Maktabgacha yoshdagi bolalar faoliyatida o’yinning mohiyati va o’ziga xosligi

Maqolada maktabgacha yoshdagi bolalar shaxsiyatini shakllantirishning muhim davr ekanligi, pedagogik faoliyatda o’yinning ahamiyati va muvofaqiyatlari, bolalarning shaxsini, aqliy-axloqiy va irodaviy fazilatlarini shakllantirishda pedagogning o’rni, o’yin turlari, mashxurlarning fikrlari, ta’lim sifatini oshirishda o’yinnig afzalliklari haqida ma’lumotlar keltirilgan

First record of Pteromalus varians (Hymenoptera: Pteromalidae) parasitizing on Tischeria ekebladella (Lepidoptera: Tischeriidae) in Hungary

Pteromalus varians (Spinola, 1808) is fi rstly recorded from Quercus leaves, mined by the trumpet leafminer moth Tischeria ekebladella (Bjerkander, 1795) in forests near Budapest, Hungary. A total of 392 parasitoids were reared in laboratory conditions, from which 14 females and 362 males belong to P. varians. A short review on the host range of P. varians is given. Known biological relationships of Tischeria to some other pteromalids and a possible similarity between host ranges of P. varians and Pteromalus semotus are also commented. With 2 figures

Ефект на Beauveria bassiana (щам ATCC 74040) върху два вида листояди вредители по царевицата в лабораторни условия

In some European countries, the Western corn rootworm, Diabrotica virgifera virgifera, and the cereal leaf beetle, Oulema melanopus, are present in maize stands in high population density, occasionally causing damage of the crops. Susceptibility of adults of these species and larvae of the cereal leaf beetle to the commercially available product Naturalis® based on Beauveria bassiana strain ATCC 74040 was explored in laboratory conditions. The results of the bioassays showed that the fungal strain caused the highest corrected mortality on O. melanopus larvae with average values above 95% for all conidia concentrations (from 2.3 × 102 to 2.3 × 107 conidia/ml) tested. For the adults of the two pests, the average mortality increased positively with concentration of conidia and the values ranges from 9.5% to 94.2% for O. melanopus (concentrations from 2.3 × 102 to 2.3 × 107 conidia/ml) and from 19.3% to 92.4% for D. v. virgifera (concentrations from 2.3 × 103 to 2.3 × 107 conidia/ml). Accordingly, the LC50 values for O. melanopus larvae and adults and D. v. virgifera adults were determined as 4.6, 8.3 × 104 and 4.3 × 105 conidia/ml, respectively. Further studies to confirm the susceptibility of the larvae of the cereal leaf beetle to Naturalis® under field conditions should be conducted.В някои европейски страни западният царевичен коренов червей Diabrotica virgifera virgifera и обикновената житна пиявица Oulema melanopus присъстват в царевичните площи във висока плътност, нанасяйки щети на културите. В лабораторни условия беше изследвана чувствителността на възрастните индивиди от тези видове и ларвите на обикновената житна пиявица към търговския продукт Naturalis®, който съдържа Beauveria bassiana (щам ATCC 74040). Резултатите от опитите показват, че гъбният щам причини най-високата коригирана смъртност на ларвите на O. melanopus със средни стойности над 95% за всички изпитани концентрации на конидиите (от 2.3 × 102 до 2.3 × 107 конидии/ml). За възрастните на двата вида вредители средната смъртност нараства с увеличаване на концентрацията на конидиите и стойностите варират от 9.5% до 94.2% за O. melanopus (концентрации от 2.3 x 102 до 2.3 × 107 конидии/ml) и от 19.3% до 92.4% за D. v. virgifera (концентрации от 2.3 × 103 до 2.3 × 107 конидии/ml). Cтойностите на LC50 за ларвите и възрастните на O. melanopus и възрастните индивиди на D. v. virgifera бяха съответно 4.6, 8.3 × 104 и 4.3 × 105 конидии/ml. Необходимо е да се проведат допълнителни изследвания за потвърждаване на високата чувствителност на ларвите на обикновената житна пиявица към Naturalis® в полеви условия

The Addition of a Pheromone to a Floral Lure Increases Catches of Females of the Click Beetle Agriotes ustulatus (Schaller) (Coleoptera: Elateridae)

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Agriotes proximus and A. lineatus (Coleoptera: Elateridae): a comparative study on the pheromone composition and cytochrome c oxidase subunit I gene sequence

The presence of geranyl octanoate, previously found in pheromone gland extracts of Agriotes lineatus females, was also demonstrated in gland extracts of A. proximus females. Similar to A. lineatus, geranyl butanoate was present only in trace amounts in A. proximus female gland extracts. In air entrainment samples of female A. lineatus and A. proximus beetles, the relative ratio of geranyl butanoate and geranyl octanoate was higher than that in gland extracts. In addition, comparison of a segment of the mitochondrial cytochrome c oxidase subunit I gene of feral specimens of A. lineatus and A. proximus showed [99% similarity. Both pheromone profile and nucleotide sequence analysis delineate close relationship between the investigated taxa and postulate taxonomic revision. Further studies on sympatric populations of A. lineatus and A. proximus are underway to investigate and better understand possible processes of species diversification