Since inter-plant communications are known to occur only at short distances [24,25], we separated ‘receiver’ and ‘emitter’ plants by a short distance (,30 cm, see Figure S1). After exposure, a T. urticae adult female was placed on the leaf sections of the receiver lima bean plants, and the oviposition of her eggs was counted every 24 hours for up to 3 days (Figure 2A). VOCos-receiver bean leaves exhibited a lower rate of oviposition of T. urticae than the VOCwt- receiver leaves for up to 3 days (P,0.05, Student’s t-test). Likewise, lower weight gain of common armyworm (M. separata) larvae was observed on maize plants 2 and 3 days after exposure to VOCos, compared to those exposed to VOCwt (P,0.05, Student’s t-test; Figure 2B).