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 ...

BACKGROUND Homeopathic potencies are used as specific remedies in complementary medicine. Since the mode of action is unknown, the presumed specificity is discussed controversially. OBJECTIVE This study investigated the effects of potentised substances on two yeast species, Saccharomyces cerevisiae and Schizosaccharomyces pombe, in a stable and reliable test system with systematic negative co...

Cercospora leaf blight and purple seed stain are caused by kikuchii other spp. The fungus can infect leaves seeds on soybean, the disease is controlled with fungicides. In Brazil, intensive use of fungicides soybean to control diseases such as rust has exerted resistance selection pressure all fungal pathogens that attack in crop. this study, we evaluated sensitivity 56 isolates collected durin...

A novel and efficient organic waste management strategy currently gaining great attention is fly larvae composting. High resource recovery efficiency can be achieved in this closed-looped system, but pharmaceuticals and pesticides in waste could potentially accumulate in every loop of the treatment system and spread to the environment. This study evaluated the fate of three pharmaceuticals (car...

Pesticide sorption in soils is controlled by time-dependent processes such as diffusion into soil aggregates and microscopic sorbent particles. This study examines the rate-controlling step for time-dependent sorption in clay loam aggregates. Aggregates (5 mm) were stabilized with alginate, and adsorption of azoxystrobin, chlorotoluron, and cyanazine was measured in batch systems equilibrated f...

Pathogen exposure to sublethal doses of fungicides may result in mutations that may represent an important and largely overlooked mechanism of introducing new genetic variation into strictly clonal populations, including acquisition of fungicide resistance. We tested this hypothesis using the clonal plant pathogen, Sclerotinia sclerotiorum. Nine susceptible isolates were exposed independently t...

This study investigated the sensitivity of 92 isolates Passalora fulva from tomato plants in Wakayama Prefecture to thiophanate-methyl, penthiopyrad, boscalid, azoxystrobin, and triflumizole using agar dilution methods. All exhibited reduced more than two fungicides. Bioassays seedlings showed that mancozeb WP (wettable powder), TPN WP, iminoctadin-albesilate were effective against strains resi...

An autumn-winter trial was carried out in Southern Italy open-field conditions on butterhead lettuce to investigate the effect of nitrogen (N) fertilizer rate (0, 50, and 100 kg ha−1, N0, N50, N100) application azoxystrobin, sprayed twice an earlier vs. a later scheme, specifically at 65/85 or 65/100 days after transplantation. untreated control also included. The evaluation product quality con...

Turf managers often rely on fungicides to limit damage caused by root diseases. Because fungicides are applied to aboveground surfaces and do not move basipetally, they are effective against root pathogens only when fungitoxic concentrations migrate to the rhizosphere. This research focused on the distribution of modern fungicides in verdure, thatch, sand, and roots of creeping bentgrass [ L. v...