Cotton bollworm, Helicoverpa armigera (Lep. Noctouidae) is one of the key pests in cotton fields in Golestan province. In some areas the feeding of buds, bolls of cotton and cotton products will be damaged. In this survey a new insecticide product, karvin were tested on cotton bollworm and important natural enemies, coccinellids, chrysopids and braconid in the field of cotton in Golestan province during2013 – 2014. Six treatments ( larvin 1 kg/ha , karvin 1 lit/ha, karvin 1.5 lit/ha, karvin 2 lit/ha,avant 250 ml/ha and chek) with four replications were tested at a complete randomized block design in Gorgan. Sampling was done before and 3, 5, 7, 10 and 15 days after spraying. The mortality was calculated using Tilton- Hendrson formula were compared by Duncan s multiple rang test. The results revealed that average percentage of the best treatments for poison Karvin 1.5 lit/ha in 7 to 10 days after spraying with 81.25 – 100 % cotton bollworm and impact on the level 5 % were in group A and other treatments karvin 2 lit/ha with 71.88%, larvin 1 kg/ha 61.50 % and avant 250 ml/ha 56.25 % were the next groups. Therefore, we recommended the new insecticide Karvin with no significant adverse for controlling of cotton bollworn for the next year.

Cotton is one of the strategic and industrial products in the world. From 1970 in the province of West Azerbaijan due to secondary pests of cotton Red worm (Pectinophora malvella) that can be transmitted through the seed, and the risk of transmission to other parts of the country are prone cotton, cotton cultivation is prohibited. According to research conducted over three years, the results indicate that hunting moths in pheromone traps in the second Red worm first half of May recorded and Red worms secondary pest activity from late May to coincide with the start of the Althaea spp. plant flowering in June and the spawning population reaches maximum. At the end of June and the first half of July with a peak population has been recorded in pheromone traps.With warm weather in July and August the Althaea spp. plant drying plant pest population is reduced. Research on the biology the Althaea spp under natural conditions environment by installing cage Althaea spp. Plant was studied in 4 replicates. The embryonic eggs 3 to 5 days of the larval and pupal period 12 to 14 days 11 to 13 days and over a period of generation of 26 to 32 days in the average temperature of 25 ± 2 ° C and average relative humidity lasted 65 ± 5 percent in Golestan province.

Nitrogen is primary element that is absorbed relatively early in plant’s life. It is most important element that affects the growth and development of tobacco plant and the quality of leaf tobacco. This study was performed in order to understand more nitrogen uptake changes between varieties of tobacco, six varieties of tobacco were examined, DRVI, DRV10, Madole, Kentucky 171, Toleza 68 and Western for absorption and accumulation determination nitrogen in different plant parts at stages of growth, and quality characteristics. Plants were grown in a unheated greenhouse in March, and then seedling transplanted into the field in spring, and in a randomized complete block design (RCBD) was planted with four blocks in field of Tirtash Tobacco Research Institute. Results showed that there were significant differences between different cultivars in percentage of root nitrogen, leaf nitrogen and percentage of sugar. But percentage of stem nitrogen, nicotine, total ash and burning time were not different between varieties. Amount of nitrogen in different plant parts varieties were different at different stages of growth. The maximum and minimum absorption of nitrogen was observed at early and late stages of growth (4258 and 94-122 days after planting), respectively.

Potash is primary element that is absorbed relatively early in plant’s life. It is most important element that affects the growth and development of tobacco plant and the quality of leaf tobacco. This study was performed in order to understand more clearly Potash uptake different varieties of tobacco in quality and chemical characteristics, varieties of tobacco were examined, DRVI, DRV10, Madole, Kentucky 171, Toleza 68 and Western for absorption and accumulation determination potash in different plant parts at stages of growth, and quality characteristics. Plants were grown in a unheated greenhouse in March, and then seedling transplanted into the field in spring, and in a randomized complete block design (RCBD) was planted with four blocks in field of Tirtash Tobacco Research Institute. Results showed that there were significant differences between different cultivars in percentage of root potash, stem potash and percentage of sugar. But percentage of leaf potash, nicotine, total ash and burning time were not different between different varieties. Amount of potash in different plant parts varieties were different at different stages of growth. The maximum and minimum absorption of potash were observed at early and late stages of growth (42-58 and 94-122 days after planting), respectively.