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Integrated pest control in forest management combined use of pheromones and insecticides for attracting and killing the bark beetle ips typographus ii. effects of methamidophos treatment following bark penetration into the ascending sap of pheromone baited spruce



Integrated pest control in forest management combined use of pheromones and insecticides for attracting and killing the bark beetle ips typographus ii. effects of methamidophos treatment following bark penetration into the ascending sap of pheromone baited spruce



Forest Ecology and Management 26(1): 63-76



In 1985-1987, following bark treatment of Picea abies (Karst.) with an adhesive paste formulation (15% active ingredient of methamidophos), the effectiveness to Ips typographus (L.) was recorded from May until September. Groups of 4-6 trees were treated by scraping off a strip 20 cm wide of the dry bark about 1 m above the ground. The formulation CKB 1630 (proposed trade name: Ipidex) was spread on the fresh bark and the band closed by covering it with foil. Two trees in the centre of a group were baited by a pheromone dispenser 2 m above the ground, and in the control group the central 2 trees were baited only but not treated. A total of 15 experiments, each consisting of 3 experimental and 3 control groups, was performed at different heights and with 3 different categories of spruce damage caused by environmental pollution. The first assay was performed 4-6 weeks after application, the second at the end of August or early in September, depending on the actual temperatures observed. No significant differences between treated and untreated trees were found in the number of hole drilled by the beetles attracted, indicating no repellent activity of the formulation tested, but highly significant (P < 0.01) reduction of larvae, pupae and young beetles in the treated trees was recorded until September. The effective dosage was 1.0 g of methamidophos/cm of trunk diameter (16 mg/cm2 of treated bark surface). The number of beetles attracted and killed by the baited trees was greater by a factor of at least 3 than that attracted by traps. The treatment of trees after windfalls was also very effective.

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Accession: 007470945

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DOI: 10.1016/0378-1127(88)90102-8


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