Division of Crop Protection

Major Areas of Research

  • Fungal pathology
  • Plant bacteriology
  • Plant virology
  • Plant nematology
  • Entomology

Facilities Avaiable

The division has well equipped laboratories for basic and strategic research on insect pests, diseases and nematodes. Some of the important laboratories are -

  • Biocontrol
  • Insect-bio-ecology
  • Insect toxicology
  • Pesticide residue
  • Fungal pathology
  • Bacteriology
  • Plant virology
  • Plant parasitic nematode

Research Achievements


Brinjal

  • Brinjal shoot and fruit borer (BSFB) can be managed by selection of oblong/small fruited cluster bearing varieties and hybrids, installing sex pheromone baited plastic funnel trap at 10 m distance from 20 DAT, the pheromone septa should be changed at 45 days interval, along with clean cultivation through clipping of infested shoot with larvae inside at weekly interval from 15 DAT until the shoot infestation is lost and removal of freshly damaged fruits at each harvest.  In case of severe infestation need based foliar spray of neem seed kernal extract (4%) may be given.

  • Intercropping of brinjal (2 rows) with coriander (one row) or fennel (1 row) minimizes the incidence of brinjal shoot and fruit borer.

  • Seed treatment with imidacloprid @ 2.5g/kg reduces the leafhopper and little leaf incidence.

  • Spraying carbendazim @ 0.1% gave good control of Phomopsis blight.

  • Seed treatment with captan @ 0.25% and soil treatment with Trichoderma powder @ 5kg/ha gave good control against damping off.

  • Soil drenching twice with Trichoderma @ 1% near collar region provided protection against collar rot and wilt diseases.

 


Tomato

  • Planting of 2 rows of African marigold as trap crop with every 14 rows of tomato along with, installation of H armigera pheromone traps @ 4/ha to monitor the initial attack of pest, innundative release of Trichogramma brassiliensis @ 2, 50,000 parasitized eggs/ha at 10 days interval at the beginning of flowering and fruiting and spray of Ha NPV @ 350 LE/ha twice after flowering can manage the fruit borer. Use of synthetic pyrethroids and endosulfan alternatively with NSKE (4%) is effective against fruit borer.

  • Marigold was also identified as suitable intercrop/border crop for leafminers as well as fruit borer management apart from harboring activity of major parasitoid of leafminer Neochrysocharis Formosa, the fruit borer parasitoids Microplitis sp, Cotesia sp., Campoletis chlorideae and a polyembryonic parasitoid, Copidosoma sp.

  • Seed treatment with imidacloprid, netting of nursery, spray 4% NSKE minimize whitefly population, TLCV and leaf miner incidence. Pre transplanting application of imidacloprid  @ 0.3 ml/lit  in nursery protects the newly planted crop from whitefly infestation.

  • Soil application of neem cake @ 100g +Trichoderma@10g/ sq.m in nursery bed controlled post - emergence damping off completely.

  • Summer ploughing, green manuring with sunhemp/ dhaincha, application of Trichoderma powder @ 5 kg/ha and soil drenching twice with T. viride @ 1% controlled wilt disease.

  • Single spray of copper oxychloride@ 0.3% in kharif and mancozeb@ 0.25% in winter gave good control against early blight

  • Alternaria blightappears in 11th standard meteorological week( SMW) at diurnal temperature 14.3-32.10 C and progressed maximum in 14th SMW at an avg. temperature of 24.70C.

 


Chilli

  • The mite infestation in early crop growth phase reduces the yield to a greater extent. 

  • At cellular level, the difference in damage symptoms caused by mites and thrips were established.

  • Actinomycetes, a bacterium (Gram negative) a fungus A. phytoseid predator Amblyseius sp. and anthocorid bug (Orius Sp) was found frequently associated with P. latus. Actinomycetes and bacteria caused mortality to the extent 20%.

  • The Desirable varieties/lines with higher tolerance index were identified as Japanese longi, NEC, VR 338, G-4, PBC-535 and VNS-4.

  • Chlorfenapyr @ 1.5 ml/l, abamectin @ 1.5 ml/l and spiromesifen @ 0.75 ml/l were found highly effective against yellow mite and thrips in chilli

  • Soil application  of neem cake @ 100g and Trichoderma@10 g/m2 in nursery followed by seed treatment with carbendazim @ 2.5 g/kg of seed controlled damping off

  • 2 sprays of flusilazole @ 0.1% gave a good control of anthracnose

  • Seedling dip in imidacloprid @ 0.25% solution for 30 minute followed by seedling dip in Trichoderma @ 1% for 10 minutes gave protection against soil borne pathogen and whitefly

  • Die-back and anthracnose: Colletotrichum capsici infection initiated from last week of September and progressed to 3rd week of October. 22-320 C, >90% RH with rainfall are the predisposing factors.


Okra

  •  June first week sowing is most ideal to avoid the damage of shoot and fruit borer damage during rainy season.

  • Seed treatment with imidacloprid @ 3 g/kg protects the crop from jassid damage upto 50-60 days of sowing.

  • Three sprays of neem formulation @ 2.5 ml/lit + endosulfan in half of the recommended dose during post flowering period at 49, 61 and 73 DAS were effective and safer combination for controlling fruit borer.

  • Foliar spraying of dicofol @ 2.5ml/l and wettable Sulphur (0.2%) alternatively at 10 days interval effectively controls spider mite.

  • Rove beetle, Paederus varicornis is identified as an important predator of jassids

  • 2-3 foliar spray of difenconazole or hexaconazole @ 0.05% gave appreciable protection against leaf spot and powdery mildew diseases.

  • Tolerant varieties to YVMV like VRO-5 and VRO-6 should be used.

  • Seed treatment with carbendazim @ 0.3% should be done for good establishment of the seedlings.

 


Cole Crops

  •  Chinese cabbage was identified as an ideal trap crop against DBM in cabbage and cauliflower crop.

  • Diamondback moth population in cabbage can be managed by growing paired mustard rows with every 25 cabbage rows. The first row of mustard should be sown 15 days before and second 25 days after cabbage planting. Dichlorovos 0.1% is sprayed at weekly interval on the mustard to kill the trapped DBM larvae.  If required NSKE (5%) may be sprayed to control the larval population in main crop.

  • Sowing of coriander as border crop and foliar spray of entomopathogenic fungal (Verticillium lecani) formulation @ 500 g/ha at 10 days interval is most effective in the management of cabbage aphid.

  • Spray of Bt formulations (Delfin®/Dipel®) @ 500 g/ha at 35 and 50 days after planting were found effective against DBM in cabbage.

  • The Spodoptera litura in early cauliflower and cabbage can be managed by hand removal and destruction of egg masses followed by three foliar spray of SlNPV @ 300 LE/ha mixed with sticker (0.05%) and jaggery (2%) at an interval of 10 days. NPV spraying should be done at early morning and late evening to reduce the adverse effect of UV irradiation on NPV solution.

  • Nursery application of neem cake @100g/m2 and seed soaking in streptocycline @100 ppm protected the damping off and bacterial rot pathogens.

  • Removal of lower leaves in the morning, burning them and a subsequent spray of mancozeb @ 0.25% along with a sticker @ 0.1% gave a good control against Alternaria leaf spot.

 


Cucurbits                                                      

  • Fruit fly can be managed through mass trapping of adult males using mineral water bottle traps (25-30 traps/ha) baited with cuelure (1 part), ethyl alcohol (6 parts) and carbaryl (2 parts) saturated wood blocks at 15 mt distance from trap to trap coinciding with initiation of flowering along with bait spray containing 10% molasses and 0.2% carbaryl applied in one plant per 100 m2 area.  

  • Food bait consisting of rotten banana /pumpkin pulp (1000g) + yeast (10 g) + malathion (10 ml) + citric acid (3 g) may be used in flat earthen pot to attract and kill the adult fruit flies.

  • Bait spray containing 20 ml malathion (50 EC) + 20 liters water +500 g molasses attract adult flies and control the population.

  • Spraying of carbaryl 50 WP @ 2 g/lit at cotyledon stage control red pumpkin beetles.

 


Pea

  • 2 foliar sprays of penconazole@0.05% or flusilazole @0.1% gave a good control against powdery mildew disease.