Grape berry moth, Lobesia botrana Den. & Schiff. is one of the most important pests of grape vine in most parts of the country. Losses caused by larval feeding leads to disrupted plant activities, reduction in flower buds and ultimately decreased quality and quantity of the crop. In order to study seasonal flight activity of Lobesia botrana and to determine spraying time, experiments were conducted for two consecutive years at two different orchards in Sissakht region in 1999-2000. The seasonal flight of Lobesia botrana was investigated by using pheromone traps and collecting samples from eggs, larva and pupa stages of the pest. The results showed that Lobesia botrana has three generations with an incomplete 4th in the region. Damage of first and forth generation is very low. The grape vine fruits can be mainly damaged by the second and third generation of Lobesia botrana that will happen about ten days after the adult emergency. Regarding to the results, spraying should be done during two weeks from 9th Lobesia botrana for the next year.
Key Words: Lobesia botrana, Population dynamics, Pheromone traps, spraying.
Introduction
Grape is one of the major economical products in Iran. Kohkiluyeh-Va-Boyer- Ahmad has been long one of the Vineyard provinces of Iran. According to statistics of 2005, there was 1900 hectares under cultivation (700 hectares of sapling and 1200 hectares of fruitful trees) with the production of 1250 metric ton, an average of 12500 Kg per hectare [5, 7]. The vineyards of Kohkiluyeh-Va-Buyer-Ahmad are mostly in the counties of Buyer-Ahmad, Sissakht (Dena) and Kohkiluyeh [10].
Lobesia botrana is one of the most important pest causing serious damages to vineyards in Iran and around the world. In some years, ...
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... – 11, May 13 – 18, May
End of 2nd gen 26, May – 5, June 25, May – 4, June
Start of 2nd gen. 5 – 12, June 4 – 11, June
Fly climax of 2nd gen. 19 – 26, June 18 – 25, June
End of 2nd gen 17 – 31, July 13 – 28, July
Start of 3rd gen. 31, July – 11, August 28, July – 13, August
Fly climax of 3rd gen. 20 – 27, August 22 – 29, August
End of 3rd gen 3 – 9, September 6 – 16, September
Start of 4th gen. 9 – 16 September 16 – 24, September
Figure 1. Population dynamics vine moth in Sissakhat region (plain) 2007-2008
Figure2. Population dynamics vine moth in Sissakhat region (Mountain). 2007-2008
Figure 3a. Fluctuation curve daily Min and Max temperature (Celsius). 2007
Figure 3b. Fluctuation curve daily Min and Max temperature (Celsius). 2008
Figure 4. Exit trend adults overwintering in laboratory conditions (2008).
References :
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