Department of Plant Protection

Technologies Developed

IPM Module for Onion

  • Selection of healthy onion seed bulbs
  • Bulb treatment with  Pseudomonas fluorescens (5 g/kg) + Trichoderma viride (5 g/kg)
  • Soil application of Pseudomonas fluorescens (1.25 kg/ha) + viride (1.25 kg/ha)  + VAM  12.5 kg/ha) + Azophos (4 kg/ha) + Neem cake (250 kg/ha)
  • Growing maize as border crop
  • Installation of yellow sticky traps 12/ha
  • Installation of pheromone traps (Spodoptera litura) 12/ha
  • Spraying of Pseudomonas fluorescens(5 g/l)+ Beauveria bassiana (10 g/l) on 30 DAP
  • Spraying of Azadirachtin 1 % (2 ml/lt) on 40 DAP
  • Need Based Application of profenophos (2 ml/l) or dimethoate (2ml/l) or

triazophos (2ml/l) for  thrips/leaf miner/cutworm management.

  • NBA of mancozeb (2 g/l)/ tebuconazole (1.5 ml/l)/ Zineb (2 g/l)

Other findings

  • Spraying of Cyantraniliprole @ 75 g a.i/ha commencing from new flush/flower initiation to fruiting stage (five sprays – need based application) was effective in controlling pomegranate thrips (Scirtothrips dorsalis) damaging foliage, flowers and fruits and lepidopteran fruit borer, Pomegranate butterfly, (Deudorix isocrates) damaging flowers
  • Foliar spray of Nativo 75 WG (Trifloxystrobin 25 % + Tebuconazole 50 %) readymix @ 300 g/ha just after the initiation of disease and subsequently at 15 days interval depending upon the severity of the disease was found to be the most effective in minimizing the Alternaria leaf spot, grey mildew and boll rot coupled with highest kapas yield.

Nematode Management

  • Citrus nematode, Tylenchulus semipenetrans population in acid lime was high in the month of February and low in the month of November. Consortia containing (Pfbv 22 + Bbv 57) @ 40 g + 50 kg of pressmud/tree recorded minimum nematode population

Patent filed

  • Yasodha, P., P. M. M.David, A.S.C. Bose, S. Susmitha, R.K.N. Kumar, L.Allwin, S.S.J.Roseleen, A.K.Pushpam, D.Vasanthi and K.G. Sabarinathan. Instant Residue Indicator Drop (iRID) for Detecting Agrochemical Residues on Crop Samples (Patent Application No. 201841010373 dt. 21.3.2018)

Research findings from the PG thesis work

  1. Studies on blue banded bees

Blue banded bees are solitary bees and they nest in ground. The dominant species found in the campus is Amegilla zonata. Several hundred nests of these bees have formed nest congregations in Japanese garden. In addition their nests were found invariably in all flower pots. The female bee digs a tunnel in the soil and constructs a group of cells (1-12) for rearing its progeny. Each cell provisioned with pollen bread (0.05g) as food for the developing grub. They are efficient pollinators of brinjal, tomato, bhendi, drumstick and bitter gourd and pollinate plants through buzz pollination. Male bees are found to form sleeping aggregation after dusk on twigs.

  1. Lactic Acid Bacteria in Rice IPM

Presence of Lactic Acid Bacteria (LAB) on Rice Leaves was found to deter the egg laying by yellow stem borer. LAB is present in different parts of rice plants which are commonly preferred for oviposition.

iii. Insecticide Residues

A novel, simple, low cost water droplet method was developed to detect the presence or absence of insecticide residues on treated plant surface. The globular shape of the droplet indicated the absence of residues and flat one denoted the presence of residues.

  1. IPM in High Density Guava

Papaya mealybug was a problem in high density guava than in normally planted guava. Red mite, Brevipalpus phoenicis was an emerging pest in high density guava. Application of Pseudomonas flourescens 5 g/ l reduced the incidence of red mite.