Monitored Gelechiidae: Lepidoptera in the traps of pheromone times of appearance and numerical density Lahj Governorate Republic of Yemen.
A field experiment was carried out to Monitoring of the tomato leaf miner Tuta absoluta to study the times of appearance and disappearance of the blight and the extent of its spread during the period from the beginning of April 2017 until the end of March 2018. Two sites were selected for this study, and the results of the pheromone traps suspended in both sites indicated that the insect existed during the year, but the number of them has increased and decreased based on effective environmental circumstance. The number of insects in April in both sites reached to 254 and 78 insect/per month, respectively. The number of insects decreased in May, June, July, August and September. The total number of insects in both sites increased in October to February, with the maximum number of insects in both sites (5652 and 3110 insect/per month, respectively) and The insects decreased in activity slightly in March, where the insect numbers in both sites reaching to 5150 and 2440 insect/per month, respectively. The total number of insects detected at the first site during the study period was 13142 insects, while the total number of insects detected at the second t site was (6462 insects).