Differentiation of valuable for breeding sunflower lines by resistance to Phoma rot

The purpose of the research is differentiation of valuable for breeding sunflower lines by resistance to Phoma rot. The promising constant sunflower lines were estimated by their resistance to Phoma rot using methods of artificial inoculation in the greenhouse and laboratory conditions. In greenhouse conditions, there were used two methods of artificial inoculation with a fungus Plenodomus lindquistii in the bottom of leaf petiole of a sunflower plant at a stage of the first true leaf pair. Application of the pieces of agar nutrient medium with mycelium, pycnidia and picnospores (unbroken) allowed to identify resistant and mid-resistant sunflower lines (VK 900, L 86 and L 107, L 132). At inoculation with 0.2 ml of a fungus spore suspension (concentration of 1 × 106 spores/ml), five susceptible and one very susceptible sunflower lines (L 2385, L 103, L 136, L 131, L 128, and L 82) were determined. In laboratory conditions, the quick test for estimation of susceptibility to Phoma rot (dose of infection – 12 g) allowed to reveal more than 50 % of plants with healthy root system and two constant sunflower lines L 116 and L 136 with the affection degree of one point. Estimation of susceptibility to Phoma rot infection of the different organs (stem and root system) at artificial inoculation showed a possibility to differentiate sunflower lines by resistance of roots and stems and to select the most promising for the further work in breeding.

Biological Control of Acaudalerodes Rachipora (Singh) (Hemiptera: Alerodidae) by the Entomopathogenic Fungi on in Field

This study was conducted in the College of Agriculture fields /University of Baghdad, during Autumn 2013. This study was aimed to examine the mortality rate on the all black fly stages of Acaudalerodes rachipora Singh) by the biotic fungus Beuveria bassiana. The results of a preliminary survey showed that the samples of Ziziphus spaina christi were infested by blakflies in Agriculture collage during Autumn seasons of 2013 , the presence of species of black flies A. rachipora on the lower surface of the leaf, the study aimed to study and research the effects of fungus B. bassiana on black fly A. rachipora. After six days of treatment results showed the continued superiority 106 spore / ml trends in the western, southern and eastern being 34.64, 31.77 and 20.8% respectively, while outweigh the moral fungus concentration 108, which was treated by insect instars in the direction north by killing 26.32% on the rest concentrations of fungus, which was treated by insect instars to the same direction the latter, note from the results above the high mortality rates with time as increased rates of initial mortality rates,. Finally reflected clearly outweigh the concentration of 108 fungus spore / ml in all directions western, southern, northern and eastern mortality rates 65.35, 62.84, 50.89 and 46.34%, respectively, compared with mortality rates made by the concentrations of other used in the experiment of the directions of the four that did not show significant differences in their impact on the roles of insect and thus increased mortality rates in the field with the time. We recommend conducting further field studies of fungus to determine the extent of efficiency in the field, according to local conditions and to determine its role in regulating the population of black flies and study the compatibility of the fungus with other control methods.

UJI EFEKTIVITAS EKSTRAK ASETON DAUN KAYU MANIS (Cinnamomum burmanni Blume) TERHADAP JAMUR FUSARIUM SOLANI PENYEBAB PENYAKIT BUSUK BATANG PADA BUAH NAGA (HYLOCEREUS SP.) SECARA IN VITRO

This research heads for examining the effectiveness of acetone extract of cinnamon leaf (Cinnamomum burmanni Blume) to the growth of Fusarium soloni fungus. Cinnamon leaf which was used in this research grows in Bedugul village Tabanan regency Bali province. The extract effectiveness experiment of cinnamon leaf to the fungus experiment was carried out by well difusion method in Biopesticide Laboratory of Agriculture Faculty Udayana University, by using the complete random plan consists of 6 treatments and 4 times refrains. The concentration treatment of acetone extract of cinnamon leaf obviously (P<0.05) can impede the growth of colony, biomass and establishment of experiment fungus spore i.e. Fusarium soloni in accordance with in-vitro by PDA and PDB media. Extract minimum blocked energy of cinnamon leaf in experiment fungus i.e. 0,5%. The extract of cinnamon leaf obviously can impedethe growth of colony, spore establishment and biomass establishment of experiment fungus. In extract concentration treatment 0.5% obviously can impede the colony growth of experiment fungus, spore establishment and fungus biomass establishment i.e. each of them in amount of 17,3%, 41,45% and 7,94% if they are compared by the control. The higher extract concentration then the blocked energy is the bigger.

Tendrils as a source of seasonal carryover of Botrytis cinerea in vineyards

Botrytis bunch rot is a disease that requires management under New Zealand conditions in order to prevent financial losses for wine grape producers A survey was conducted to investigate the potential spore production of tendrils in 16 vineyards from the Marlborough and Hawkes Bay wine growing regions Significant differences in spore production potential of tendrils were detected between sampling before flowering and after fruit set Significant regional differences were also detected with tendrils from Marlborough producing fewer spores Under ideal laboratory conditions for incubation of the fungus spore production by tendrils was low at the start of the season and was reduced further following application of the industry standard fungicide programme Based on these experiments and a review of other data it is recommended that tendril removal is not required at pruning as part of vineyard disease management