The application as soil drenches of three commercial products containing metalaxyl, phosphorous acid or potassium silicate, were studied a means controlling Phytophthora in chestnut (Castanea sativa Mill.) seedlings. In the metalaxyl treatment no plant deaths recorded, whereas with and silicate applications, untreated control, mortality rate was respectively 33.3, 44.4 77.8%. presence detected ...

The objective of this study was to evaluate the toxicity of some pesticides used in chrysanthemum crops to eggs and nymphs of Orius insidiosus (Say). The bioassays were carried out at 25 ± 2oC, 70 ± 10% RH and 12h photophase. For the tests with eggs, stems of Bidens pilosa L. previously exposed to predator oviposition were dipped for five seconds in aqueous dilution of the pesticides, using 40 ...

Phytophthora is a microbial genus that includes species causing many diseases (Erwin and Ribeiro, 1996). These species infect and kill nearly all species of deciduous fruit trees. Phytophthora crown and root rots, which are caused mainly by P. cactorum, P. megasperma, P. citrophthora, P. cinnamomi, P. cambivora, P. syringae and P. cryptogea (Sarejanni, 1935; Kouyeas, 1971; Kouyeas, 1977; Flores...

Abstract In Bangladesh, the third largest producer of potatoes in Asia, late blight, caused by Phytophthora infestans , is major constraint to production. Nevertheless, there a lack published information on pathogen population. A collection 69 isolates obtained from samples infected potato foliage collected 2018–2019 varied significantly their aggressiveness detached leaflets and tuber slices c...