Entomology Department, Federal University of Lavras, Lavras, Brazil.
Laboratory of Entomology, Brazilian Agricultural Research Corporation, Embrapa Dairy Cattle, Juiz de Fora, Brazil.
Pest Manag Sci. 2019 Dec;75(12):3282-3292. doi: 10.1002/ps.5450. Epub 2019 May 21.
Great efforts have been made to identify grasses that are resistant to spittlebugs (Hemiptera: Cercopidae). However, the time required to develop and launch new cultivars is relatively long. The employment of resistance inducers is a current strategy that may be useful for the control of insect pests. This analysis evaluates the feasibility of using the chemical inducers silicon and nitric oxide to increase spittlebug resistance based on changes in forage grass vegetative characteristics and the biological traits of Mahanarva spectabilis (Distant, 1909).
Mahanarva spectabilis nymphs and adults can cause significant damage to forage grasses. Furthermore, silicon and nitric oxide inducers were not sufficient to lessen this damage by positively influencing the growth and development of forage grasses. These inducers did not negatively alter the biological parameters of M. spectabilis or diminish its population. However, phenolic compound concentrations increased when forage grasses were treated with silicon or attacked by adult insects, but this parameter was not useful to predict spittlebug resistance. This fact suggests that the physiological and biochemical changes caused by silicon should be further studied.
The current analysis demonstrated that application of the chemical inducers silicon and nitric oxide is currently not a viable strategy for the effective and economic management of M. spectabilis on Brachiaria ruziziensis, Pennisetum purpureum and Digitaria sp. © 2019 Society of Chemical Industry.
人们已经做出了巨大的努力来鉴定抗沫蝉（半翅目：沫蝉科）的草种。然而，开发和推出新品种所需的时间相对较长。因此，使用抗虫诱导剂可能是控制害虫的一种有效策略。本分析评估了基于饲料草营养生长特性和大紫叶蝉（Distant，1909）生物学特性的变化，使用化学诱导剂硅和一氧化氮来提高沫蝉抗性的可行性。
大紫叶蝉若虫和成虫会对饲料草造成严重损害。此外，硅和一氧化氮诱导剂不足以通过积极影响饲料草的生长和发育来减轻这种损害。这些诱导剂不会对大紫叶蝉的生物学参数产生负面影响，也不会降低其种群数量。然而，当饲料草用硅处理或受到成虫侵袭时，酚类化合物的浓度会增加，但该参数对预测沫蝉的抗性没有帮助。这一事实表明，应该进一步研究硅引起的生理和生化变化。
目前的分析表明，目前应用化学诱导剂硅和一氧化氮不是一种有效的策略，可以有效地、经济地管理大紫叶蝉对臂形草、紫狼尾草和狗尾草的危害。© 2019 化学工业协会。
