Effect of atrazine and green fertilizer (tithonia diversifolia) on weed growth and corn productivity

The research aimed to analyze the effect of atrazine and Tithonia diversifolia green fertilizer on weed growth and corn productivity. This type of research is an experiment with randomized block design (RBD) factorial pattern with two factors. The first factor is organic material (B), which consists of 4 levels, namely: = Without organic matter (B1), Tithonia diversifolia 5 t ha-1 (B2), Tithonia diversifolia 10 t ha-1 (B3), and Tithonia diversifolia 15 t ha-1(B4). The second factor is the dose of herbicide (H) which consists of 4 levels, namely: = Without herbicide (H1), Atrazine 1 l ba ha-1 = 2.5 l ha-1 (H2), Atrazine 2 l ba ha-1 = 5 l ha-1(H3), and Atrazine 3 l ha ha-1 = 7.5 l ha-1 (H4). The study used Tithonia diversifolia weed pruning as a source of organic material. Each treatment was repeated three times so that this experiment consisted of 48 experimental units. The results of the study are weed closure ranging from 4.5 - 26% (21 DAP) and 13.42 - 40.58% (41 DAP). Symptoms of corn poisoning decreased with each addition of organic matter at each dose of atrazine. The highest dry shelled yield was obtained at a dose of 15 t ha-1. Application of Tithonia diversifolia green fertilizer dosage of 10 t ha-1 sprayed with atrazine herbicide 2 l b.a ha-1 resulted in dry shelled corn of 9.61t. The conclusion was that the atrazine herbicide and Tithonia diversifolia green fertilizer in various doses in corn plantations significantly influenced the control of weeds and corn productivity.