论文部分内容阅读
棉鼎点金刚钻在湖南每年发生5—6代,以6代为主。第1—2代在早春奇主上发生,6月下旬开始迁入棉田,以第3—6代在棉花上发生,但第3—4代为害较大。各代及各虫态历期,以及各虫态主要习性均曾加以记述。 1959—1961年调查证明:棉田中鼎点金刚钻幼虫盛发期较适宜的气候条件为:每五日平均气温26—30℃、相对湿度80％以上、温湿系数2.7—3.3。密植棉田受害较重。岱福棉、岱红2343受害最轻,宁棉13号、南通一、二号较重。
Cotton tripod diamonds occur every year in Hunan 5-6 generations, mainly to 6 generations. The first 1-2 generations occurred in the early spring odd master, began to move into the cotton field in late June, 3-6 generations occurred in the cotton, but 3-4 generations of larger damage. All generations and the worm’s life, as well as the main habits of the worm have been described. From 1959 to 1961, it was proved that the suitable climatic conditions during the full-bodied diamond-worm larvae development in Zhongtian were as follows: the average temperature was 26-30 ℃ every five days, the relative humidity was above 80% and the temperature and humidity coefficient was 2.7-3.3. Thicker cotton fields suffer more. Dai cotton, Daihong 2343 suffer the least, Ning cotton on the 13th, Nantong one, two heavier.