Rossi Giovani, Mahas Jessica B, Chitturi Anitha, Graham Scott H, Jacobson Alana L
Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, USA.
J Econ Entomol. 2025 Feb 11;118(1):459-464. doi: 10.1093/jee/toae294.
Thrips (Thysanoptera: Thripidae) can injure seedling cotton (Gossypium hirsutum L.), soybean (Glycine max (L.) Merr.), and peanut (Arachis hypogaea L.) crops in the southern United States. The planting window and timing of thrips infestations into these crops overlap in the region, but thrips preference for oviposition has not been investigated. We evaluated thrips preference for cotton, soybean, and peanut by counting eggs, immatures, and adults at the cotyledon to 4 true leaf stages. Peanut was significantly more attractive for oviposition than cotton and soybean. Oviposition in cotton was significantly higher in the cotyledons than the other leaves. The highest oviposition in soybeans also occurred in the cotyledons but differed only significantly from the fourth true leaf. In all crops, there was no significant difference among oviposition in the true leaves. The highest number of immatures were found on cotton, followed by peanut and then soybean, while adults were evenly distributed among crops. Our results suggest that while peanut is preferred for oviposition, this crop may not facilitate immature development and survival as effectively when compared with cotton. This study presents an initial examination of crop selection by thrips under field conditions and suggests peanut may be the preferred oviposition host.
蓟马（缨翅目：蓟马科）会对美国南部的棉花（陆地棉）、大豆（大豆）和花生（落花生）幼苗作物造成损害。该地区这些作物的种植窗口和蓟马侵染时间存在重叠，但尚未对蓟马的产卵偏好进行研究。我们通过统计子叶期至4片真叶期的卵、未成熟蓟马和成虫数量，评估了蓟马对棉花、大豆和花生的偏好。花生对产卵的吸引力显著高于棉花和大豆。棉花子叶上的产卵量显著高于其他叶片。大豆上的最高产卵量也出现在子叶上，但仅与第四片真叶有显著差异。在所有作物中，真叶上的产卵量没有显著差异。未成熟蓟马数量最多的是棉花，其次是花生，然后是大豆，而成虫在作物间分布均匀。我们的结果表明，虽然花生是首选的产卵作物，但与棉花相比，这种作物可能无法有效地促进未成熟蓟马的发育和存活。本研究初步考察了田间条件下蓟马对作物的选择，表明花生可能是首选的产卵寄主。
