Stem-end rot (SER) of avocado is caused by several fungal species, and it is presented worldwide. This plant disease currently affects several avocado producer regions in Peru, causing fruit rot, impacting the industry negatively. Research about SER distribution in the canopy of avocado trees is limited. Thus, the present study aimed to compare which areas in the canopy are prone to have more SER in ‘Hass’ avocado harvested fruit in two different coastal areas in Peru. The experiment was conducted in the northern (Barranca) and southern (Cañete) of Lima. ‘Hass’Avocado fruits from both producer areas were collected to identify the causal agent; Lasiodiplodia theobromae was isolated from infected fruits. Identification was conducted based on morphological features and a partial DNA sequence of the translation elongation factor 1-α gene (tef1-α). The results showed that fruits in...

The genus Trichoderma is primarily recognized for its role as a biocontrol agent against various plant pathogens. Among the actions exhibited by this genus is its activity against Phytophthora capsici (P.c.), the causal agent of crown rot, foliar blight, and fruit rot in pepper cultivation. This study evaluated the antagonistic activity of T. koningiopsis and T. lentiforme against P. capsici. These species, isolated from the Peruvian central rainforest, were previously identified through morphological and molecular methods. The research was conducted in two phases: 1) In the in vitro phase, the treatments included isolates of T. koningiopsis, T. lentiforme, and T. harzianum, each tested both individually and against P. capsici, along with a positive control (+P.c.); 2) For the in vivo phase a negative control (-P.c.) was included. The in vitro antagonism evaluation featured a dual plate ...