Effect of date of sowing and weather factors on infestation of Atherigona soccata (Rondani) and yield parameters of forage sorghum

IF 0.8 4区农林科学 Q3 AGRONOMY Range Management and Agroforestry Pub Date : 2023-12-20 DOI:10.59515/rma.2023.v44.i2.11

Subhatma Bhuyan, Ravinder Kumar

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Abstract

Ecofriendly strategies for the management of sorghum shoot fly, helps in addressing the Atherigona soccataissues related to insecticides load on forage crop. The present study was carried out to know the suitable date of sowing on damage indices of sorghum shoot fly and green fodder yield in sorghum. The staggered sowing technique at a different time intervals was used, starting from 2 fortnight of March (12 SMW) to 1 fortnight of ndthstJuly (27 SMW). Oviposition in terms of eggs per 10 plants and dead heart percentage was recorded to be low thin 18 SMW (1 fortnight of May) sown crop (eggs: 6.66 and dead heart: 25.46%), but it was found to be highest thstin 1 fortnight of July (27 SMW) sown crop (eggs: 21.95 and dead heart: 65.45%). The correlation of shoot fly stthinfestation in relation to weather parameters revealed that egg load and dead hearts were negatively correlated with maximum temperature and positively correlated with minimum temperature, relative humidity and rain fall. Green fodder yield was recorded to be highest and lowest for the crop sown on 18 SMW (409 q/ha) and 27 ththSMW (302 q/ha), respectively. The study indicated that 1 fortnight of May was the best time to escape from the stsorghum shoot fly attack.

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播种日期和天气因素对 Atherigona soccata（Rondani）虫害及饲用高粱产量参数的影响

管理高粱梢蝇的生态友好型策略有助于解决高粱梢蝇与饲料作物上杀虫剂负荷相关的问题。本研究旨在了解播种日期对高粱梢蝇危害指数和青饲料产量的影响。研究采用了不同时间间隔的错期播种技术，从 3 月的第 2 周（12 个法定最低气温日）到 7 月的第 1 周（27 个法定最低气温日）。以每 10 株植物产卵量和死心率计算，在 18 个法定最低温度日（5 月的第 1 个双周）播种的作物上，卵产率较低（卵：6.66，死心：25.46%），但在 7 月的第 1 个双周（27 个法定最低温度日）播种的作物上，卵产率最高（卵：21.95，死心：65.45%）。射蝇虫害与天气参数的相关性表明，卵量和死心率与最高温度呈负相关，而与最低温度、相对湿度和降雨量呈正相关。青饲料产量分别以第 18 个工作周（409 q/ha）和第 27 个工作周（302 q/ha）播种的作物最高和最低。研究表明，5 月的第 1 个双周是躲避高粱嫩梢实蝇侵袭的最佳时机。

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来源期刊

Range Management and Agroforestry AGRONOMY-

CiteScore

1.50

自引率

62.50%

发文量

审稿时长

>12 weeks

期刊介绍： The Society has been established with the following objectives: 1. To advance the cause of research activity in all aspects of rangelands and to encourage and promote the studies on rangeland, wasteland ecosystems and agroforestry. 2. To provide facilities for seminars and conferences to rangeland researchers, development workers and farmers and to encourage close cooperation with organizations having related aims and interests. 3. To disseminate the knowledge of scientific agriculture and technology for forage and rangeland production, improvement and management.