RUST AND MILDEW IN INDIA. 41 



greatly, it is difficult to avoid the conclusion that the parasite had 

 much to say to it. 



1879. Humidity on the whole deficient, especially in April ; 

 cloud normal in January, slightly in excess in February, and defi- 

 cient in March and April (especially in the latter month) ; rain 

 deficient in all months except May. Conditions decidedly un- 

 favourable to the fungus, but also to the host, from excessive 

 dryness. Outturn very small 



and prices hig 



1880. Humidity, cloud, and rain deficient in all months. 

 These conditions decidedly unfavourable to the parasite, and also 

 to the host. A small rise in outturn. 



1881. Humidity deficient in January, normal in February, 

 and excessive in March and April ; cloud on the whole excessive ; 

 rain deficient, except in March. Conditions on the whole as 

 favourable to host as to fungus. Outturn rose, but only to the level of 

 1877, a year whose deficit we traced to the possible influence of rust. 



1882. Humidity deficient ; cloud on the whole deficient 

 (especially in February) ; rain on the whole deficient (with the 

 doubtful exception of April). Conditions unfavourable to host, and 

 especially to parasite. The fall in outturn was therefore probably 

 due to the direct influence of climate on the host. 



1883. Humidity excessive in January, deficient in Februan*, 

 about normal in March, and very deficient in April ; cloud on the 

 whole excessive in the earlier three months, and deficient in April 

 and May ; rain deficient, except in March. Conditions fairly 

 favourable to the host, and a normal humidity, with excessive cloud 

 and normal rain in March, would be favourable to fungal develop- 

 ment. Outturn fell slightly. 



1881. Humidity about normal in January and February, very 

 deficient in March, and generally deficient in April and May ; 

 cloud deficient in January and March, about normal in February, 

 and excessive in April; rain about normal in January, but deficient 

 in the remaining months. The deficiency in rain unfavourable to 

 the parasite, but the conditions were on the whole favourable to 



the host. Outturn rose somewhat. 

 1885. 



February 



March, and deficient in April ; cloud excessive in January, March 

 and April, but deficient in February; rain generally excessive. 

 Conditions very favourable to both host and parasite. Outturn 



rose, but slightly. 



1886. Humidity excessive in January and and March, normal 

 in February, and deficient in April ; cloud the same ; rain deficient 

 in all months except May, when it was normal. The conditions, 

 but for the deficiency in rain, would have been very favourable for 

 the fungus and host ; but the rain deficiency was unfavourable to 

 both. Outturn fell considerably. 



1887- Humidity excessive in January, but defici* 



thereafte 



and 



thereafter. Conditions in January most favourable to the parasite, 

 but the climate in the succeeding months was unfavourable to both 

 host and parasite. Outturn continued to fall. 



