Greenhouse and field‐based studies on the distribution of dimethoate in cotton and its effect on Tetranychus urticae by drip irrigation. Issue 1 (26th September 2017)

• Record Type: Journal Article
• Authors: He, Jiangtao; Zhou, Lijuan; Yao, Qiang; Liu, Bo; Xu, Hanhong; Huang, Jiguang
• Is Part Of: Pest management science. Volume 74:Issue 1(2018)
• Page Start: 225
• Page End: 233
• Publication Date: 2017-09-26
• Subjects: Tetranychus urticae -- dimethoate -- drip irrigation -- control; Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.4704
• Languages: English
• ISSNs: 1526-498X

Abstract

Abstract: BACKGROUND: The two‐spotted spider mite, Tetranychus urticae Koch is an important pest of cotton. We investigated the efficacy of dimethoate in controlling T. urticae by drip irrigation. Greenhouse and field experiments were carried out to determine the efficacy of dimethoate to T. urticae and the absorption and distribution of dimethoate in cotton. RESULTS: Greenhouse results showed that cotton leaves received higher amounts of dimethoate compared with cotton roots and stems, with higher amounts in young leaves compared with old leaves and cotyledon having the lowest amounts among leaves. Field results showed the efficacy of dimethoate to T. urticae by drip irrigation varied by volume of dripping water, soil pH and dimethoate dosage. Dimethoate applied at 3.00 kg ha –1 with 200 m 3 ha –1 water at weak acidic soil pH (5.70–6.70) through drip irrigation can obtain satisfactory control efficacy (81.49%, 7 days) to T. urticae, without negatively impacting on its natural enemy Neoseiulus cucumeris . The residue of dimethoate in all cotton seed samples were not detectable. CONCLUSIONS: These results demonstrate the effectiveness of applying dimethoate by drip irrigation for control of T. urticae on cotton. This knowledge could aid in the applicability of dimethoate by drip irrigation for field management of T. urticae populations. © 2017 Society of Chemical Industry Abstract : T. urticae is an important cotton pest. Dimethoate applied at 3.00 kg ha ‐1 with 200 m 3 ha ‐1 water at soil pH values (5.70‐6.70) by drip irrigation can effectively control it.