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Strict regulations limiting the availability of synthetic pesticides on vegetable crops in greenhouses have created a new challenge for plant protection. Many pests such as whiteflies, thrips aphids, spider mites, and other, still remain dangerous and difficult to control on vegetable crops in greenhouses. In the experience of many and in a review of world literature, it has been noted that effective...
The codling moth (CM), Cydia pomonella (L.), causes heavy damage in Bulgarian apple orchards. Conventionally treated orchards, were monitored in this study. In spite of numerous chemical treatments, these orchards showed increasing flight densities of CM moths, growing populations of hibernating larvae and rising fruit damage rates. Thus, the control of CM by conventional spraying programmes became...
Endopeptidase marker EpD1b and STS marker XustSSR2001-7DL are closely linked to very effective eyespot resistance gene Pch1. Because of this, the aim of this study was to compare the results obtained under lab conditions using such markers with the results obtained under field conditions. 134 wheat breeding lines and Triticum aestivum L. var. Randevous used as a eyespot resistance control were analized...
Modern consulting and the automatic Decision Support Systems (DSS) need reliable measurements of the agrometeorological elements in a digital and on-line form. For this purpose, properly equipped and correctly spaced agrometeorological station networks are necessary. When building the networks the existing meteorological infrastructure should be taken into consideration. For this to be possible, a...
The effect of a soil application of salicylic acid (SA) and a biocontrol agent, Trichoderma harzianum (TH) on the induction of phenolic accumulation content and defense enzymes in tomato plants infected with Fusarium oxysporum f. sp. lycopersici (F. oxysporum) was investigated. The phenolic content was recorded to be higher in all the treatments viz. F. oxysporum, F. oxysporum + TH, F. oxysporum +...
282 Potato virus Y (PVY) isolates collected from potato crops in northern and central Poland from 1995 to 2009 were characterized by serological and biological assays. From these, 112 isolates collected from 2006 to 2009 were additionally analyzed by one-step triplex Reverse Transcription-Polymeraze Chain Reaction (RT-PCR). Recombinants of PVY strains predominate among the isolates tested. Using one-step...
Water extracts from allelopathic crops possess the potential to control weeds effectively, especially when used in combination with reduced rates of herbicides. Label doses of different herbicides and their seventy percent reduced doses, were combined with 18 l/ha each of allelopathic sorghum and sunflower water extracts (WE). This combination was sprayed 30 days after sowing (DAS) for weed control...
Root-knot nematodes (Meloidogyne spp.) are one of the three most economically damaging genera of plant parasitic nematodes on horticultural and field crops. Root-knot nematodes are distributed worldwide, and are obligate parasites of the roots of thousands of plant species. All major field crops, vegetable crops, turf, ornamentals, legumes and weeds are susceptible to one or more of the root-knot...
The studies were conducted in an urban greenery area of Poznań, Poland to compare the effectiveness of Moericke colour traps and light traps used to catch aphids. The combined methods yielded 61 aphid species from the area. The light trap caught 51 species, while 44 species were caught using the Moericke trap. Over 4,000 specimens were collected with each method separately.
The paper provides a review of the studies focusing on the impact of plant trimming and pruning (especially in tree rows) and tree crown formation (in orchards and urban greenery) on the bionomy and number of aphids and some other hemipterans. The fresh, succulent shoots which appear after any trimming and pruning provide aphids with "eternal spring" conditions, i.e. the availability of...
Mycotoxins have a proven toxic effect on the health of humans and animals. Nowadays, there is a focus on having a healthy lifestyle and consuming organic foods. High quality grain products, especially spelt products, which are an important element of a well-balanced diet have become more popular. The aim of this study was to determine the mycotoxin content in spelt products available on the Polish...
In the years 2009 and 2010, in the apiaries surrounding Tarnobrzeg and Leżajsk, Poland (close to the Carpathian Mountains) research was carried out on diurnal changes in the sensitivity of young honey bee (Apis mellifera) workers to insecticides from various chemical groups: pyrethroids (esfenvalerate, cyhalothrin, alpha-cypermethrin, beta-cyfluthrin, deltamethrin), derivatives of pyridine (pyriproxyfen),...
The study aimed to evaluate the performance of air assistance in spray booms using different types of nozzles and spray volumes. We took into account spray deposits, fall armyworm control and crop corn performance in a narrow row cropping system. The experiment was carried out at the experimental area of Sao Paulo State University, Botucatu/SP, Brazil, during the 2008/2009 agricultural season, in...
During the 2008-2009 time period, the effect of phacelia grown with broad bean on the presence of Syrphidae in colonies of Aphis fabae Scop. as well as the attractiveness of phacelia flowers for syrphid adults was researched. In A. fabae colonies, 9 Syrphidae species were collected. On plots with phacelia, less aphids and more syrphid larvae, compared to the homogenous crop, were observed. The dominant...
Pseudomonas syringae pv. syringae is a plant pathogen bacterium in rice which causes bacterial sheath rot. In this study, simplified AFLP (Amplified fragment length polymorphism) was tested in order to evaluate genetic diversity of 38 Pseudomonas syringae pv. syringae strains isolated from rice fields of the Guilan province, by 12 AFLP primers. The products resulted from AFLP were separated using...
Severe root and stem base rot was noticed for the first time on Sciadopitys verticillata in 3 hardy ornamental nursery stocks. Phytophthora citrophthora was isolated from about 4/5 of the analysed plants. In the laboratory trials this species caused stem and root rot. On stem parts and needles inoculated by isolates from the host plant and Pinus sylvestris, necrosis was observed to have spread at...
Essential oil of Artemisia annua L. was investigated to find out its toxicity and physiological aspects on the slug Agriolimax agrestis, in controlled conditions (8±1°C, 75±5 RH and 14:10 LD). The slugs received different concentrations of essential oil treated radish leaves in methanol, while the control received methanol alone. LC10, LC30, LC50 and LC90 values were estimated at 4.67, 5.3, 5.81,...
The degradation and biological effectiveness of five insecticides, ES-Fenvalerate (Soumi Gold), pirimicarb (Afox), imidacloprid (Emax), buprofenzin (Ablloud) and methomyl (Methiolate) in their aqueous preparations and emulsifiable concentrates, on immature stages of whitefly insect Bemisia tabaci. when exposed to UV-light, two different temperatures and daylight and dark storage after exposure intervals...
The logistic model is commonly used for analysis of discrete, multinomial data. Such a model was used for the statistical evaluation of data concerning infection of field pea varieties by downy mildew, in two series of field trials. Each series consisted of experiments performed in locations spread over the whole of Poland in the time period from 2002 to 2005. Varieties cultivated on light soils were...
Throughout the year, there was an abundance of fruit flies in Cue-lure baited traps. Two peaks; in summer and kharif (Autumn) coincided with the 14 SW and 43 SW respectively. In kharif, maximum bitter gourd fruit damage (62.70%) occurred in the 45 SW. A second peak, with 49.70% fruit damage was observed during the 15 SW period. The temperature (maximum and minimum) showed a significant positive correlation...
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