Management of leaf blotch (Taphrina maculans Butler) and leaf spot (Colletotrichum capsici (Syd.) Butler &amp; Bisby) diseases in turmeric through ready-mix fungicides under field conditions

Gohel, N. M.; Mistry, Sneha J.; Rathava, Arjunsinh; Dhaduk, H. L.

doi:10.1007/s42360-021-00452-x

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“…4,25 Thiamethoxam could be absorbed by roots and transported upwards rapidly to control sucking mouthparts pests, but difenoconazole without root absorption was used only to control rice diseases by stem and leaf spray. [26][27][28] Surprisingly, this study showed that matrine could be rapidly absorbed by the roots, leaves and seeds of both pepper and wheat, and transmitted into all organs. At the same time, the systemic poisoning activity assessment also verified this property of matrine.…”

Section: Discussionmentioning

confidence: 67%

“…For example, the contents of imidacloprid sprayed were different in cotton flowers, leaves, nectary tissues and pollens, being highest in leaves, but not detected in the nectary tissues and pollens after seed treatment 4,25 . Thiamethoxam could be absorbed by roots and transported upwards rapidly to control sucking mouthparts pests, but difenoconazole without root absorption was used only to control rice diseases by stem and leaf spray 26–28 . Surprisingly, this study showed that matrine could be rapidly absorbed by the roots, leaves and seeds of both pepper and wheat, and transmitted into all organs.…”

Section: Discussionmentioning

confidence: 71%

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Matrine can be absorbed and transmitted bidirectionally to defend against aphids (Hemiptera: Aphididae) on wheat and pepper

Sun

Zhang

et al. 2023

Pest Management Science

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Background: Although matrine is widely used, its absorption and transport mechanisms in crops remain unexplored. In this study, three methods including foliar application, hydroponics and seed immersion were used to investigate whether matrine molecules could enter into plants through different channels, and to further resolve its transport characteristics. The systemic activity of matrine also was evaluated.Result: Matrine was quickly absorbed and transported downwards after the leaves of wheat or peppers were treated, and also accumulated and transmitted upwards by roots. It was not only absorbed by seeds, but also appeared continuously in young roots and leaves in both plants for nearly 20 days. There were some differences in the uptake and conduction of matrine between pepper and wheat: matrine concentrated in pepper upper leaves with less delivered downwards to roots than in wheat, and also transduction of matrine in pepper lower leaves upwards to upper leaves was less than in wheat. Matrine had systemic activity, with LC 50 of 361.99 and 904.24 ∼g•mL −1 against Rhopalosiphum padib on wheat and Myzus persicae (Sulzer) on pepper plants at 48 h, separately.Conclusion: Matrine can be absorbed by the roots, seeds and leaves of plants, and transmitted bidirectionally to any organs, presenting satisfactory systemic poisoning activity against aphids. It is of great significance to develop new formulation products of matrine and promote its commercialized value.

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