Number of lesions, severity and incubation period of isolates of Corynespora cassiicola in soybean cultivars

IF 0.8 4区农林科学 Q3 AGRONOMY

Ciencia Rural Pub Date : 2023-04-14 DOI:10.1590/0103-8478cr20220278

Jacqueline Dalbelo Puia, A. T. Hoshino, G. D. Shimizu, A. Moreira, Sandra Cristina Vigo, M. G. Canteri

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引用次数: 0

Abstract

ABSTRACT: This study checked the severity and incubation period of isolates of Coryneporacassiicola (C.c) in soybean cultivars, as well verified whether the position of leaflets influences the susceptibility of the plant to target spot. The experiment was conducted in randomized block with 8 isolates of C.c and 8 soybean cultivars factorial scheme, with five repetitions each block. The plants were inoculated with suspension from 2x104 conidia mL-1. The number of lesions per leaf and the incubation period (IP) were evaluated. The ISO 4S isolate caused greater number of lesions in plants. BMX Potência RR, BMX Força RR, and NA 5909 RG had the lowest occurrence of lesions, while the cultivar BMX Elite IPRO showed the highest number of lesions. More lesions were detected in the lower leaf compared to the upper leaf of the plants. The longest IP was observed for ISO 4S in both leaflets, while the lowest IP for ISO 1A, 3A and 2A in the lower leaf, and for ISO 11S and 1S in the median leaf. For cultivars, significant difference in IP was observed only in the lower leaf, with the longest and shortest IP detected for BMX Elite IPRO and BRS 284, respectively. In general, the upper leaf of the plants presented the shortest IP while the lower leaf had the longest IP.

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大豆品种桃核孢子病的发病数、严重程度及潜伏期

摘要/ ABSTRACT摘要:本研究测定了大豆品种中Coryneporacassiicola (C.c)分离株的严重程度和潜伏期，并验证了小叶位置是否影响植物对靶斑的敏感性。试验采用8株大肠杆菌和8个大豆品种的随机区组，每个区组5个重复。用2x104分生孢子mL-1的悬浮液接种植株。评估每片叶片的病变数和潜伏期(IP)。iso4s分离物在植物中引起较多的病变。BMX Potência RR、BMX fora RR和NA 5909 RG的发病率最低，而BMX Elite IPRO的发病率最高。与植物的上部叶片相比，下部叶片检测到更多的病变。其中，ISO 4S在两个叶片中IP最长，ISO 1A、3A和2A在下叶中IP最短，ISO 11S和1S在中叶中IP最短。不同品种间，只有下叶的IP值存在显著差异，其中BMX Elite IPRO和BRS 284的IP值最长、最短。总体上，植物上部叶片IP最短，下部叶片IP最长。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ciencia Rural AGRONOMY-

CiteScore

1.70

自引率

0.00%

发文量

233

审稿时长

2-4 weeks

期刊介绍： The purpose of Ciência Rural is to publish the results of original research, note and reviews which contribute significantly to knowledge in Agricultural Sciences. Preference will be given to original articles that develop news concepts or experimental approaches and are not merely repositories of scientific data. The decison of acceptance for publication lies with the Editors and is based on the recommendations of Editorial Comission, Area Committee and/ or ad hoc reviewers. The editors and reviewers are external to the institution.