نوع مقاله : کامل علمی - پژوهشی
نویسندگان
1 Iranian Research Institute of Plant Protection No. 1, Yaman (Tabnak) St., Chamran Highway, Tehran, Iran
2 استادیار پژوهش مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان همدان، سازمان تحقیقات آموزش و ترویج کشاورزی همدان، ایران همدان
3 استادیار پژوهش مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان آذربایجان غربی، سازمان تحقیقات آموزش و ترویج کشاورزی، ارومیه، ایران
4 استادیار پژوهشی مؤسسه تحقیقات اصلاح و تهیه بذر چغندرقند- سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران
5 بخش تحقیقات گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کرمانشاه، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرمانشاه،
6 استادیار مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی آذربایجان‌غربی، سازمان تحقیقات، آموزش و ترویج کشاورزی، ارومیه، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In recent years, variation in the pattern of sugar beet cultivation from seed planting to the seedling planting, with the aim of saving irrigation consumption, has been remarkably considered. In this study, the population density of armyworm "Spodoptera exigua (Hübner)" and long-stemmed weevil "Lixus incanescens Boh." was evaluated in both seed and seedling planting methods in sugar beet fields in three cities of Hamdan, West Azarbaijan and Kermanshah. Sampling was performed from the 6-leaf stage in seed planting and one week after transplanting the seedlings to the field for seedling planting. From this purpose, 10 points were randomly selected from each type of planting methods by quadrat and the presence of the above pests was recorded weekly (for eight weeks). Comparing the data with the non-parametric method (Kruskal-Wallis) showed that the mean population density of armyworm in Hamadan province for seed and seedling were 4.50 and 1.29 larvae/m2, respectively for the first year, and 6.98 and 8.81, larvae/m2, respectively for the second year with significant difference (X2(3)=11.515 and P=0.009). In West Azarbaijan province, the means of larvae/m2 were 1.20 and 1.84 for seed and seedling planting in the first year and 0.59 and 1.67 for seed and seedling planting for the second year, respectively (X2(3)=10.491 and P=0.015), but no difference for the Kermanshah data (X2(3)=6.326 and P=0.097). While the mean population density of the sugar beet weevil in Hamedan provincewere1.80 and 1.79 adults/m2 for seed and seedling planting in the first year, and 7.88 and 6.91 adult/m2 for seed and seedling planting in the second year, respectively (X2(3)=15.610 and P=0.0014). However, no significant difference was observed for sugar beet weevil for the other two provinces (for West Azerbaijan X2(3)=3.203 and P=0.361 and for Kermanshah X2(3)=2.597 and P=0.458). In general, it can be said that the density of these two pests in the fields during the two years of evaluation was not affected by the planting method, however other indicators including environmental conditions are more effective on their density
کلیدواژه‌ها [English]
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