5 generations and 6-7 generations in the southern part over Yangtze River. In northern China, overwintering larvae pupate from early April. Late April shows the peak emergence of overwintering adults. The first generation emerges at May, and the second generation emerges between June to July. Last generation shows up at early September, then the population decreases from mid-September. The emergence of first and second generations are clear, but shows the overlapping of following generations. The first and second generations mainly damage new shoots especially of peaches, and the third to forth generations damage fruits. In spring, larvae could pupate when average temperature reaches 8℃, while temperature over 32℃ could affect normal growth. OFM prefer higher humidity (over 70%).

 

Description

Adult: Grey to brown moth about 4.6-6.0mm long, with a wing span of 10.6~15.0mmlong. Margin of forewings has a group of white lines, and the center has a white spot. Anal comb is showed at the end of body.

Egg: Flatted oval white-yellowish egg, about 0.5mm long. In the middle is convex but the edge is flatted. Eggs turn dark when they are going to hatch.

Larva: Immature larvae are white, head and protergum are brown. Mature larvae are yellowish to pinkish of 10-12mm in length, protergum is light yellow.

 

Pupae: Spindle-shaped yellow to brown pupae about 6-7mm long. Eyes are black. The back of 3rd to 7th abdominal segments has two lines of setae. Pupae are covered by a grayish-white silk cocoon.

 

Similar pest: Codling moth and Carposina sasakii

Solution: Oriental fruit moth mating disruption paste formulation

Information from Chinese academic papers.

TypeInfo: Fact sheet

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