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Prostorové rozmístění škůdců v porostu máku setého v okolí Rozseče
Špička, František
The occurrence of the opium poppy pests was observed in the Bohemian-Moravian highland around the village Rozseč in the years 2012 on two study areas, in the year 2014 on four study areas. There was discovered occurrence of three pests. The occur-rence of poppy root weevil exceeded threshold on all study areas. In the year 2012 one plant had occurrence on an average of 4.32--5.82 larvae. 3.15--5.18 adults on meter of line were registered, maximal amount was nine adults in the year 2014. The infestation intensity of plants was 29--61 %. 1.3--2.56 larvae on one plant were discovered, maxi-mum seven larvae. The root weevil occurred evenly on all area of all study areas. Weevil poppy was discovered on study area with lowest height above sea level (604 m) with west inclination only in the year 2014. Adults were registered on five poppy head. The occurrence of weevil poppy obviously was not disintegrating on all area. The black bean aphid occurred in the middle intensity in the year 2012. 4--11% infestation of plants was discovered after leaving overflight from the winter hosts in the year 2014. 17--41% infestation of plants was discovered before blossom. The irregular dispersion of the black bean aphid on a few lands could have been caused by wind.
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Prostorové rozmístění škůdců v porostu máku setého v okolí Rozseče
Špička, František
The occurrence of the opium poppy pests was observed in the Bohemian-Moravian highland around the village Rozseč in the years 2012 on two study areas, in the year 2014 on four study areas. There was discovered occurrence of three pests. The occur-rence of poppy root weevil exceeded threshold on all study areas. In the year 2012 one plant had occurrence on an average of 4.32--5.82 larvae. 3.15--5.18 adults on meter of line were registered, maximal amount was nine adults in the year 2014. The infestation intensity of plants was 29--61 %. 1.3--2.56 larvae on one plant were discovered, maxi-mum seven larvae. The root weevil occurred evenly on all area of all study areas. Weevil poppy was discovered on study area with lowest height above sea level (604 m) with west inclination only in the year 2014. Adults were registered on five poppy head. The occurrence of weevil poppy obviously was not disintegrating on all area. The black bean aphid occurred in the middle intensity in the year 2012. 4--11% infestation of plants was discovered after leaving overflight from the winter hosts in the year 2014. 17--41% infestation of plants was discovered before blossom. The irregular dispersion of the black bean aphid on a few lands could have been caused by wind.
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