By T.V. Sathe
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Additional resources for Sugarcane Pests and Diseases
93 units respectively. 40 I Sugarcane Pests and Diseases Due to feeding of C. lanigera, the length, girth and weight of cane and percentage of sucrose, glucose, CCS, brix and purity are markedly affected (Gupta & Goswami, 1995). Due to black sooty moulds on sugarcane drying of leaves, loss in yield and sugar recovery is recorded in almost al! sugarcane varieties cultivated in Maharashtra. The most favourable temperature for the development of this pest ranged from 20°C - 23°C. Below 15°C and above 28°C the pest becomes inactive.
Hind tibia shows spiny ridge. Eggs are creamy white, oval when newly laid but becomes sperical after 2 days. 7 mm (in length and width). Second instar and third instar measures 28 x 7 and 47 x 12 mm respectively. Pupa is exarate type, 32 x 15 mm in body size and creamy white initially but later becomes brown. Life cycle Adults appear during November-February. After mating, the females lay eggs singly in soil at the depth of 5-10 cm mostly at day time. Female lay eggs from 26 to 67 in an earthce1l of diameter 1 to 2 cm.
Avoid spread of the pest. (v) Use pest resistant varieties for cultivation of sugarcane. Varieties having lower percentage of nitrogen, total soluble sugar and higher silica are less suceptible to pest (Ex. CO-7125) (vi) Avoid excess use of nitrogenous fertilizers since infestation of aphid increases above recommended dose of nitrogenous fertilizers. (vii) Intercropping with cowpea, green gram, black gram, ladies finger, cabbage, etc. is useful for pest suppression. (viii) Weed management can also help in reducing pest population (ex.