Agricultural devastation reaches far beyond empty storehouses and physical hunger; it strikes at the very heart of spiritual life and national worship. The destruction of the land brings an abrupt end to the sacred joy experienced in the Temple. The primary approach among commentators is that the people face a painful reality, forced to watch helplessly as locusts descend upon the ripened grain and consume it completely [רש״י, רד״ק, מצודת דוד]. Alternatively, this vivid sight is understood as a prophetic vision. Even though the disaster has not yet fully unfolded, the prophet perceives the impending ruin with such sharp clarity that it feels as though the devastation is happening right in front of him [מלבי״ם].
This tragedy operates on two intertwined fronts. As physical sustenance is stripped from the fields, gladness and celebration are simultaneously severed from the House of God [אבן עזרא, מצודת דוד]. There are two primary ways to understand how the loss of crops directly silences the joy of the Temple. The central view links this silence to a severe shortage of wine. Because the vineyards have been ruined, there is no wine available to pour upon the altar. Without the pouring of the wine, the Levites cannot sing, as their sacred singing in the Temple was performed specifically during this ritual [מצודת דוד, מלבי״ם, אבן עזרא]. Another perspective suggests that the joy lost is specifically the celebration of the harvest festival. Since the grain was destroyed, the people are entirely unable to bring their holiday offerings, wiping out the profound joy that traditionally accompanied the harvest season in the Temple [רד״ק].