San jose scale

Symptoms of damage

San Jose scales cause injury by feeding on twigs, branches, and fruit; they may also inject salivary toxins while feeding.

Heavy populations on the bark can cause gumming and kill twigs, branches, and entire trees if left uncontrolled.

A characteristic, red halolike discoloration often forms around the insect on small twigs or infested fruit.

Fruit with haloes will be culled because of its unsightly appearance.

Identification of pest

Female scale is yellowish orange, round, slightly convex and raised a little at the centre with a black pustule

Males are small and more linear shape

Pink colour discolouration on stem

Pink colour discolouration on stem

Scales on fruits


Select nursery stock free from scale infestation

Spray application of systemic insecticides like phosalone 0.05% and methyl demeton 0.025%

Field release of coccinellid predators like Chilocorus nigritus and parasitoid, Encarsia perniosi

Green peach aphid

Symptoms of damage

Nymph and adults suck the sap from leaves , new shoots, fruits and flower buds

Infested leaves become pitted and curled

Young fruits are shriveled and drop pre maturely

Fruit setting affected in severe infestation

Its transmits plum pox virus

Identification of pest

Adults are pale yellowish green or pink with three dark lines on the back of a abdomen

Plum pox virus




Remove and destroy the damaged plant parts along with nymphs and adults

Encourage parasitoid, Aphelinus mali and predators, Coccinella septumpunctata and Bacillus eucharis

Spray dimethoate 0.03% or methyl demeton 0.025%

Peach borer

Symptoms of damage

Beetle feed on leaves

Young grubs bore into and feed inside bark and make irregular galleries

Gum globules appear at the points of entrance on bark


Collect and destroy the damaged shoots and branches

Swab trunk with carbaryl 50 WP at 0.2%

Spray malathion 0.1% .

Field release of some natural enemies like gray field antFormica aerata, chalcid wasps, Copidosoma (=Paralitomastixvaricornis and Hyperteles lividus,

Spray application of Bacillus thuringiensis (Bt) products have been effective if applied when larvae are first noticed and before they tunnel into twigs, buds or fruit.

Spray application of following insecticides