Can you clarify which military coup you are referring to? I would assume you mean 1963, but UFC and its successors have been major players in Honduras for quite a long time.
similar to guatamala in 1954, bananas dominated honduran exports and as their largest exporter, UFC wanted to maximize their profits off the nations privatized fruit and mining industries as honduras sank further into debt and its landless peasant class was exploited and poisoned by UFC labor practices. "The dictators helped United Fruit's business by creating a system with little or no social reform, and in return United Fruit helped them remain in power". (Bucheli, Marcelo (July 2008). "Business History". Multinational corporations, totalitarian regimes and economic nationalism: United Fruit Company in Central America, 1899-1975. 50: 433–45)
mass strikes by workers in 1954 calling for agrarian reform and workers rights were effective in calling attention to the poor quality of life caused by UFC and standard fruit companies.
"In response, the government set up a colonization program. Between 1958 and 1960, some 75,000 acres of land were distributed. In 1961 a National Agrarian Institute (Instituto Nacional Agrario—INA) was established to oversee the process. A year later Villeda sponsored a new peasant union, the National Association of Honduran Peasants (Asociación Nacional de Campesinos de Honduras—ANACH), to counteract a more radical organization." (Schulz & Schulz, The United States, Honduras, and the Crisis in Central America (1994), p. 29.) "Despite the limited gains, the 1954 strike marked a major turning point in the growing strength of the Honduran labor movement and the decline of the fruit companies over state affairs. Coupled with the 1949 labor law, the settlement of the 1954 labor strike paved the way for the full unionization of Honduran labor in 1955, when the state legalized 50 unions, including the North Coast banana workers." Leonard, History of Honduras (2011), p. 141.
the limited reforms prompted the right to make accusations of communist sympathy on the left in both the us and honduras.
"In an underdeveloped country, the military had become the most developed political institution. The United States played a vital role in fashioning that army. In the 1954 agreement that established the military relationship, the United States promised military aid and in return Honduras promised to open for U.S. Exploitation any 'raw and semi-processed materials required by the United States of America as a result of deficiencies or potential deficiencies in its own resources.' (That provision and other parts of the treaty resembled clauses in the 1903 pact in which the United States made a virtual colony out of Panama.)” LaFeber, Inevitable Revolutions (1993), p. 182.
the ufc pressured the government of the united states to use its close ties with the honduran military and political leverage within the honduran government to keep uncultivated land from being expropriated by the honduran gov reforms. in response to pressure from the united states threatening to, among other things, cut aid, and the constant threat of military coup from the right, agrarian reform was severely limited. animosity towards the military by workers and peasants saw this and a failed 1959 military coup as large misuses of military power and a grassroots movement to disarm the military began.
when public elections threatened to elect a president who might attempt the goals popular with laborand the general public, including military proscription, a successful coup took place, installing a military dictator and ensured united states private corporations interests would not be threatened by organized labor. american companies economic control over honduras grew, and the government sank further into debt. so it looks like the united fruit company was not fully responsible for the coup, but their pressuring of the US and honduran governments to disrupt labor organizing and reform helped sow the seeds of military coup.
the public battle over militarization and democracy in the honduras 1954-1963
fun facts: united states also sponsored right wing coups in costa rica (1948), guatamala (1954), paraguay (1954), peru (1962), brazil (1964), chile (1973), uruguay (1973), el salvador (1979), and panama (1989)