The cockhafer (Melolontha melolontha L.) is the most widespread and best known bug. It is a polyphagous bug, being harmful both in adulthood and in larva stage. The researches were conducted at Agricultural Research and Development Station (A.R.D.S.) of Secuieni, Neamţ county, Romania, and followed the evolution of adult flight, during 1993 - 2012 with a light trap help. The gatherings and records were made daily from 1 April to 31 October every year, during the observation period. Dividing the observation period into four stages of five years each, it was found that the largest number of specimens, 38059, was collected in the second stage (1998 - 2002), followed by the third stage (2003 - 2007) with 18167 specimens, first stage with 12173 specimens, and the lowest number of 286 specimens was recorded in the fourth stage (2008 - 2012). The adults flight started in all the years in the second or the third decade of April and lasted until the second or the third decade of May, with the exception of 1995 şi 2009 when he finished in the first decade of June. The average duration of the flight was 39 days. The maximum flight curve was reached, in all years of observation, in the third decade of April and first decade of May. The maximum intensity of flight curves was recorded every three years, as follows: 1994, 1997, 2000, 2003, 2006, 2009, 2012. This shows that, in Secuieni conditions, the insect has one generation at 3 years. Highest intensity of flights has been in the years 2000, when the top flight was conducted by 38059 specimens, 2003 with 13912 specimens/flight and 1997 with 10221 specimens/flight.

„Succesiv” is a monoecious hemp cultivar created at the Agricultural Research & Development Station Secuieni, registered in 2017 and obtained by isolation, complex hybridization on families (2011 - Z 7x4, M x 7, M 3x3, M 6x5, C x 9) and repeated selection. The new variety is characterized by long fibers with a length of 1.3-1.5 m in stem culture and 1.3-2.2 m in seed culture. The yield in the main crop is 4.2-5 t/ha fibers and 900-1200 kg/ha of seed, while in successive crops the seed yield reaches 800-1100 kg/ha.

In the conditions of the central area of Moldavia, losses in quantitative and qualitative wheat productions are determinated by pathogen agents which are transmitted by groundside and seed, like Fusarium sp. and Tilletia tritici, but also by some soil pests like the wire worms (Agriotes sp.) and the hunchback bug (Zabrus tenebrioides).The prevention or decreasing of the attacks was achieved in the conditions of the Agricultural Research and Development Station (ARDS) of Secuieni, Neamţ county, Romania, by the chemical treatment of the seed using a range of insectofungicides (Yunta 246 FS, Nuprid Max, Austral Plus Net, Lamardor + Gaucho, Yunta Quatrro, Yunta Succesor, Alios 300 FS). The experienced insectofungicides insured a good plant protection against the attack of Agriotes sp., the plants frequency at the untreated variant was 6.37% and between 0.77% and 1.42% at the treated variants, and against Zabrus tenebrioides species, the frequency of damaged plants at the untreated variant was 1.76%, compared

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ABSTRACT. This paper presents the enviromental testing research results of seven romania varieties of winter barley, experienced on Agricultural Research and Development Station (ARDS) of Secuieni, Neamţ county, Romania, during 2007 -2010. By this was followed the zoning of the most adjusted and efficient genotypes, increasing their biodiversity so that to reduce the genetic and ecological vulnerability of the agroecosystems. In the last three years (2007 -2010) was revealed the tendency of large fluctuations occurrence, both in terms of rainfall and temperature, from a normal crop year (2007 -2008) in a dry year (2008 -2009) and a rainy year (2009 2010). In the crop year 2009 -2010, because of spring weather conditions that favored the installation of pathogen agents (Erysiphe graminis f.sp. hordei, Pyrenophora graminea, Pyrenophora teres, Puccinia hordei), but especially of the rainfall fallen in the last decade of June, which negatively influenced the evolution of the barley crop and contributed to the quantity (by shaking the beans in the ear) and quality deteriorating of barley production, the winter barley yields were very small. On average over the three years of experimentation, the barley yields achieved ranged between 5232 kg/ha (Dana variety) and 6048 kg/ha (Sistem variety). Depending on the average production achieved during the three years of experimentation, top three ranked varieties are Sistem (6048 kg/ha), Andreea (5902 kg/ha) and Mădălin FD (5441 kg/ha). Regarding the resistance to abiotic and biotic stress factors, it has varied from year to year depending on variety. The romanian varieties were characterized by good resistance to lodging and brown rust.