02721nam a22001937a 4500003000400000005001700004008004100021040001400062100002800076245012500104260003400229300003000263500015500293504003200448520188200480942001602362999001702378952013202395OSt20250807160600.0241210b        |||||||| |||| 00| 0 eng d  aMMSUcULS  aHernandez, Chabelita A.  aEffects of different botanical extracts againts aphids of string beans (Phaseolus vulgaris L.) /cChabelita A. Hernandez  aCity of Batac :bMMSU,c2024.  axiv, 68 leaves :c29 cm.   aThesis (BS Agriculture major in Horticulture) -- Mariano Marcos State University-College of Agriculture, Food and Sustainable Development, Batac City
  aBibliography : leaves 45-50  aA field experiment was conducted to evaluate the effects of different botanical 
extracts against aphids on string beans at Barangay 13 Mabanbanag, Vintar, Ilocos 
Norte, from January to April 2023. Specifically, it aimed to: 1) evaluate the effect of 
different botanical extracts on the growth and yield of string beans; 2) assess the effect 
of different botanical extracts in controlling aphids and other pests of string beans; and 
3) evaluate the profitability of using botanical extracts in string bean production. The 
study was laid out in a Randomized Completely Block Design (RCBD) with three 
replications. The treatments included untreated plants, commercial insecticides, chili, 
kakawate, and tobacco extracts. 
The results showed that the vine length of string bean plants, number of lateral 
branches, pod length, and the percentage of marketable and unmarketable pods were 
not significantly affected by the application of the different botanical extracts. 
However, yield per hectare was significantly higher in plants treated with commercial 
insecticide. 
During the first and fourth weeks of observation, the botanical insecticides 
showed significant effects in aphid infestation. Plants treated with tobacco extract had 
the lowest infestation, comparable to those treated with chili and kakawate extracts and 
untreated plants. Before the application, all treatments groups experienced moderate 
aphid damage, but after application, no damage was noted on the plants. The 
application of chili, kakawate, and tobacco extracts had a comparable effect on the 
reduction of aphid colonies. 
Plants treated with chili extract recorded the highest cost of production at Php 
49,275.00. However, it also yielded the highest gross income compared to commercial 
insecticide at Php 96,250.00, net income at Php 49,225.00, and return on investment at 
104.68%.   2lcccTHEDIS  c24329d24329  00102lcc4070aMMSU_MAINbMMSU_MAINcTHESESd2024-12-10i7494l0pUTHESIS-7494r2024-12-10w2024-12-10yTHEDISzRoom Use Only