Effect of nitrogen fertilization on the incidence of mite infestation and damage in papaya on Northern Mindanao
Issue Date
10-2012
Abstract
An experiment was set up in a farmer's field planted with yellow cultivar papaya in Santo Nino, Manolo Fortich, Bukidnon to determine the effects of different amounts of nitrogen applied on the incidence of mite infestation and consequent damage on papaya. The six treatment levels of N applied were 15, 150, 300, 450, 600 and 344 kgN/ha with 5 replicates. five trees per replicate were randomly selected every two weeks where abundance of mites and other insects were monitored on each, top, middle and bottom leaves of each sample tree. Sampling and mite assessments were started in July 2010 using mite indices for infestation and damage (Mite Infestation Index and Mite Damage Index). Tetranychus kanzawai Kishida was identified as the pest mite species in Sto. Nino area. Several species of beetles, including the mite predator Stethorus, spiders, and earwigs were sampled in the field. Mite infestations and consequent damages were pronounced on the bottom leaves compared to the middle,and the least on the top leaves. Also, predators were more numerous on the bottom leaves. In general, infestation and mite damages throughout the season appeared not affected by varying levels of nitrogen applied. The rate of 300-344 kgN/ha produced the highest fruit weight/tree and the number of fruits harvested/tree.
Source or Periodical Title
Philippine Entomologist
ISSN
0048-3753
Volume
26
Issue
2
Page
200
Document Type
Article
Frequency
semi-annually
Language
English
Recommended Citation
Quimio, G. M.; Justo, V. P.; Arcelo, M. M.; Banuag, F. N.; and Rara, T., "Effect of nitrogen fertilization on the incidence of mite infestation and damage in papaya on Northern Mindanao" (2012). Journal Article. 5170.
https://www.ukdr.uplb.edu.ph/journal-articles/5170
En – AGROVOC descriptors
ACARINA; TETRANYCHUS KANZAWAI; CARICA PAPAYA; PAPAYAS; NITROGEN FERTILIZERS; INFESTATIONS; PHILIPPINES
