Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 2

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
In the present study we investigated the leaching behaviour of hexaconazole fungicide in two soil packed columns, namely disturbed and undisturbed soil columns in field conditions. The effects of simulated rainfall (100 mL, 200 mL, and 400 mL) and application rate at recommended dosage (4.5 g a.i/palm tree) and double recommended dosage (9.0 g a.i/palm tree) were also studied. The residual of hexaconazole in the soil column was observed to be significantly different between the volumes of simulated rainfall application and decreased with increased soil depth. The highest concentrations were detected at the soil surface (0-10 cm), where 53-63% of the hexaconazole remained after applications. No significant difference was found between the disturbed and undisturbed soil packed column when treated with the recommended and double recommended dosages of hexaconazole. In order to understand the hexaconazole leaching pattern, a field study experiment with the same soil properties and application rate was conducted. The results showed that hexaconazole was distributed downward through the preferential flow and soil crack in the sandy loam soil profile. The groundwater ubiquity scores (GUS) Index for hexaconazole calculated in Malaysian soil was 4.61, indicating that hexaconazole has a high risk of contaminating groundwater resources.
The first record of Ganoderma can be traced back to the Pharmacopoeia written by Chinese scientists in first century B.C. Several Ganoderma species are known as ‘‘white rot’’ fungi, which cause the display of the white cellulose on wood by degrading the lignin component. Ganoderma boninense is the main agent of basal stem rot (BSR) disease, as a persistent problem in the oil palm (Elaeis guineensis, Jacq.) cultivation that needs to be controlled. Oil palm, which is the main host of this pathogen, is an economically important crop grown in Southeast Asia, Africa, and America. Due to the negative effects of Ganoderma on the plants, especially on oil palm, this review focuses on the mechanisms of Ganoderma infection and its control, the importance of lignin and silicon (Si) to plant defense. This review also explores different methods for Ganoderma control and techniques for producing less susceptible oil palm. Genetic manipulation of oil palm for enhancing resistance to Ganoderma is also discussed.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.