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Influence of seasonal changes, weather factors and soil depth on the foraging activities of subterranean termites in Eucalyptus plantations
International Journal of Tropical Insect Science ( IF 1.2 ) Pub Date : 2020-10-13 , DOI: 10.1007/s42690-020-00311-8
O. T. Alamu , F. K. Ewete

Eucalyptus tree is an important exotic species used for building construction, environmental amelioration and ornamental purposes in the tropics. However, termites cause a great damage and high mortality to seedlings and saplings of Eucalyptus in the field. Information on critical period and soil depth of termite foraging activities is required to formulate effective management programme. In this study, the critical foraging period and depth in the soil of subterranean termites in four different Eucalyptus species plantations was determined using the indices of percentages of baits attacked and consumed at in ground monitoring stations. The results showed that the highest and lowest percentages of baits attacked and consumed by termites were recorded in the months of February–April and August–October, respectively in all Eucalyptus plantations investigated. The critical depth of foraging activities recorded during the months of February–April was from 10 to 40 cm below the soil level as more than 50% and 40% of baits were attacked and consumed, respectively. Bait consumption by termites correlated significantly and positively with mean monthly temperature but correlated negatively and significantly with relative humidity and rainfall. This information on the critical season and depth of termite activities in the soil and as well the influence of weather factors on termite activities should be considered in the formulation of appropriate and effective termite management programme in the establishment of Eucalyptus plantation.

中文翻译:

季节变化、天气因素和土壤深度对桉树人工林地下白蚁觅食活动的影响

桉树是一种重要的外来树种,用于热带地区的建筑、环境改善和观赏用途。然而,白蚁在野外对桉树的幼苗和树苗造成很大的危害和很高的死亡率。需要有关白蚁觅食活动的关键时期和土壤深度的信息来制定有效的管理计划。在这项研究中,使用地面监测站攻击和消耗的诱饵百分比指数确定了四种不同桉树种人工林地下白蚁在土壤中的临界觅食期和深度。结果表明,白蚁攻击和消耗诱饵的最高和最低百分比记录在 2 月至 4 月和 8 月至 10 月,分别在所有被调查的桉树种植园中。在 2 月至 4 月期间记录的觅食活动的临界深度为土壤水平以下 10 至 40 厘米,因为分别有超过 50% 和 40% 的诱饵被攻击和消耗。白蚁的诱饵消耗与月平均温度呈显着正相关,但与相对湿度和降雨量呈显着负相关。在制定适当和有效的白蚁管理计划时,应考虑有关土壤中白蚁活动的关键季节和深度以及天气因素对白蚁活动的影响的信息。在 2 月至 4 月期间记录的觅食活动的临界深度为土壤水平以下 10 至 40 厘米,因为分别有超过 50% 和 40% 的诱饵被攻击和消耗。白蚁的诱饵消耗与月平均温度显着正相关,但与相对湿度和降雨量呈显着负相关。在制定适当和有效的白蚁管理计划时,应考虑有关土壤中白蚁活动的关键季节和深度以及天气因素对白蚁活动的影响的信息。在 2 月至 4 月期间记录的觅食活动的临界深度为土壤水平以下 10 至 40 厘米,因为分别有超过 50% 和 40% 的诱饵被攻击和消耗。白蚁的诱饵消耗与月平均温度显着正相关,但与相对湿度和降雨量呈显着负相关。在制定适当和有效的白蚁管理计划时,应考虑有关土壤中白蚁活动的关键季节和深度以及天气因素对白蚁活动的影响的信息。白蚁的诱饵消耗与月平均温度显着正相关,但与相对湿度和降雨量呈显着负相关。在制定适当和有效的白蚁管理计划时,应考虑有关土壤中白蚁活动的关键季节和深度以及天气因素对白蚁活动的影响的信息。白蚁的诱饵消耗与月平均温度显着正相关,但与相对湿度和降雨量呈显着负相关。在制定适当和有效的白蚁管理计划时,应考虑有关土壤中白蚁活动的关键季节和深度以及天气因素对白蚁活动的影响的信息。
更新日期:2020-10-13
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