人参病虫害.doc

人参病虫害防治虫鼠
Insects 昆虫
Ginseng has very few insect 。 However, there are a few that can occasionally cause ,也有少数有时可能会导致问题。 Some that may cause problems are the 。
Cutworms 地老虎
Characteristics: Cutworms are the larvae of noctuid moths. 特点:地老虎是蛾幼虫夜蛾。 There are several species that mon pests of various vegetable 。 The caterpillars vary in colour but are usually brown or ,但通常为棕色或灰色。 They are smooth skinned, and curl up when ,而卷曲时感到不安。 Cutworms vary in size, but reach 35 to 45 mm in length when fully ,但其长度可达35至45毫米时完全长大。 They feed below or at ground level, and are active at ,并在夜间活动。 A few species feed higher on the plant and are referred to as climbing ,被称为登山地老虎的。 Plants that have been attacked by cutworms have their stems severed at or just below the soil 。
Control: Cutworms have not been reported as a problem in the Atlantic region, but the potential for damage still exists. 控制:地老虎尚未见报道作为一个地区问题,在大西洋,但伤害的潜力仍然存在。 There are no chemicals registered for cutworms on 。 Fallowing the site the year before planting will reduce the number of weeds that may attract cutworms into the 。 It may also be possible to control cutworms in crops and areas a