。
The cold weather delayed the growth of the rice.
Literal
Cold weather [subject-が] rice [of-の] growth [object-を] delayed.
稲 (いね) is 'rice plant' — the plant growing in the paddy, not the grain eaten (米 こめ) or the cooked rice (ご飯 ごはん). Japanese distinguishes all three. 発育 ('growth, development') is used for organisms. 遅らせる is the transitive form of 遅れる ('to be late') — 'to delay.'