火蚂蚁(Solenopsis Invicta
)
colonies surrounding strawberry plants in Chowan County, NC. Photo: HJB, 2008
除作物害虫外,春季还带来了其他潜在的有问题的节肢动物。上周,我详细介绍了
春季害虫管理杂务在草莓中,但我没有提到火蚂蚁。消防蚂蚁是北卡罗来纳州的侵入性害虫,但在已经建立的县的小水果生产中是普遍关注的问题。NCDA在这些县维护了一个针对消防蚂蚁的隔离计划,可以找到2010年的隔离区
here。消防蚂蚁不是小水果中的农作物害虫(尽管它们可以在烟草温室中),而是一种危害公共卫生的危害,尤其是对于商业运营中的采摘者和您采摘操作中的客户。
火蚂蚁通常会在秋季春季侵扰草莓田,并且可能选择这些地点,因为地面在黑色塑料下保持温暖和/或因为它们被滴水线吸引到水中。
Fire ant mounds near strawberry fields in Orange County, NC. Photo: HJB, 2008
There are 2 methods of controlling fire ants chemically: contact materials and baits. I prefer bait products because they are more likely to eliminate colonies when used properly. Contact materials (mound drenches) may provide a short term knock down, but unless the entire colony is treated, the fire ants will eventually rebound. Spring is a good time to use baits for fire ants because these materials take a few weeks to eliminate colonies, which means they will do their job by the time picking begins. Consult the
NC农业化学手册和
东南小水果IPM指南for the specific baits registered and label rates in the crop you will be treating. (
关于农药建议的注释)
In anticipation of some of the questions I may get from the strawberry community--applications through the drip may be tempting for fire ants, but these will probably not go deep enough into the soil to treat entire mounds and therefore will only offer at the most temporary benefit.
The most important consideration when using baits in the spring is
timing。为了有效,必须在积极觅食时使用诱饵,因为蚂蚁必须将它们捡起并将诱饵送回巢穴,在那里他们将杀死殖民地。在温度大于70 F且蚂蚁觅食的日子中,最佳的诱饵时间是早晨。您可以使用“马铃薯片测试”检查觅食活动。将土豆片或奶酪泡芙在土墩附近。如果在30分钟之内,蚂蚁找到了芯片,它们正在觅食,现在是治疗的好时机。
这 ”
两步法“当然是由得克萨斯州的推广专家开发的,在2-3周后伴随着土墩淋浴的诱饵治疗,是处理大型,持久侵扰的好工具。最好与您的合作社推广代理联系以获取建议以获取建议以获取建议淋湿是因为为此目的以小果标记的产品很少。
There are organic bait and drench treatments which may be used in small fruits, and I or your cooperative extension agent can provide more information on these as well.
A group of NCSU extension entomologists conducted an Elluminate webinar on fire ant management in a wide range of cropping systems in February 2009. I participated in this webinar
,,,,可以在线查看
here。The entire webinar is 2.5 hours and covers fire ant management in homes, nurseries, field crops, fruits, and vegetables as well fire ant regulations in NC. Log in as a guest to view the presentation, which will download as a Java document. The password for the presentation is
rifa.您将需要扬声器和/或耳机才能听到演示文稿。
More on fire ant biology and management can be found in this
Structural, Residential, and Community Insect Pest Note经过
查尔斯·阿普森(Charles Apperson)和
Mike Waldvogelfrom the
NCSU Entomology Department.
Update
下面嵌入的是我在2009 Fire Ant网络研讨会中的幻灯片,为那些不想听整个会话的人。