Almada Melina Soledad, Sosa María Ana, González Alda
Centro de Estudios Parasitológicos y de Vectores (CEPAVE) (CONICET LA PLATA- UNLP), Calle 2 N0 584 (1900) La Plata, Argentina.
Rev Biol Trop. 2012 Jun;60(2):611-23.
Spiders have considerable potential importance for their role as predators to some pests in agricultural systems. The composition of spiders in transgenic and conventional cotton at the Research Station of INTA Reconquista (Santa Fe) was studied during the 2005-2006 season. The experiment was a complete randomized block design with three replications and three treatments: transgenic Bt cotton (ALBt), conventional cotton without chemical control (ALCSC), and conventional cotton with chemical control (ALCCC). Weekly, spiders were collected using nets, vertical cloth and pitfall-traps. A total of 1255 specimens (16 families, and 32 species) were collected. Seven families were found in all the treatments, mainly Thomisidae (n=1 51, 84.04%) and Araneidae (n=83, 6.64%). The Hunting spiders guild ambushers (n=1053, 83.91%), "Orb weavers" (n=85, 6.77%) and "Stalkers" (n=53, 4.22%) were more abundant. There were no significant differences in the indexes diversity between treatments. Spiders were presented during the whole crop season, with peaks about flowering and boll maturity, with the highest abundance in ALBt. This work is part of the first set of data registered in Argentina about spider's community in cotton crops.
蜘蛛作为农业系统中某些害虫的捕食者，具有相当大的潜在重要性。2005 - 2006年期间，对位于圣达菲省雷孔基斯塔的国家农业技术研究所研究站的转基因棉花和常规棉花中的蜘蛛组成进行了研究。该实验采用完全随机区组设计，有三次重复和三种处理：转基因Bt棉花（ALBt）、无化学防治的常规棉花（ALCSC）和有化学防治的常规棉花（ALCCC）。每周使用网、垂直布和陷阱诱捕器收集蜘蛛。总共收集了1255个标本（16个科，32个物种）。在所有处理中都发现了七个科，主要是蟹蛛科（n = 151，84.04%）和园蛛科（n = 83，6.64%）。游猎蜘蛛类群伏击者（n = 1053，83.91%）、“圆网蛛”（n = 85，6.77%）和“潜行者”（n = 53，4.22%）数量较多。各处理间的多样性指数没有显著差异。蜘蛛在整个作物季节都有出现，在开花期和棉铃成熟期出现高峰，在ALBt中数量最多。这项工作是阿根廷关于棉花作物蜘蛛群落的首批登记数据的一部分。
