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Reflectance spectroscopy and machine learning as a tool for the categorization of twin species based on the example of the Diachrysia genus
Occurrence of Damage and Diseases in Early Maize (Zea mays L.) Varieties Depending on Sowing Date and Climatic Conditions
To cope with the increasing pressure from diseases and pests under climate change, the effect of 6 maize sowing dates on the plant health of an ultra-early maize variety (Pyroxenia, FAO 130) was analyzed in studies conducted from 2016 to 2018. The assessment of the response of the ultra-early variety to climate change will contribute to the identification of its predisposition to cultivation in terms of health recognition. The extent of plant damage caused by the frit fly (Oscinella frit L.), the European corn borer (Ostrinia nubilalis Hbn.), and the cereal leaf beetle (Oulema melanopus L.), as well as the severity of plant infection by Fusarium ear rot (Fusarium spp.) and maize smut (Ustilago maydis (D.C.) Corda), was assessed. Air temperature, precipitation, and the length of the growing period at individual sowing dates were also analyzed. The lowest level of insect damage and the highest level of disease infection were recorded in the final year of the study (2018), which was dry and had higher mean air temperature. Precipitation and temperature during the sowing dates ranged between 110.5 and 146.1 mm and 17.5 and 19.9 °C, respectively. The optimal sowing date for reducing maize losses caused by insect pests and diseases was found to be the earliest time points, i.e., between April 12 and 26.
Range dynamics of noctuid moths (Lepidoptera: Noctuoidea: Erebidae, Euteliidae, Nolidae, Noctuidae) in north-western Poland
A new species and family of beetle for Georgia (Sakartvelo): Arrhaphipterus schelkownikoffi Reitter, 1893 (Coleoptera: Rhipiceridae)
Abstract Arrhaphipterus schelkownikoffi Reitter, 1893, is reported from Georgia for the first time. Detailed information on the trapping localities, as well as photographs of the male, female, male genitalia, and empodium, are provided.
Effect of Maize Residual Nitrogen on Grain Yield and Composition of Subsequent Wheat Crops
Common wheat (Triticum aestivum ssp. vulgare) is one of the three basic cereal crops worldwide that plays a key role in global food security. A key factor affecting the yield and traits of common wheat is an adequate nitrogen supply. Improving the efficiency of soil nitrogen use can be achieved through the application of appropriate mineral fertilizers and the proper selection of cultivars. The aim of this study was to determine the impact of residual nitrogen (Nres) after maize cultivation (the preceding crop) on the yield and chemical composition of winter and spring wheat grain. It was shown that both the variety selection and the type of nitrogen carrier had a significant impact on the characteristics related to wheat yield and grain quality. The most stable effect of the type of nitrogen, regardless of the type of corn variety, was recorded for ammonium nitrate with N-Lock. The average yield was approximately 6.1 t ha−1. With the exception of the variant with N-Lock, the most progressive reaction to the type of fertilizer occurred in the stand with a three-line corn hybrid (TC, stay green). The advantage of this corn variety as a winter wheat forecrop results from the value of the site in a site without nitrogen. In the nitrogen control, the increase in yield compared to the single corn hybrid (SC) was 14%. However, in the U + N-Lock variant, it was 17%, and SG Stabilo as much as 32%. The increase in the weight of 1000 wheat grains in the stands after the SC and TC hybrid compared to stay green + roots power indicates a compensatory mechanism that became visible in the grain filling phase. Current challenges in agriculture caused by population growth and the need to ensure sufficient food production require greater awareness and knowledge regarding improved nitrogen management, including recognizing the role of residual nitrogen remaining in the soil after the preceding crop. A major advantage of slow-release fertilizers is that the nutrient (N) is released in response to the dynamic demand of the crop. This, on the one hand, increases grain yield and, on the other, does not negatively impact the agrosystem (eutrophication).
The taxonomic separateness of the species Aporophyla lueneburgensis (Freyer, 1848) and Aporophyla lutulenta ([Denis & Schiffermüller], 1775) occurring in Poland (Lepidoptera: Noctuidae)
Morphological and genetic comparisons were carried out of specimens of two sister species Aporophyla lueneburgensis (Freyer, 1848) and Aporophyla lutulenta ([Denis & Schiffermüller], 1775), which are distributed allopatrically in Poland. The specimens from different populations of these two species hardly differ morphologically but do differ genetically. The mean genetic distance between the groups of A. lueneburgensis and A. lutulenta examined here indicates that their geographic populations can be treated as belonging to separate species. Hence, A. lueneburgensis and A. lutulenta occurring in Poland can be regarded as two separate but sister species.
First record of Stegania trimaculata (de Villers, 1789) (Lepidoptera, Geometridae) in Poland, with comments on its distribution in Europe
The article reports on the first record of Stegania trimaculata (de Villers, 1789) (Lepidoptera, Geometridae) from western Poland. Its distribution in Europe and beyond is discussed, with particular focus on its eastward expansion and possible colonization of western Poland. The presence of this species in Asian countries is questioned in the light of possible confusion with Stegania dilectaria (Hübner, 1790) (Lepidoptera, Geometridae).
The Effect ofMaize Residual Nitrogen on Nitrogen Use Efficiency Indicators of Subsequent Wheat Crops
Silicon as a Predicator of Sustainable Nutrient Management in Maize Cultivation (Zea mays L.)
Field trials were conducted at the Field Experimental Station in Winna Góra. Weed control after maize sowing increased the grain yield by 15.7% compared to that after herbicide application at the BBCH 14/15 stage. Higher effectiveness of silicon application in maize cultivation can be achieved on plantations free from primary or secondary weed infestation. The application of a 50% NPK dose increased the grain yield by 8.6%, while a 100% dose improved it by 13.9% compared to that of the control object (without mineral fertilization). Furthermore, it was observed that the effectiveness of the silicon increased with higher total precipitation during the maize growing season, as evidenced by the results from 2022. In that year, the difference between the control (without silicon application) and the treatment with silicon applied at the BBCH 15/16 stage was more than 33%. The average mass losses from the green tea bags ranged from 54.9% to 71.9% in the variant of the sowing experiment carried out after spraying with the herbicide and from 69.4% to 72.4% in the variant with herbicide spraying at the BBCH14 stage. The rooibos tea’s mass losses were lower, as expected, and ranged from 18.6% to 36.4% in the first variant and from 30.8% to 38.6% in the second variant. The mass losses of the green tea and rooibos tea were the highest in the variant with herbicide spraying at the BBCH14 stage and the lowest in the variant of the sowing experiment carried out after herbicide spraying. The stabilization factor (S) ranged from 193 × 10−3 to 254 × 10−3 in sowing after herbicide spraying and from 188 × 10−3 to 226 × 10−3 in the variant with herbicide spraying at the BBCH14 stage. The k (decomposition constant) ranged from 7.8 × 10−3 to 11.5 × 10−3 in the first variant and from 7.2 × 10−3 to 13.4 × 10−3 in the variant with herbicide spraying at BBCH14.